Updated on 2024/10/29

写真a

 
FUJII, Toshiaki
 
Organization
Graduate School of Engineering Information and Communication Engineering 1 Professor
Graduate School
Graduate School of Engineering
Undergraduate School
School of Engineering Electrical Engineering, Electronics, and Information Engineering
Title
Professor
Contact information
メールアドレス
External link

Degree 1

  1. 博士(工学) ( 東京大学 ) 

Research Interests 2

  1. 3D Visual Communications

  2. 3D Image Engineering

Research Areas 2

  1. Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Communication and network engineering  / Communication/Network Engineering

  2. Informatics / Intelligent informatics

Current Research Project and SDGs 1

  1. Compression, transmission, processing of 3D spatial information

Education 2

  1. The University of Tokyo   Graduate School, Division of Engineering

    - 1995

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    Country: Japan

  2. The University of Tokyo   Faculty of Engineering

    - 1990

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    Country: Japan

Professional Memberships 4

  1. IEEE(The Institute of Electrical and Electronics Engineers)

  2. 電子情報通信学会

  3. 映像情報メディア学会

  4. 情報処理学会

Awards 2

  1. 電子情報通信学会 学術奨励賞

    1997  

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    Country:Japan

  2. 映像情報メディア学会 藤尾記念賞

    1997  

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    Country:Japan

 

Papers 249

  1. Editorial Special Issue on Light Field Imaging

    Conti, C; Gotchev, A; Bregovic, R; Dansereau, DG; Perra, C; Fujii, T

    SIGNAL PROCESSING-IMAGE COMMUNICATION   Vol. 129   2024.11

  2. Holographic phase retrieval via Wirtinger flow: Cartesian form with auxiliary amplitude

    Uchiyama, I; Tsutake, C; Takahashi, K; Fujii, T

    OPTICS EXPRESS   Vol. 32 ( 12 ) page: 20600 - 20617   2024.6

  3. Compressive Acquisition of Light Field Video Using Aperture-Exposure-Coded Camera

    Mizuno, R; Takahashi, K; Yoshida, M; Tsutake, C; Fujii, T; Nagahara, H

    ITE TRANSACTIONS ON MEDIA TECHNOLOGY AND APPLICATIONS   Vol. 12 ( 1 ) page: 22 - 35   2024

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  4. Toward Neural Light-Field Compression

    Ishikawa, Y; Tsutake, C; Takahashi, K; Fujii, T

    INTERNATIONAL WORKSHOP ON ADVANCED IMAGING TECHNOLOGY, IWAIT 2024   Vol. 13164   2024

  5. Unsupervised Framerate Upsampling from Events

    Okuno, H; Tsutake, C; Takahashi, K; Fujii, T

    INTERNATIONAL WORKSHOP ON ADVANCED IMAGING TECHNOLOGY, IWAIT 2024   Vol. 13164   2024

  6. Achieving Successful VLC Signal Reception Using A Rolling Shutter Image Sensor While Driving at 40 km/h

    Kamiya, S; Tang, ZQ; Yamazato, T; Kinoshita, M; Kamakura, K; Arai, S; Yendo, T; Fujii, T

    IEEE PHOTONICS JOURNAL   Vol. 15 ( 4 )   2023.8

  7. Simultaneous Visible Light Communication and Ranging Using High-Speed Stereo Cameras Based on Bicubic Interpolation Considering Multi-Level Pulse-Width Modulation

    Huang, RY; Kinoshita, M; Yamazato, T; Okada, H; Kamakura, K; Arai, S; Yendo, T; Fujii, T

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES   Vol. E106A ( 7 ) page: 990 - 997   2023.7

  8. Compressing Light Field as Multiplane Image

    Kawakami Masaki, Tsutake Chihiro, Takahashi Keita, Fujii Toshiaki

    ITE TRANSACTIONS ON MEDIA TECHNOLOGY AND APPLICATIONS   Vol. 11 ( 2 ) page: 27 - 33   2023

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  9. High-Speed Image Sensor Com-munication Using High Dy-namic Range Combining

    Huang, RY; Yamazato, T; Kinoshita, M; Okada, H; Arai, S; Kamakura, K; Yendo, T; Fujii, T

    IEICE COMMUNICATIONS EXPRESS   Vol. 12 ( 9 ) page: 493 - 498   2023

  10. Direct Super Resolution for Multiplane Images

    Sato Chisaki, Tsutake Chihiro, Takahashi Keita, Fujii Toshiaki

    ITE TRANSACTIONS ON MEDIA TECHNOLOGY AND APPLICATIONS   Vol. 11 ( 2 ) page: 34 - 42   2023

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  11. Direct Super Resolution for Multiplane Images

    Sato, C; Tsutake, C; Takahashi, K; Fujii, T

    ITE TRANSACTIONS ON MEDIA TECHNOLOGY AND APPLICATIONS   Vol. 11 ( 2 ) page: 34 - 42   2023

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  12. Compressing Light Field as Multiplane Image

    Kawakami, M; Tsutake, C; Takahashi, K; Fujii, T

    ITE TRANSACTIONS ON MEDIA TECHNOLOGY AND APPLICATIONS   Vol. 11 ( 2 ) page: 27 - 33   2023

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  13. Reconstructing Continuous Light Field From Single Coded Image

    Ishikawa, Y; Takahashi, K; Tsutake, C; Fujii, T

    IEEE ACCESS   Vol. 11   page: 99387 - 99396   2023

  14. Compressing Sign Information in DCT-based Image Coding via Deep Sign Retrieval

    Suzuki, K; Tsutake, C; Takahashi, K; Fujii, T

    ITE TRANSACTIONS ON MEDIA TECHNOLOGY AND APPLICATIONS   Vol. 12 ( 1 ) page: 110 - 122   2023

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  15. Unrolled Network for Light Field Display

    Matsuura, K; Tsutake, C; Takahashi, K; Fujii, T

    IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS   Vol. E105D ( 10 ) page: 1721 - 1725   2022.10

  16. Time-Multiplexed Coded Aperture and Coded Focal Stack -Comparative Study on Snapshot Compressive Light Field Imaging

    Tateishi, K; Tsutake, C; Takahashi, K; Fujii, T

    IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS   Vol. E105D ( 10 ) page: 1679 - 1690   2022.10

  17. Pixel-density enhanced integral three-dimensional display with two-dimensional image synthesis

    Watanabe, H; Rai, J; Tsutake, C; Takahashi, K; Fujii, T

    OPTICS EXPRESS   Vol. 30 ( 20 ) page: 36038 - 36054   2022.9

  18. Unsupervised disparity estimation from light field using plug-and-play weighted warping loss

    Iwatsuki, T; Takahashi, K; Fujii, T

    SIGNAL PROCESSING-IMAGE COMMUNICATION   Vol. 107   2022.9

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  19. Denoising multi-view images by soft thresholding: A short-time DFT approach

    Tomita, K; Tsutake, C; Takahashi, K; Fujii, T

    SIGNAL PROCESSING-IMAGE COMMUNICATION   Vol. 105   2022.7

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  20. Roadside LED Array Acquisition For Road-to-Vehicle Visible Light Communication Using Spatial-Temporal Gradient Values

    Nakamura Kento, Huang Ruiyi, Yamazato Takaya, Kinoshita Masayuki, Kamakura Koji, Arai Shintaro, Yendo Tomohiro, Fujii Toshiaki

    IEICE COMMUNICATIONS EXPRESS     2022.1

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    Language:Japanese  

    DOI: 10.1587/comex.2022TCL0008

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  21. Welcome to the Special Section on Invited Papers of Media Technology and Applications Foreword

    Fujii, T

    ITE TRANSACTIONS ON MEDIA TECHNOLOGY AND APPLICATIONS   Vol. 10 ( 2 ) page: 26 - 26   2022

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  22. Roadside LED array acquisition for road-to-vehicle visible light communication using spatial-temporal gradient values

    Nakamura Kento, Huang Ruiyi, Yamazato Takaya, Kinoshita Masayuki, Kamakura Koji, Arai Shintaro, Yendo Tomohiro, Fujii Toshiaki

    IEICE COMMUNICATIONS EXPRESS   Vol. 11 ( 8 ) page: 462 - 467   2022

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    Language:Japanese  

    DOI: 10.1587/comex.2022TCL0008

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  23. Acquiring a Dynamic Light Field through a Single-Shot Coded Image

    Mizuno, R; Takahashi, K; Yoshida, M; Tsutake, C; Fujii, T; Nagahara, H

    2022 IEEE/CVF CONFERENCE ON COMPUTER VISION AND PATTERN RECOGNITION (CVPR 2022)     page: 19798 - 19808   2022

  24. Special Section on Picture Coding and Image Media Processing FOREWORD

    Fujii, T

    IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS   Vol. E104D ( 10 ) page: 1544 - 1544   2021.10

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  25. Binary and Rotational Coded-Aperture Imaging for Dynamic Light Fields

    Sakai, K; Takahashi, K; Fujii, T

    IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS   Vol. E104D ( 8 ) page: 1395 - 1398   2021.8

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  26. Simultaneous Attack on CNN-Based Monocular Depth Estimation and Optical Flow Estimation

    Yamanaka, K; Takahashi, K; Fujii, T; Matsumoto, R

    IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS   Vol. E104D ( 5 ) page: 785 - 788   2021.5

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  27. Vehicle Distance Measurement based on Visible Light Communication Using Stereo Cameras

    Huang, RY; Yamazato, T; Kinoshita, M; Okada, H; Kamakura, K; Arai, S; Yendo, T; Fujii, T

    2021 32ND IEEE INTELLIGENT VEHICLES SYMPOSIUM (IV)     page: 853 - 858   2021

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  28. AN EFFICIENT COMPRESSION METHOD FOR SIGN INFORMATION OF DCT COEFFICIENTS VIA SIGN RETRIEVAL

    Tsutake, C; Takahashi, K; Fujii, T

    2021 IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING (ICIP)     page: 2024 - 2028   2021

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  29. AN EFFICIENT IMAGE COMPRESSION METHOD BASED ON NEURAL NETWORK: AN OVERFITTING APPROACH

    Mikami, Y; Tsutake, C; Takahashi, K; Fujii, T

    2021 IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING (ICIP)     page: 2084 - 2088   2021

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  30. FACTORIZED MODULATION FOR SINGLE-SHOT LIGHT-FIELD ACQUISITION

    Tateishi, K; Sakai, K; Tsutake, C; Takahashi, K; Fujii, T

    2021 IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING (ICIP)     page: 3253 - 3257   2021

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  31. HEVC-based Light-field Coding using Basis Images and Frame Reordering

    Imaeda, K; Takahashi, K; Fujii, T; Bandoh, Y; Takamura, S; Kimata, H

    ITE TRANSACTIONS ON MEDIA TECHNOLOGY AND APPLICATIONS   Vol. 9 ( 1 ) page: 86 - 94   2021

  32. Comparing Pixel Predictors for Lossless Image Coding

    Kunieda, A; Takahashi, K; Fujii, T

    INTERNATIONAL WORKSHOP ON ADVANCED IMAGING TECHNOLOGY (IWAIT) 2021   Vol. 11766   2021

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    Language:Japanese  

    DOI: 10.1117/12.2590838

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  33. Learning to Synthesize Dense Focal Stack and All-in-Focus Image from Sparse Focal Stack

    Tateiwa, F; Takahashi, K; Fujii, T

    INTERNATIONAL WORKSHOP ON ADVANCED IMAGING TECHNOLOGY (IWAIT) 2021   Vol. 11766   2021

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    DOI: 10.1117/12.2590813

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  34. Comparison of distance performances of modulation schemes in intelligent transport system image sensor communication

    Yamamoto, T; Yamazato, T; Okada, H; Kinoshita, M; Kamakura, K; Arai, S; Yendo, T; Fujii, T

    IEICE COMMUNICATIONS EXPRESS   Vol. 10 ( 8 ) page: 498 - 504   2021

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    DOI: 10.1587/comex.2021ETL0032

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  35. Roadmap on 3D integral imaging: sensing, processing, and display

    Javidi, B; Carnicer, A; Arai, J; Fujii, T; Hua, H; Liao, H; Martínez-Corral, M; Pla, F; Stern, A; Waller, L; Wang, QH; Wetzstein, G; Yamaguchi, M; Yamamoto, H

    OPTICS EXPRESS   Vol. 28 ( 22 ) page: 32266 - 32293   2020.10

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  36. Good Group Sparsity Prior for Light Field Interpolation

    Fujita, S; Takahashi, K; Fujii, T

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES   Vol. E103A ( 1 ) page: 346 - 355   2020.1

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  37. Disparity Compensation Framework for Light-Field Coding Using Weighted Binary Patterns

    Isechi, K; Takahashi, K; Fujii, T

    ITE TRANSACTIONS ON MEDIA TECHNOLOGY AND APPLICATIONS   Vol. 8 ( 1 ) page: 40 - 48   2020

  38. Comparison of Layer Operations and Optimization Methods for Light Field Display

    Maruyama, K; Takahashi, K; Fujii, T

    IEEE ACCESS   Vol. 8   page: 38767 - 38775   2020

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  39. Performance Evaluation of Range Estimation for Image Sensor Communication Using Phase-only Correlation

    Huang, RY; Kinoshita, M; Yamazato, T; Okada, H; Kamakura, K; Arai, S; Yendo, T; Fujii, T

    2020 IEEE GLOBECOM WORKSHOPS (GC WKSHPS)     2020

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  40. Fast and Robust Disparity Estimation from Noisy Light Fields Using 1-D Slanted Filters

    Houben, G; Fujita, S; Takahashi, K; Fujii, T

    IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS   Vol. E102D ( 11 ) page: 2101 - 2109   2019.11

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  41. Special Section on Picture Coding and Image Media Processing FOREWORD

    Fujii, T

    IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS   Vol. E102D ( 11 ) page: 2082 - 2082   2019.11

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  42. Light Field Coding Using Weighted Binary Images

    Komatsu, K; Isechi, K; Takahashi, K; Fujii, T

    IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS   Vol. E102D ( 11 ) page: 2110 - 2119   2019.11

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  43. High-Quality Multi-View Image Extraction from a Light Field Camera Considering Its Physical Pixel Arrangement

    Fujita Shu, Takahashi Keita, Fujii Toshiaki

    IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS   Vol. E102D ( 4 ) page: 702 - 714   2019.4

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1587/transinf.2018AWI0004

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  44. Separating Information for Space-Time Hybrid Code

    Hidaka Tomohiro, Takahashi Keita, Fujii Toshiaki

    INTERNATIONAL WORKSHOP ON ADVANCED IMAGE TECHNOLOGY (IWAIT) 2019   Vol. 11049   2019

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    DOI: 10.1117/12.2521485

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  45. Multi-View Image Coding Using Disparity-Compensated and Weighted Binary Patterns

    Komatsu Koji, Takahashi Keita, Fujii Toshiaki

    INTERNATIONAL WORKSHOP ON ADVANCED IMAGE TECHNOLOGY (IWAIT) 2019   Vol. 11049   2019

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    DOI: 10.1117/12.2521374

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  46. Generating Arbitrarily Focused Images from Sparse Focal Stack Through Light Field Reconstruction

    Ito Daiki, Takahashi Keita, Fujii Toshiaki

    INTERNATIONAL WORKSHOP ON ADVANCED IMAGE TECHNOLOGY (IWAIT) 2019   Vol. 11049   2019

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    DOI: 10.1117/12.2521486

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  47. Extracting Multi-View Images from Multi-Focused Plenoptic Camera

    Fujita Shu, Mikawa Sho, Panahpourtehrani Mehrdad, Takahashi Keita, Fujii Toshiaki

    INTERNATIONAL FORUM ON MEDICAL IMAGING IN ASIA 2019   Vol. 11050   2019

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    DOI: 10.1117/12.2521355

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  48. A 3-D DISPLAY PIPELINE FROM CODED-APERTURE CAMERA TO TENSOR LIGHT-FIELD DISPLAY THROUGH CNN

    Maruyama, K; Inagaki, Y; Takahashi, K; Fujii, T; Nagahara, H

    2019 IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING (ICIP)     page: 1064 - 1068   2019

  49. 3D image processing using deep neural network

    Fujii, T

    THREE-DIMENSIONAL IMAGING, VISUALIZATION, AND DISPLAY 2019   Vol. 10997   2019

  50. Stereo Ranging Method Using LED Transmitters for Visible Light Communication

    Kinoshita, M; Kamakura, K; Yamazato, T; Okada, H; Fujii, T; Arai, S; Yendo, T

    2019 IEEE GLOBAL COMMUNICATIONS CONFERENCE (GLOBECOM)     2019

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  51. 多視点映像伝送システム「REI」へのSECOND-MVD手法の実装と評価 Reviewed

    石川 彰夫, 奥井 誠人, 山本 健詞, 井ノ上 直己, 寺谷 メヘルダド, 高橋 桂太, 藤井 俊彰

    映像情報メディア学会誌   Vol. 72 ( 10 ) page: J174-J182   2018.9

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.3169/itej.72.J174

  52. Designing Coded Aperture Camera Based on PCA and NMF for Light Field Acquisition

    Yagi Yusuke, Takahashi Keita, Fujii Toshiaki, Sonoda Toshiki, Nagahara Hajime

    IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS   Vol. E101D ( 9 ) page: 2190 - 2200   2018.9

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1587/transinf.2017PCP0007

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  53. Special Section on Picture Coding and Image Media Processing FOREWORD

    Fujii Toshiaki

    IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS   Vol. E101D ( 9 ) page: 2178 - 2178   2018.9

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1587/transinf.2017PCF0001

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  54. From Focal Stack to Tensor Light-Field Display

    Takahashi Keita, Kobayashi Yuto, Fujii Toshiaki

    IEEE TRANSACTIONS ON IMAGE PROCESSING   Vol. 27 ( 9 ) page: 4571 - 4584   2018.9

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1109/TIP.2018.2839263

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  55. Using high-resolution binary layers and a low-resolution multibit backlight for a layered light-field display

    Kobayashi Yuto, Takahashi Keita, Fujii Toshiaki

    OPTICAL ENGINEERING   Vol. 57 ( 6 )   2018.6

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    DOI: 10.1117/1.OE.57.6.061607

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  56. Simplified Vehicle Vibration Modeling for Image Sensor Communication

    Kinoshita, M; Yamazato, T; Okada, H; Fujii, T; Arai, S; Yendo, T; Kamakura, K

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES   Vol. E101A ( 1 ) page: 176 - 184   2018.1

  57. Simulating a Stacked-Layer Light-Field Display Using Orthographic/perspective View Models

    Mikawa Sho, Takahashi Keita, Fujii Toshiaki

    2018 INTERNATIONAL WORKSHOP ON ADVANCED IMAGE TECHNOLOGY (IWAIT)     page: .   2018

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  58. Free Viewpoint Video Generation System Using Visual Hull

    Yusuke Uemoto, Takahashi Keita, Fujii Toshiaki

    2018 INTERNATIONAL WORKSHOP ON ADVANCED IMAGE TECHNOLOGY (IWAIT)     page: .   2018

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  59. Performance Evaluation of Precoded Pulse Width Modulation for Image Sensor Communication

    Kamegawa Satoshi, Kinoshita Masayuki, Yamazato Takaya, Okada Hiraku, Fujii Toshiaki, Kamakura Koji, Yendo Tomohiro, Arai Shintaro

    2018 IEEE GLOBECOM WORKSHOPS (GC WKSHPS)     page: .   2018

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  60. Integral 3D image coding by using multiview video compression technologies

    Hara Kazuhiro, Katayama Miwa, Kawakita Masahiro, Fujii Toshiaki, Mishina Tomoyuki

    2018 ASIA-PACIFIC SIGNAL AND INFORMATION PROCESSING ASSOCIATION ANNUAL SUMMIT AND CONFERENCE (APSIPA ASC)     page: 1488 - 1494   2018

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  61. HOW SHOULD WE HANDLE 4D LIGHT FIELDS WITH CNNS?

    Fujita Shu, Takahashi Keita, Fujii Toshiaki

    2018 25TH IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING (ICIP)     page: 2600 - 2604   2018

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  62. FAST AND ROBUST DISPARITY ESTIMATION FOR NOISY LIGHT FIELDS

    Gou Houben, Fujita Shu, Takahashi Keita, Fujii Toshiaki

    2018 25TH IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING (ICIP)     page: 2610 - 2614   2018

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  63. A Comparison of Reception Methods for Visible Light Communication Using High-speed Stereo Cameras

    Kinoshita Masayuki, Yamazato Takaya, Okada Hiraku, Fujii Toshiaki, Arai Shintaro, Yendo Tomohiro, Kamakura Koji

    2018 IEEE GLOBAL COMMUNICATIONS CONFERENCE (GLOBECOM)     page: .   2018

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  64. 3D IMAGING SYSTEM USING MULTI-FOCUS PLENOPTIC CAMERA AND TENSOR DISPLAY

    Teratani (Panahpourtehrani) Mehrdad, Fujita Shu, Ouyang Wenzhe, Takahashi Keita, Fujii Toshiaki

    2018 INTERNATIONAL CONFERENCE ON 3D IMMERSION (IC3D)     page: .   2018

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  65. SCALABLE LIGHT FIELD CODING USING WEIGHTED BINARY IMAGES

    Komatsu Koji, Takahashi Keita, Fujii Toshiaki

    2018 25TH IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING (ICIP)     page: 903 - 907   2018

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  66. Learning to Capture Light Fields Through a Coded Aperture Camera

    Inagaki, Y; Kobayashi, Y; Takahashi, K; Fujii, T; Nagahara, H

    COMPUTER VISION - ECCV 2018, PT VII   Vol. 11211   page: 431 - 448   2018

  67. Estimation of Dense Displacement by Scale Invariant Polynomial Expansion of Heterogeneous Multi-View Images Reviewed

    Kazuki Shibata, Mehrdad Panahpour Tehrani, Keita Takahashi, Toshiaki Fujii

    IEICE Transaction on Information and Systems   Vol. E100-D ( 9 ) page: 2048-2051   2017.9

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  68. Sheared EPI Analysis for Disparity Estimation from Light Fields Reviewed

    Takahiro Suzuki, Keita Takahashi, Toshiaki Fujii

    IEICE Transaction on Information and Systems   Vol. E100-D ( 9 ) page: 1984-1993   2017.9

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  69. Physically-Correct Light-Field Factorization for Perspective Images Reviewed

    Shu kondo, Yuto Kobayashi, Keita Takahashi, Toshiaki Fujii

    IEICE Transaction on Information and Systems   Vol. E100-D ( 9 ) page: 2052-2055   2017.9

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  70. Special Section on Picture Coding and Image Media Processing FOREWORD

    Fujii Toshiaki

    IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS   Vol. E100D ( 9 ) page: 1943 - 1943   2017.9

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    DOI: 10.1587/transinf.2016PCF0001

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  71. Sheared EPI Analysis for Disparity Estimation from Light Fields

    Suzuki Takahiro, Takahashi Keita, Fujii Toshiaki

    IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS   Vol. E100D ( 9 ) page: 1984 - 1993   2017.9

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    DOI: 10.1587/transinf.2016PCP0004

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  72. Physically-Correct Light-Field Factorization for Perspective Images

    Kondo Shu, Kobayashi Yuto, Takahashi Keita, Fujii Toshiaki

    IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS   Vol. E100D ( 9 ) page: 2052 - 2055   2017.9

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    DOI: 10.1587/transinf.2016PCL0006

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  73. Estimation of Dense Displacement by Scale Invariant Polynomial Expansion of Heterogeneous Multi-View Images

    Shibata Kazuki, Panahpour Teherani Mehrdad, Takahashi Keita, Fujii Toshiaki

    IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS   Vol. E100D ( 9 ) page: 2048 - 2051   2017.9

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    DOI: 10.1587/transinf.2016PCL0008

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  74. Free-viewpoint image synthesis using superpixel segmentation

    Tehrani Mehrdad Panahpour, Tezuka Tomoyuki, Suzuki Kazuyoshi, Takahashi Keita, Fujii Toshiaki

    APSIPA TRANSACTIONS ON SIGNAL AND INFORMATION PROCESSING   Vol. 6   2017.6

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    DOI: 10.1017/ATSIP.2017.5

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  75. Free-viewpoint Image Synthesis Using Superpixel Segmentation Reviewed

    Mehrdad Panahpour Tehrani, Tomoyuki Tezuka, Keita Takahashi, Toshiaki Fujii

    APSIPA Transactions on Signal and Information Processing     page: 1   2017.1

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  76. PCA-CODED APERTURE FOR LIGHT FIELD PHOTOGRAPHY

    Yagi Yusuke, Takahashi Keita, Fujii Toshiaki, Sonoda Toshiki, Nagahara Hajime

    2017 24TH IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING (ICIP)     page: 3031 - 3035   2017

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  77. GOOD GROUP SPARSITY PRIOR FOR LIGHT FIELD INTERPOLATION

    Takahashi Keita, Fujita Shu, Fujii Toshiaki

    2017 24TH IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING (ICIP)     page: 1447 - 1451   2017

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    Web of Science

  78. FROM FOCAL STACKS TO TENSOR DISPLAY: A METHOD FOR LIGHT FIELD VISUALIZATION WITHOUT MULTI-VIEW IMAGES

    Kobayashi Yuto, Takahashi Keita, Fujii Toshiaki

    2017 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING (ICASSP)     page: 2007 - 2011   2017

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    Web of Science

  79. A 3-D Display Pipeline: Capture, Factorize, and Display the Light Field of a Real 3-D Scene

    Kobayashi Yuto, Kondo Shu, Takahashi Keita, Fujii Toshiaki

    ITE TRANSACTIONS ON MEDIA TECHNOLOGY AND APPLICATIONS   Vol. 5 ( 3 ) page: 88-95   2017

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    DOI: 10.3169/mta.5.88

    Web of Science

  80. The Uplink Visible Light Communication Beacon System for Universal Traffic Management

    Yamazato Takaya, Kawagita Naoaki, Okada Hiraku, Fujii Toshiaki, Yendo Tomohiro, Arai Shintaro, Kamakura Koji

    IEEE ACCESS   Vol. 5   page: 22282 - 22290   2017

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    DOI: 10.1109/ACCESS.2017.2759179

    Web of Science

  81. Modeling and Parameter Estimation of Vehicle Vibration Inducing Transmitter Displacement in ITS Image Sensor Communication

    Kinoshita Masayuki, Yamazato Takaya, Okada Hiraku, Fujii Toshiaki, Arai Shintaro, Yendo Tomohiro, Kamakura Koji

    2017 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS WORKSHOPS (ICC WORKSHOPS)     page: 144 - 149   2017

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    Web of Science

  82. Displaying Real-World Light-Fields with Stacked Multiplicative Layers: Requirement and Data Conversion for Input Multi-view Images Reviewed

    Toyohiro Saito, Yuto Kobayashi, Keita Takahashi, Toshiaki Fujii

    IEEE/OSA Journal of Display Technology   Vol. 12 ( 11 ) page: 1290-1300   2016.11

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  83. Weighted 4D-DCT Basis for Compressively Sampled Light Fields

    Y. Miyagi, K. Takahashi, T. Fujii

    IEICE Trans   Vol. E99-A ( 9 ) page: 1655-1664   2016.9

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  84. 画素配列を考慮した Light Field Camera 画像の高解像度化 Reviewed

    内田雄基, 大橋一輝, 高橋桂太, 藤井俊彰

    電子情報通信学会論文誌   Vol. J99-D ( 9 ) page: 823-835   2016.9

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  85. 可動型多眼カメラによる自由視点映像生成 Reviewed

    山田 隼輔, 高橋 桂太, 藤井 俊彰

    電子情報通信学会和文論文誌D   Vol. J99-D ( 9 ) page: 888-891   2016.9

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  86. 符号化開口により圧縮センシングした光線空間データの重み付きL1ノルム最小化による復元手法の検討

    宮城 雄介, 高橋 桂太, 要 強, パナヒプル テヘラニ メヒルダド, 藤井 俊彰

    電子情報通信学会論文誌   Vol. J98-D ( 9 ) page: 1218-1221   2015.9

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  87. Real-Time Free-Viewpoint Image Synthesis System Using Time Varying Projection Reviewed

    Tatsuro Mori, Keita Takahashi, Toshiaki Fujii

    ITE Transactions on Media Technology and Applications   Vol. 2 ( 4 ) page: 370-377   2014.10

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  88. "Reconstruction of Compressively Sampled Ray Space by Statistically Weighted Model Reviewed

    Qiang Yao, Keita Takahashi, Toshiaki Fujii

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences   Vol. E97-A ( 10 ) page: 2064-2073   2014.10

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  89. 疎な特徴点からの効率的なボクセル探索手法の検討

    大矢 宗平, 高橋 桂太, 藤井 俊彰

    電子情報通信学会論文誌   Vol. J97-D ( 9 ) page: 1467-1470   2014.9

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  90. 路車間可視光通信のための時空間勾配を特徴量とした LED アレイ捕捉手法 Reviewed

    臼井 俊亮, 山里 敬也, 岡田 啓, 藤井 俊彰

    電子情報通信学会和文論文誌   Vol. J97-B ( 7 ) page: 536-545   2014.7

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  91. Compressed Sensing of Ray Space for Free Viewpoint Image (FVI) Generation

    Q. Yao, K. Takahashi, and T. Fujii

    ITE Transactions on Media Technology and Applications   Vol. 2 ( 1 ) page: 23-32   2014.1

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  92. An Incoherence Dictionary Learning Model for Sparse Representation of EPI

    Qiang Yao, Toshiaki Fujii

        page: D11-2   2013.3

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  93. 釘付け視聴インタフェースのためのDepth-Fused 3-D ディスプレイ

    白石朝美, 藤井俊彰, 川本哲也, 間瀬健二

    2013年電子情報通信学会総合大会     page: D11-4   2013.3

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  94. {Adaptive hole filling for 3D warping-based virtual view synthesis

    Tatsuro Mori, Mehrdad Panahpour Tehrani, Toshiaki Fujii, Masayuki Tanimoto

    SPIE 2013 Electronic Imaging Science and Technology     page: 8648-79   2013.2

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  95. {Three Dimensional Reconstruction of Moving Object for SFM

    Shuhei Oya, Toshiaki Fujii

    2013 International Workshop on Advanced Image Technology     page: 813--816   2013.1

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  96. {Depth-Fused 3-D Display for Multi-View Interface

    Asami Shiraishi, Toshiaki Fujii, Tetsuya Kawamoto, Kenji Mase Page

    2013 International Workshop on Advanced Image Technology     page: 802   2013.1

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  97. {Adaptive Hole Filling for 3D Warping-Based Free View Synthesis

    Tatsuro Mori, Mehrdad Panahpour Tehrani, Toshiaki Fujii, Masayuki Tanimoto

    2013 International Workshop on Advanced Image Technology     page: 419--423   2013.1

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  98. {Virtual Image Generation by Using Super-Resolution

    Meichen Liu, Mehrdad, Panahpour Tehrani, Toshiaki Fujii, Masayuki Tanimoto

    2013 International Workshop on Advanced Image Technology     page: 430--433   2013.1

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  99. {Sparsity Analysis of EPI by Dictionary Learning Method

    Qiang Yao, Toshiaki Fujii

    2013 International Workshop on Advanced Image Technology     page: 446--450   2013.1

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  100. {走行車両が高速度カメラを用いて情報を受信するユビキタス可視光通信のための複数情報源認識手法

    白木, 山里, 岡田, 藤井, 圓道, 荒井

    電子情報通信学会論文誌 B     page: 1517--1528   2012.11

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  101. {The Decomposition of Epipolar Plane Image by Using Dictionary Learning Method

    Qiang YAO,Toshiaki Fujii

        page: P2-10   2012.10

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  102. {3D ワーピングを用いた生成自由視点画像に対する適応的ホールフィリング法

    森 達郎,Mehrdad Panahpour Tehrani,藤井俊彰,谷本正幸

    第27回画像符号化シンポジウム     page: I5-12   2012.10

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  103. {SFMを用いた動く物体の時間方向に連続した構造の推定方法に関する検討

    大矢宗平,藤井俊彰

    第27回画像符号化シンポジウム     page: I4-11   2012.10

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  104. {超解像によるFTV 画像の補間

    劉 美辰,パナヒプル テヘラニ メヒルダド,藤井俊彰,谷本正幸

    第27回画像符号化シンポジウム     page: I4-09   2012.10

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  105. {Sparse Decomposition of EPI by Using Greedy Pursuit Algorithm

    Qiang Yao, Toshiaki Fujii

        page: I-028   2012.9

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  106. {超解像による仮想視点画像の生成

    劉 美辰,パナヒプル・テヘラニ・メヒルダド,藤井俊彰,谷本正幸

    平成24年度電気関係学会東海支部連合大会     page: K3-2   2012.9

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  107. {前進視点位置における自由視点画像生成

    伊藤 光,メヒルダド・パナヒプル・テヘラニ, 藤井俊彰, 谷本正幸

    平成24年度電気関係学会東海支部連合大会     page: K3-8   2012.9

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  108. {超解像度を利用したFTV画像生成方式

    劉 美辰, メヒルダド・パナヒプル・テヘラニ, 藤井俊彰, 谷本正幸

    第11回情報科学技術フォーラム     page: I-012   2012.9

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  109. {SFM を用いた動く物体の時間方向に連続した構造の作成に関する基礎研究

    大矢宗平, 藤井俊彰

    平成24年度電気関係学会東海支部連合大会     page: K3-6   2012.9

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  110. {3Dワーピングを用いた仮想視点画像生成における適応的ホール処理

    森 達郎, メヒルダド・パナヒプル・テヘラニ, 藤井俊彰, 谷本正幸

    平成24年度電気関係学会東海支部連合大会     page: K3-1   2012.9

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  111. {Sparse Representation of Epipolar Plane Image by Overcomplete Dictionary

    Qiang YAO, Toshiaki Fujii

        page: K3-7   2012.9

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  112. Traffic Sign Recognition with Invariance to Lighting in Dual-Focal Active Camera System Reviewed

    Yanlei Gu,, Mehrdad Panahpour Tehrani, Tomohiro Yendo, Toshiaki Fujii, Masayuki Tanimoto

    IEICE Transactions on Information and Systems   Vol. E95-D ( 7 ) page: 1775-1790   2012.7

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  113. {Traffic Sign Recognition with Invariance to Lighting in Dual-Focal Active Camera System

    Yanlei Gu and Mehrdad Panahpour Tehrani and Tomohiro Yendo and Toshiaki Fujii and Masayuki Tanimoto

    IEICE Transactions on Information and Systems   Vol. E95-D ( 7 ) page: 1775-1790   2012.7

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  114. {円形カメラアレイにおける光線空間の圧縮センシング

    臼井俊亮,Mehrdad Panahpour Tehrani,藤井俊彰,谷本正幸

    3次元画像コンファレンス2012     page: 184--187   2012.7

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  115. {3Dワーピングを用いた自由視点画像生成により生じるホールに対する適応的処理

    森達郎,Mehrdad Panahpour Tehrani,藤井俊彰,谷本正幸

    3次元画像コンファレンス2012     page: 86--89   2012.7

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  116. {Ray-space acquisition system for 3DTV

    Toshiaki Fujii

    SPIE 2012 Defense Security and Sensing     page: 346--359   2012.4

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  117. High-quality Virtual View Synthesis in 3DTV and FTV Reviewed

    Lu Yang, Mehrdad Panahpour Tehrani, Toshiaki Fujii, Masayuki Tanimoto

    3D Research   Vol. 2 ( 4 ) page: 1-13   2011.12

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  118. カメラと鏡を用いた多点光線取得システム Reviewed

    深見遼, 福嶋慶繁, 圓道知博, メヒルダド パナヒプル テヘラニ, 藤井俊彰, 谷本正幸

    電子情報通信学会論文誌D   Vol. J94-D ( 12 ) page: 1989-1991   2011.12

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  119. 前進視点における自由視点画像生成 Reviewed

    安藤建吾, 福嶋慶繁, 圓道知博, メヒルダド パナヒプル テヘラニ, 藤井俊彰, 谷本正幸

    電子情報通信学会論文誌D   Vol. J94-D ( 12 ) page: 2000-2003   2011.12

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  120. Traffic Sign Recognition Using Hybrid Camera System Reviewed

    Yanlei Gu, Tomohiro Yendo, Mehrdad Panahpour Tehrani, Toshiaki Fujii, Masayuki Tanimoto

    The Journal of The Institute of Image Information and Television Engineers   Vol. 65 ( 7 ) page: 967-975   2011.7

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  121. Traffic Sign Detection in Dual-Focal Active Camera System

    Yanlei Gu, Tomohiro Yendo, Mehrdad Panahpour Tehrani, Toshiaki Fujii, Masayuki Tanimoto

    2011 IEEE Intelligent Vehicles Symposium     page: 1054-1059   2011.6

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  122. Global Viwe and Depth Format for FTV Reviewed

    Takashi Ishibashi, Tomohiro Yendo, Mehrdad Panahpour Tehrani, Toshiaki Fujii, Masayuki Tanimoto

    Collaborative Conference on 3D & Materials Research (3DMR) 2011     page: 3D Research Session II   2011.6

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  123. Depth Up-sampling for Depth Coding using View Information Reviewed

    Menno.O. Wildeboer, Toshiihro Yendo, Mehrdad Panahpour Tehrani, Toshiaki Fujii, Masayuki Tanimoto

    3DTVcon     page: CD   2011.5

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  124. Depth Coding using Down-sampling and View based Up-sampling Reviewed

    Menno.O. Wildeboer, Toshiihro Yendo, Mehrdad Panahpour Tehrani, Toshiaki Fujii, Masayuki Tanimoto

    The Journal of The Institute of Image Information and Television Engineers   Vol. 65 ( 4 ) page: 497-504   2011.4

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  125. Free-viewpoint Image Generation from a Video Captured by a Handheld Camera

    Kota Takeuchi, Norishige Fukushima, Tomohiro Yendo, Mehrdad Panahpour Tehrani, Toshiaki Fujii, and Masayuki Tanimoto

    Proc. of SPIE   Vol. 7863   page: 78631N1-1-9   2011.1

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  126. Multiview Image Compression Based on a New Basis Representation Reviewed

    Takehiro Yamada, Toshiaki Fujii

    IS&T/SPIE Electronic Imaging   Vol. 7863 ( 78630E ) page: 1-8   2011.1

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  127. High-Spec Multiview Image Capturing System Using Wireless Network Reviewed

    Takayuki Tamaru, Takehiro Yamada, Toshiaki Fujii

    International Workshop on Advanced Image Technology 2011     page: O.II.3-3, 2011.1   2011.1

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  128. A New Basis Representation for Multiview Image Reviewed

    Takehiro Yamada, Toshiaki Fujii

    International Workshop on Advanced Image Technology     page: O.II.1-1   2011.1

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  129. Reducing Bitrates of Compressed Video with Enhanced View Synthesis for FTV

    Lu Yang, Meindert Onno Wildeboer, Tomohiro Yendo, Mehrdad Panahpour Tehrani, Toshiaki Fujii, Masayuki Tanimot

    Picture Coding Symposium(PCS2010)     page: 5-8   2010.12

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  130. A New Basis Representation for Multiview Image Reviewed

    Takehiro Yamada, Toshiaki Fujii

    Workshop on Picture Coding and Image Processing     page: 145-146   2010.12

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  131. View Synthesis Using Probabilistic Reliability Reasoning for FTV

    Lu Yang, Tomohiro Yendo, Mehrdad Panahpour Tehrani, Toshiaki Fujii, Masayuki Tanimoto

    The Journal of The Institute of Image Information and Television Engineers   Vol. 64 ( 11 ) page: 1671-1677   2010.11

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  132. A Semi-Automatic Depth Estimation Method for FTV Reviewed

    Meindert Onno Wildeboer, Norishige Fukushima, Tomohiro Yendo, Mehrdad Panahpour Tehrani, Toshiaki Fujii, Masayuki Tanimoto

    The Journal of The Institute of Image Information and Television Engineers   Vol. 64 ( 11 ) page: 1678-1684   2010.11

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  133. Probabilistic reliability based view synthesis for FTV

    Lu Yang, Tomohiro Yendo, Mehrdad Panahpour Tehrani, Toshiaki Fujii, Masayuki Tanimoto

    Proc. of IEEE International Conference on Image Processing     page: pp.1785-1788   2010.9

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  134. The Seelinder: Cylindrical 3D display viewable from 360 degrees Reviewed

    Tomohiro Yendo, Toshiaki Fujii, Masayuki Tanimoto, and Mehrdad Panahpour Tehrani

    Journal of Visual Communication and Image Representation   Vol. 21 ( 5-6 ) page: 586-594   2010.8

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  135. 自然特徴点を用いた多視点画像の平行化 Reviewed

    蔦岡拓也, 藤井俊彰

    3次元画像コンファレンス2010     page: 171-181   2010.7

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  136. A semi-automatic multi-view depth estimation method

    ]Meindert Onno Wildeboer, Tomohiro Yendo, Norishige Fukushima, Mehrdad Panahpour Tehrani ,Toshiaki Fujii, Masayuki Tanimoto

    Visual Communications and Image Processing 2010   Vol. 7744 ( 54 ) page: CD   2010.7

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  137. Artifact reduction using reliability reasoning for image generation of FTV Reviewed

    Lu Yang, Tomohiro Yendo, Mehrdad Panahpour Tehrani, Toshiaki Fujii, Masayuki Tanimoto

    Journal of Visual Communication and Image Representation   Vol. 21 ( 5-6 ) page: 542-560   2010.7

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  138. A New Basis Representation for Multiview Image Using Directional Sampling Reviewed

    Takehiro Yamada, Toshiaki Fujii

    The 17th International Display Workshop     page: 1309-1312   2010.7

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  139. 無線ネットワークを利用した高機能多視点動画像撮影システムの構築 Reviewed

    田丸貴行, 山田健弘, 藤井俊彰

    3次元画像コンファレンス2010     page: 125-128   2010.7

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  140. 方向付サンプリングを用いた多視点画像の基底表現に関する検討 Reviewed

    山田健弘, 藤井俊彰

    3次元画像コンファレンス2010     page: 79-82   2010.7

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  141. 低解像度画像の統合による高解像度自由視点画像の生成 Reviewed

    川鍋翔太, 藤井俊彰

    3次元画像コンファレンス2010     page: 186-189   2010.7

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  142. Ray-Space Acquisition Systems for 3D TV - 100-Camera and Ray-Based Acquisition Systems Reviewed

    Toshiaki Fujii

    ASIAGRAPH 2010   Vol. 4 ( 1 ) page: 181-186   2010.6

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  143. A New Vision System for Traffic Sign Recognition

    Yanlei Gu, Tomohiro Yendo, Mehrdad Panahpour Tehrani, Toshiaki Fujii, and Masayuki Tanimoto

    Proc. of 2010 IEEE Intelligent Vehicles Symposium     page: CD   2010.6

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  144. High-speed-camera Image Processing Based LED Traffic Light Detection for Road-to-vehicle Visible Light Communication Reviewed

    H. Chinthaka N. Premachandra, Tomohiro Endo, Mehrdad Panahpour Tehrani, Takaya Yamasato, Hiraku Okada, Toshiaki Fujii, and Masayuki Tanimoto

    Proc. of 2010 IEEE Intelligent Vehicles Symposium     page: CD   2010.6

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  145. Free Viewpoint Image Generation Using Graph Cuts

    Lu Yang, Tomohiro Yendo, Mehrdad Panahpour Tehrani, Toshiaki Fujii, and Masayuki Tanimoto

    International Workshop on Advanced Image Technology (IWAIT 2010)   ( 131 ) page: #   2010.1

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  146. 360-degree Dense Multiview Image Aqcuisition System Using Time Multiplexing

    Tomohiro Yendo, Toshiaki Fujii, Mehrdad Panahpour Tehrani, and Masayuki Tanimoto

    Proc. of SPIE Stereoscopic Displays and Applications XXI     page: 7524-52   2010.1

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  147. Novel View Synthesis with Residual Error Feedback for FTV

    Hisayoshi Furihata, Tomohiro Yendo, Mehrdad Panahpour Tehrani, Toshiaki Fujii, and Masayuki Tanimoto

    Proc. of SPIE Stereoscopic Displays and Applications XXI     page: 7524-19   2010.1

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  148. Static Scene FTV using Handy Camera

    Kota Takeuchi, Norishige Fukushima, Tomohiro Yendo, Mehrdad Panahpour Tehrani, Toshiaki Fujii, and Masayuki Tanimoto

    International Workshop on Advanced Image Technology(IWAIT 2010)   ( 187 ) page: #   2010.1

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  149. View Generation by Canceling Residual Error for FTV

    Hisayoshi Furihata, Tomohiro Yendo, Mehrdad Panahpour Tehrani, Toshiaki Fujii, and Masayuki Tanimoto

    International Workshop on Advanced Image Technology(IWAIT 2010)   ( 144 ) page: #   2010.1

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  150. Depth Estimation for Moving Multiple Camera Array

    Meindert Onno Wildeboer, Tomohiro Yendo, Mehrdad Panahpour Tehrani, Toshiaki Fujii,and Masayuki Tanimoto

    International Workshop on Advanced Image Technology (IWAIT 2010)   ( 142 ) page: #   2010.1

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  151. Edge-Based Tracking of an LED Traffic Light for a Road-to-Vehicle Visible Light Communication System

    H.Chinthaka N. Premachandra, Tomohiro Yendo, Mehrdad Panahpour Tehrani, Takaya Yamasato, Toshiaki Fujii, Masayuki Tanimoto, and Yoshikatsu Kimura

    Journal of Broadcast Engineering published by KoSBE, the Korean Society for Broadcast Engineers   Vol. 14 ( 4 ) page: 475-487   2009.7

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  152. Tracking of LED Traffic Light for Read-to-Vehicle Communication System

    H. Chinthaka N. Premachandra, Tomohiro Yendo, Mehrdad Panahpour Tehrani, Takaya Yamazato, Hiraku Okada, Toshiaki Fujii, Masayuki Tanimoto and Yoshikatsu Kimura

    Society of Automotive Engineers of Japan(JSAE) Annual Congress Proceedings   Vol. Fall ( 93-09 ) page: #   2009.7

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  153. Detection of LED Traffic Light by Image Processing for Visible Light Communication System

    H. Chinthaka N. Premachandra, Tomohiro Endo, Takaya Yamasato, Toshiaki Fujii, Masayuki Tanimoto, and Yoshikatsu Kimura

    Proc. of 2009 IEEE Intelligent Vehicles Symposium     page: CD   2009.6

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  154. On-Vehicle Receiver for Distant Light Road-to-Vehicle Communication

    Satoshi Okada, Tomohiro Yendo, Takaya Yamazato, Toshiaki Fujii, Masayuki Tanimoto, and Yoshikatsu Kimura

    Proc. of 2009 IEEE Intelligent Vehicles Symposium     page: CD   2009.6

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  155. Ray-space Interpolation by Warping Disparity Maps

    Yuji Mori, Tomohiro Yendo, Masayuki Tanimoto, Toshiaki Fujii

    Proc. of IWAIT2009     page: #0029   2009.1

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  156. Compressive Acquisition of Ray-space Using Radon Transform

    Keiji Yamashita, Tomohiro Yendo, Toshiaki Fujii, Masayuki Tanimoto

    Proc. of SPIE Stereoscopic Displays and Virtual Reality Systems XVI     page: 7237-43   2009.1

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  157. View Generation with 3D Warping Using Depth Information for FTV

    Yuji Mori, Norishige Fukushima, Tomohiro Yendo, Toshiaki Fujii and Masayuki Tanimoto

    Signal Processing: Image Communication   Vol. 24 ( 1-2 ) page: 65-72   2009.1

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  158. 3DAV Integrated System Featuring Arbitrary Listening-point and Viewpoint Generation

    Mehrdad Panahpour Tehrani, Kenta Niwa, Norishige Fukushima, Yasushi Hirano, Toshiaki Fujii, Masayuki Tanimoto, Kazuya Takeda, Kenji Mase, Akio Ishikawa, Shigeyuki Sakazawa, Atsushi Koike

    Proc. of MMPS2008     page: PID-213   2008.10

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  159. 路車間可視光通信のための高速画像処理受信システム Reviewed

    岩崎 真也,圓道 知博, 藤井 俊彰, 谷本 正幸

    電子情報通信学会論文誌D   Vol. J91-D ( 8 ) page: 2024- 2025   2008.8

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  160. 多視点・多聴点データ取得システムを用いた自由視聴点映像生成

    福嶋 慶繁,丹羽 健太,圓道 知博, 藤井 俊彰, 谷本 正幸, 西野 隆典, 武田 一哉

    電子情報通信学会論文誌D   Vol. J91-D ( 8 ) page: 2039- 2038   2008.8

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  161. View Generation by Ray-space Method in Circular Camera Setup for FTV

    Takeshi Uemori, Tomohiro Yendo, Toshiaki Fujii and Masayuki Tanimoto

    Proc. of 3DTV-CON2008     page: 233-236   2008.5

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  162. View Generation with 3D Warping Using Depth Information For FTV

    Yuji Mori, Norishige Fukushima, Toshiaki Fujii and Masayuki Tanimoto

    Proc.of 3DTV-CON2008     page: 229-232   2008.5

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  163. 特徴点軌跡並行化による2 次元カメラアレイレクティフィケーション

    福嶋 慶繁, 松本 健太郎,圓道 知博, 藤井 俊彰, 谷本 正幸

    映像情報メディア学会誌   Vol. 61 ( 4 ) page: 564-571   2008.4

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  164. New 3D display using lens array and depth division images

    Akira TakeichiTomohiro YendoToshiaki FujiiMasayuki Tanimoto

    SPIE ITCom 2007   Vol. 3D Display   2007.9

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  165. Ray-Space Acquisition System of All-Around Convergent Views using a Rotation Mirror

    Keisuke ManohTomohiro YendoToshiaki FujiiMasayuki Tanimoto

    SPIE ITCom 2007   Vol. 3D Display   2007.9

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  166. Time-multiplexing 3D display using fast light shutter

    Junya YamamotoTomohiro YendoToshiaki FujiiMasayuki Tanimoto

    SPIE ITCom 2007   Vol. 3D Display   2007.9

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  167. 自然特徴点を用いたマルチカメラ画像の幾何補正 Reviewed

    松本健太郎, 圓道 知博, 藤井 俊彰, 谷本 正幸

    電子情報通信学会論文誌   Vol. J90-D ( 7 ) page: 1718-1720   2007.7

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  168. Multi-Pass Dynamic Programming による光線空間補間 Reviewed

    福嶋慶繁, 圓道 知博, 藤井 俊彰, 谷本 正幸

    電子情報通信学会論文誌D   Vol. J90-D ( 7 ) page: 1721-1725   2007.7

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    本論文では,光線空間補間における対応点探索の問題に対し,
    動的計画法を2パスで適用することにより効率よく求める
    手法を提案している.2次元のDPを適用することは困難と考え
    られていたが,本手法によりそれが可能になったとして
    高い評価を得ている.

  169. A New Receiving System of Visible Light Communication for ITS

    Toshiki HaraTomohiro YendoToshiaki FujiiMasayuki Tanimoto

    IEEE Intelligent Vehicles Symposium 2007     page: 474-479   2007.6

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  170. Basic Experiments for Parallel Wireless Optical Communication for ITS

    Shinya IwasakiTomohiro YendoToshiaki FujiiMasayuki Tanimoto

    IEEE Intelligent Vehicles Symposium 2007     page: 321-326   2007.6

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  171. Free Viewpoint Image Generation Synchronized with Free Listeningpoint Audio for 3-D Real Space Navigation

    Norishige FukushimaTomohiro YendoToshiaki FujiiMasayuki Tanimoto

    3DTV-Conderence2007     page: 121   2007.5

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  172. RAY-SPACE CODING USING SINUSOIDAL STRUCTURE IN CIRCULAR CAMERA ARRANGEMENT

    Shinji Kimura, Toshiaki Fujii, Masayuki Tanimoto

    Proc. of IWAIT2006     page: -   2006.1

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  173. Free Viewpoint Image Generation from Handheld-Camera Sequence

    Kentaro Matsumoto, Toshiaki Fujii, Masayuki Tanimoto

    Proc. of IWAIT2006     page: -   2006.1

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  174. See-Through Vehicles -Driving Assistance at an Intersection using an Infrastructure Camera-

    Takeshi Nakanishi, Toshiaki Fujii, Masayuki Tanimoto

    Proc. of IWAIT2006     page: -   2006.1

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  175. Multipoint Measuring System for Video and Sound - 100-camera and microphone system- Invited

    Toshiaki Fujii, et al.

    Third IMI-COE Symposium     page: -   2005.12

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  176. Multiview Interpolaton for Ray-Space Coding

    Koji Yamanaka, Toshiaki Fujii, Masayuki Tanimoto

    Proc.of SPIE Three-Demensional TV, Video, and Display IV   Vol. 6016   page: 60160D-1-60160D-10   2005.10

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  177. Compression of Multi-camera Images Considering their Features

    Kenji Yamamoto, Toshiaki Fujii, Masayuki Tanimoto

    Proc. of Forum on Information Technology 2005     page: 195-198   2005.9

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  178. Assistance for Right Turn in an Intersection using an Infra Camera

    Takeshi Nakanishi, Toshiaki Fujii, Masayuki Tanimoto

    Proc. of Tokai-Section Joint Conferences of Electrical and Related Engineers 2005     page: -   2005.9

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  179. Synthesis of Arbitrary View Images from Handheld Camera Sequence

    Kentaro Matsumoto, Toshiaki Fujii, Masayuki Tanimoto

    Proc. of Tokai-Section Joint Conferences of Electrical and Related Engineers 2005     page: -   2005.9

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  180. Occlusion Detection using Multi-view Image in Ray-Space Interpolation

    Koji Yamanaka, Toshiaki Fujii, Masayuki Tanimoto

    Proc. of Tokai-Section Joint Conferences of Electrical and Related Engineers 2005     page: -   2005.9

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  181. Ray-Space Construction of City Scene by Iterated Capturing

    Ryuji Takano, Toshiaki Fujii, Masayuki Tanimoto

    Proc. of Tokai-Section Joint Conferences of Electrical and Related Engineers 2005     page: -   2005.9

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  182. Ray-Space Interpolation based on Stereoscopic System

    Yaser Jazouane, Toshiaki Fujii, Masayuki Tanimoto

    Proc. of Tokai-Section Joint Conferences of Electrical and Related Engineers 2005     page: -   2005.9

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  183. Two approaches for Multi-camera Images Compression by using H.264/AVC

    Kenji Yamamoto, Toshiaki Fujii, Masayuki Tanimoto

    Proc. of Tokai-Section Joint Conferences of Electrical and Related Engineers 2005     page: -   2005.9

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  184. Synthesizing Wide-angle and Arbitrary Viewpoint Based on Ray-Space

    Norishige Fukushima, Toshiaki Fujii, Masayuki Tanimoto

    Proc. of Tokai-Section Joint Conferences of Electrical and Related Engineers 2005     page: -   2005.9

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  185. Real-time synthesis of wide-angle and arbitrarily viewpoint image based on Ray-Space

    Norishige Fukushima, Toshiaki Fujii, Masayuki Tanimoto

    Proc. the 10th Conferences of Virtual Reality Society of Japan     page: -   2005.9

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  186. An Optical Analysis of Reception Characteristic for Parallel Optical Wireless Communication System

    Mitsuhiro Wada, Toshiaki Fujii, Masayuki Tanimoto

    Proceedings of the 2005 IEICE Society Conference     page: 208-   2005.9

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  187. Driver Assistance for Right Turn in an Intersection Based on Infra Camera Image

    Takeshi Nakanishi, Toshiaki Fujii, Masayuki Tanimoto

    Proceedings of the 2005 IEICE Society Conference     page: -   2005.9

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  188. An Optical Analysis of Parallel Channels in Optical Wireless Communication System

    Mitsuhiro Wada, Toshiaki Fujii, Masayuki Tanimoto

    Proc. of Tokai-Section Joint Conferences of Electrical and Related Engineers 2005     page: -   2005.9

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  189. Parking assistance using images of cameras set as infrastructures

    Yasuhiro Suzuki, Toshiaki Fujii, Masayuki Tanimoto

    Proc. of Tokai-Section Joint Conferences of Electrical and Related Engineers 2005     page: -   2005.9

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  190. Realtime System of Free Viewpoint Television Reviewed

    Purim Na BangchangMehrdad Panahpour TehraniToshiaki FujiiMasayuki Tanimoto

    The journal of the institute of Image Information and Television Engineers   Vol. 59 ( 8 ) page: 1191-1198   2005.8

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  191. A Ray-Based Real-time System of Arbitrary View-point

    Norishige Fukushima, Toshiaki Fujii, Masayuki Tanimoto

    Proc. of 3D Image Conference 2005     page: 25-28   2005.7

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  192. Ray-Space Interpolation for Free Viewpoint Generation

    Yaser Jazouane, Toshiaki Fujii, Masayuki Tanimoto

    Proceedings SIGGRAPH 2005     page: -   2005.7

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  193. Parking Assistance using Multi-Camera Infrastructure

    Yasuhiro Suzuki, Toshiaki Fujii, Masayuki Tanimoto

    Proc. of IEEE Intelligent Vehicles Symposium     page: 106-111   2005.6

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  194. Road-to-Vehicle Communication Using LED Traffic Light

    Mitsuhiro Wada, Toshiaki Fujii, Masayuki Tanimoto

    Proc. of IEEE Intelligent Vehicles Symposium     page: 600-605   2005.6

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  195. Visual Assistant System "HIR" for Safe Driving at an Intersection -Intelligent Intersection-

    Masato Koyamaishi, Mitsuhiro Wada, Tomohiro Yendo, Toshiaki Fujii, Masayuki Tanimoto

    Proc. of RWCinME2005     page: 25-32   2005.4

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  196. A New Flexible Acquisition System of Ray-Space Data for Arbitrary Objects

    IEEE Trans. on Circuits and Systems for Video Technology   Vol. 10 ( 2 ) page: 218-224   2000

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  197. Interpolation of Ray-Space Data by Adaptive Filtering

    IS&T/SPIE Electronic Imaging 2000   Vol. 3958   2000

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  198. The Hierarchical Ray Space for 3-D Imaging

    EVA 2000 Florence   Vol. 1   2000

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  199. Bit Allocation in the Transform Coding of Hologram Patterns(共著)

    SPIE Electronic Imaging '99     page: 3637-24   1999

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  200. Interpolation of Ray-Space Data Using Adaptive Filters

    Proceedings of The 1999 IEICE General Conference   Vol. D-11-145 ( 情報システム2 ) page: 145   1999

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  201. Data Compression of 3-D Spatial Information Based on Ray-Space Coding

      Vol. 10.3   page: 45-49   1999

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  202. A New Acquisition System of Arbitrary Ray-Space(共著)

    SPIE Electronic Imaging '99     page: 3639-35   1999

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  203. 多視点画像からの光線データ補間に関する基礎検討

    電気関係学会 東海支部連合大会     page: 337   1999

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  204. 光線空間データのための適応フィルタ補間

    平成11年度電気関係学会東海支部連合大会     page: 273   1999

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  205. 3次元映像次元メディアの情報論と信号処理

    平成11年度電気関係学会東海支部連合大会     page: S75-S76   1999

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  206. 光線空間の自己相関関数の定式化の試み

    1999年映像メディア処理シンポジウム     page: 31-32   1999

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  207. 適応フィルタを用いた光線空間データ補間

    3次元画像コンファレンス'99     page: 25-30   1999

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  208. 簡易形状モデルと光線情報マッピングを用いた3次元画像生成

    3次元画像コンファレンス'99     page: 19-30   1999

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  209. Ray-Space Coding Based on Arbitrary-Shaped DCT (共著)

    SPIE Electronic Imaging '98   Vol. 3295   page: 258-268   1998

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  210. A New Ray-Space Method for 3-D Spatial Information Processing and Handling (共著)

    EVA-GIFU '98     page: (19-1)-(19-11)   1998

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  211. Data Compression of 3-D Spatial Information Based on Ray-Space Coding

    The Journal of The Institute of Image Information and Television Engineers   Vol. 52-3   page: 356-363   1998

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  212. Transform Conding of Hologram Patterns by Considering Reproduction Process

    Technical Report of IEICE   Vol. C98-130 ( 482 ) page: 111-117   1998

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

  213. Fractal Image Coding Based on Classified Range Regions(共著)

    IEICE Transactions of Communications   Vol. E-81-B   page: 12   1998

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  214. 3D Visual Media

        page: 11-16   1998

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  215. A Formulation of the Statistical Properties of Ray-Space Data

    Image Media Processing Symposium '98   Vol. (]G0001[)-4.09   page: 65-66   1998

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  216. Improved Algorithm and Experiment for Real-Time Integration of Multi-Camera Image Data

    Proceedings of The 1998 Information and Systems Society Conference of IEICE   Vol. D-(]G0002[)   page: 209   1998

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  217. Generation of Dense Ray-Space Data fro Multi-Viewpoint Image Set

    Record of 1998 Tokai-Section Joint Conference of the Seven Institutes of Electrical and Related Engineers     page: 337   1998

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  218. Importance of High Order Transform Coefficients in Data Compression of Hologram Patterns

    Proceedings of the 1998 ITE Annual Convention     page: 232-233   1998

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  219. A New Ray-Space Method for 3-D Spatial Information Processing and Handling(共著)

    EVA-GIFU '98     page: (19-1)-(19-11)   1998

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  220. Synthesis of Virtual-Lighting Images from Finite Number of Illumination-Controlled Images

    Proceedings of The 1998 IEICE General Conference   Vol. 2   page: 150   1998

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  221. Ray-Space Representation for 3-D Image Contents and Its Application

    Proceedings of The 1998 IEICE General Conference   Vol. 1   page: 416-417   1998

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  222. Ray Space Representation for 3-D Image Processing(共著)

    SPIE Electronic Imaging'97     page: 3012   1997

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  223. A Study on Image Capturing System for Synthesis of Images on Various Illuminating Conditions

        page: 2-4   1997

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  224. Ray Space Coding Based on Disparity Compensation

    Image Media Processing Symposium     page: 55-56   1997

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  225. Ray-Space Data with Illuminating Conditions

    Proceedings of The 1997 Information and Systems Society Conference of IEICE     page: 164   1997

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  226. Segmentation-based Approach for Coding of the Ray Space Data with Vertical Parallax

    3D Image Conference '97     page: 138-143   1997

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  227. A Study on Arrangement of Cameras for All-around Images

    The 1997 IEICE General Conference   ( 2 ) page: 179   1997

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  228. Ray Space Coding for 3D Visual Communication(共著)

    Picture Coding Symposium '96   Vol. 2   page: 447-451   1996

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  229. Compression of 3D Space Information based on the Ray Space Representation

    3D Image Conference '96     page: 1-6   1996

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  230. A Study on Redundancy in Ray Representation of 3D Object

    The 1997 IEICE General Conference   ( 2 ) page: 197   1996

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  231. 3-D Image Coding based on Ray Space Representation(共著)

    The Third International Display Workshops     page: 461-464   1996

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  232. A New Approach for 3-D Image Generation Based on Ray Parameter Representation

    1996 Tokai-Section Joint Conference of The Six Institutes of Electrical and Related Engineers     page: 399   1996

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  233. Reconstruction of Ray Space Data from Occlusion Data

    The 1st Image Media Processing Symposium     page: 103-104   1996

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  234. A Study on Vector Field Representation of Ray Parameter Space

    The 1996 Society Conference of IEICE     1996

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  235. A Study on Statistical Characteristic of Ray Space Data

    1996 The Institute of Television Engineers of Japan Annual Convention     page: 102-103   1996

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  236. Representation of 3D Spatial Information by Rays and Its Application

    The Journal of The Institute of Television Engineers of Japan   Vol. 50 ( 9 ) page: 1312-1318   1996

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  237. A New Scheme for Representing the Information of 3D Space Using Ray Parameters

      Vol. 95 ( 436 ) page: 13-18   1995

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  238. Transformation of Hologram and Ray Space for Integrated 3D Visual Communication

    1995年3次元画像コンファレンス     page: 220-225   1995

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  239. Coding of Holographic 3D Image based on Transformation of Hologram and Ray Space

        page: 101-102   1995

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  240. Data Compression and Interpolation of Multi-View 3D Image Based on3D Structure Estimation

        page: 25-31   1994

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  241. Data Compression and Interpolation for an Autostereoscopic 3-DImage(共著)

    Picture Coding Symposium'94     page: 13,01   1994

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  242. Data Compression of an Autostereoscopic 3-D Image(共著)

    SPIE Stereoscopic Displays and Applications   Vol. 2177   page: 108-118   1994

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  243. Data Compression and Interpolation of Multi-View Image Set(共著)

    IEICE Transactions on Information and Syserms   Vol. E77-D ( 9 ) page: 987-995   1994

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  244. 3-D Image Coding Based on Affine Transform(共著)

    1994 International Conference on Acoustic Speech and Signal Processing     page: V577-V583   1994

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  245. Coding of an Autostereoscopic 3-D Image Sequence(共著)

    SPIE Visual Communications and Image Processing   Vol. 2308   page: 930-941   1994

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  246. Coding of 3D Image Based on Structure Estimation

        page: 23-24   1994

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  247. Coding of Multi-View3D Image -From Disparity Compensation to Structure Estimation Coding-

        page: 153-154   1993

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  248. Integrated 3D Visual Communication

      Vol. HC92 ( 58 ) page: 1-9   1993

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  249. Data Compression for an Autostereoscopic 3-D Image(共著)

    Picture Coding Symposium'93     page: 13,21   1993

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▼display all

Presentations 11

  1. Ray-Space Acquisition System for 3DTV 100-Camera and Ray-Based Acquisition Systems International conference

    Toshiaki Fujii

    International Universal Communication Symposium (IUCS) 2011 

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    Event date: 2011.10

    Language:English   Presentation type:Oral presentation (general)  

  2. Free Viewpoint Television International conference

    Toshiaki Fujii

    Workshop on 3D Imaging 

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    Event date: 2011.1

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:United States  

  3. 多視点映像撮影システム International conference

    URCF映像作業班

    CEATEC 

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    Event date: 2010.10

    Language:Japanese  

    Venue:幕張   Country:Japan  

  4. 3D Visual Communication using Ray-Space Representation International conference

    Toshiaki Fujii

    Multi-viewpoint image acquisition and utilization Workshop 

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    Event date: 2010.9

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:United States  

  5. Multiview Image Capturing System International conference

    Three Dimensional Systems and Applications (3DSA)  

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    Event date: 2010.5

    Language:English  

    Country:Japan  

  6. New 3D display using lens array and depth division images International conference

    SPIE ITCom 2007 

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    Event date: 2007.9

    Language:English   Presentation type:Oral presentation (general)  

  7. Ray-Space Acquisition System of All-Around Convergent Views using a Rotation Mirror International conference

    SPIE ITCom 2007 

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    Event date: 2007.9

    Language:English   Presentation type:Oral presentation (general)  

  8. Time-multiplexing 3D display using fast light shutter International conference

    SPIE ITCom 2007 

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    Event date: 2007.9

    Language:English   Presentation type:Oral presentation (general)  

  9. A New Receiving System of Visible Light Communication for ITS International conference

    IEEE Intelligent Vehicles Symposium 2007 

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    Event date: 2007.6

    Language:English   Presentation type:Poster presentation  

  10. Basic Experiments for Parallel Wireless Optical Communication for ITS International conference

    IEEE Intelligent Vehicles Symposium 2007 

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    Event date: 2007.6

    Language:English   Presentation type:Poster presentation  

  11. Free Viewpoint Image Generation Synchronized with Free Listeningpoint Audio for 3-D Real Space Navigation International conference

    3DTV-Conderence2007 

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    Event date: 2007.5

    Language:English   Presentation type:Poster presentation  

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KAKENHI (Grants-in-Aid for Scientific Research) 5

  1. 空中像を用いた広視域ライトフィールドカメラとリアルな3次元映像技術の開拓

    Grant number:22H03619  2022.4 - 2025.3

    科学研究費助成事業  基盤研究(B)

    河北 真宏, 山本 裕紹, 藤井 俊彰, 村木 祐太, 河合 紀彦

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    Authorship:Coinvestigator(s) 

    本研究では、撮影対象の3次元物体から発せられる光線情報を広い角度範囲で取得できる簡易なライトフィールドカメラを開発する。3次元物体を光学プレートで空中像として結像し、レンズアレイを介して単一カメラで撮影する手法を提案する。本方式により、従来技術の30倍以上の角度(30度以上の視域角度)範囲で光線情報を取得することを目標とする。また、得られた光線情報をもとに、3次元映像のリアルタイム撮影・表示や3次元映像表示の広視域化、リアルな3Dモデルの生成とAR/VR映像への応用など、高度な3次元映像技術を実現する。
    本研究課題の学術的「問い」は、ライトフィールド(LF)技術の進化により、光線情報が持つ3次元情報を効果的に活用して、新しい映像研究の流れを創造することである。本研究では、3次元物体を空中像として結像してレンズアレイを介して撮影することで、単一カメラによる撮影でも30度以上の角度範囲で光線情報を得ることができるLFカメラを開発する。また、その光線情報をもとに、3次元映像のリアルタイム撮影・表示や広視域表示、リアルな3Dモデル生成とAR/VR映像への応用など、高度な映像技術の実現を目指す。
    研究項目(A)「広視域ライトフィールドカメラの開発」では、提案する撮像方式の原理検証を実施した。実験では、被写体の空中像を再帰性反射光学素子により形成し、その像結像位置にレンズアレイを設置してカメラで要素映像を撮影した。実験により撮影可能な3次元映像の解像度特性や光線の取得角度を求め、想定通りに光線取得できることを実証した。また、空中像のゴースト光が光線取得の妨害となる課題については、再帰性反射光学素子への入射光線角度を光学フィルムで制限することで改善した。また、実験結果をもとに、30度以上の広角度の光線を取得できる専用の新規レンズアレイを設計して、年度内に試作を完了させた。
    研究項目(B)「3次元映像表示の高機能化」(B-1)「リアルタイム表示」については、撮像系とインテグラル3D表示系を試作して撮影・表示実験を実施した。その結果、インテグラル3D映像のリアルタイム撮影と表示に成功した。(B-2)「広視域化」については、実験で得られた要素映像を、積層型ディスプレイ用映像への変換方法の開発を進めた。
    研究項目(C)「3次元モデリングとAR/VRへの応用」では、実験で得られた映像データをもとに、必要となる映像処理技術を検討し、微小レンズに対応する要素映像の抽出や幾何補正技術などの開発を進めた。
    研究項目(A)「広視域ライトフィールドカメラの開発」では、当初の予定通りに原理検証実験を行い、提案方式の基本特性測定と課題の抽出、基本原理の実証ができた。この成果を踏まえ、目標とする光線角度30度を実現するためのレンズアレイの設計と試作を完了できた。研究項目(B)「3次元映像表示の高機能化」(B-1)「リアルタイム表示」に関しては、当初の研究計画よりも早期にインテグラル3D映像のリアルタイム撮影と表示を実験で示すことに成功した。研究項目(B-2)「広視域化」と(C)「3次元モデリングとAR/VRへの応用」に関しても映像処理技術の検討を進めるとともに、当初の予定通りに新規レンズアレイの設計・試作が2022年度に完了したことで、次年度から基礎実験を実施できる環境が整った。
    2022年度に提案方式に最適化した専用の新規レンズアレイの試作が完了できたため、2023年度に実験により目標とする角度範囲30度の光線情報撮影を実験で達成する。また、空中像の形成光学系の最適化も進め、撮影性能の向上に取り組む。リアルタイムの3D撮影・表示技術に関しては、新規レンズアレイや高精細映像の適用により映像品質を向上するとともに、具体的な応用を想定した実験も進めていく。また、新規レンズアレイを用いて、積層型の3次元映像の広視域化や3次元形状計測、AR/VR映像生成などの高度な3次元映像技術に関する基礎実験に取り組んでいく。

  2. 空中像を用いた広視域ライトフィールドカメラとリアルな3次元映像技術の開拓

    Grant number:23K24875  2022.4 - 2025.3

    科学研究費助成事業  基盤研究(B)

    河北 真宏, 山本 裕紹, 藤井 俊彰, 河合 紀彦, 村木 祐太

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    Authorship:Coinvestigator(s) 

    本研究では、撮影対象の3次元物体から発せられる光線情報を広い角度範囲で取得できる簡易なライトフィールドカメラを開発する。3次元物体を光学プレートで空中像として結像し、レンズアレイを介して単一カメラで撮影する手法を提案する。本方式により、従来技術の30倍以上の角度(30度以上の視域角度)範囲で光線情報を取得することを目標とする。また、得られた光線情報をもとに、3次元映像のリアルタイム撮影・表示や3次元映像表示の広視域化、リアルな3Dモデルの生成とAR/VR映像への応用など、高度な3次元映像技術を実現する。
    本研究課題の学術的「問い」は、ライトフィールド(LF)技術の進化により、光線情報が持つ3次元情報を効果的に活用して、新しい映像研究の流れを創造することである。本研究では、3次元物体を空中像として結像してレンズアレイを介して撮影することで、単一カメラによる撮影でも30度以上の角度範囲で光線情報を得ることができるLFカメラを開発する。また、その光線情報をもとに、3次元映像のリアルタイム撮影・表示や広視域表示、リアルな3Dモデル生成とAR/VR映像への応用など、高度な映像技術の実現を目指す。
    研究項目(A)「広視域ライトフィールドカメラの開発」では、提案する撮像方式の原理検証を実施した。実験では、被写体の空中像を再帰性反射光学素子により形成し、その像結像位置にレンズアレイを設置してカメラで要素映像を撮影した。実験により撮影可能な3次元映像の解像度特性や光線の取得角度を求め、想定通りに光線取得できることを実証した。また、空中像のゴースト光が光線取得の妨害となる課題については、再帰性反射光学素子への入射光線角度を光学フィルムで制限することで改善した。また、実験結果をもとに、30度以上の広角度の光線を取得できる専用の新規レンズアレイを設計して、年度内に試作を完了させた。
    研究項目(B)「3次元映像表示の高機能化」(B-1)「リアルタイム表示」については、撮像系とインテグラル3D表示系を試作して撮影・表示実験を実施した。その結果、インテグラル3D映像のリアルタイム撮影と表示に成功した。(B-2)「広視域化」については、実験で得られた要素映像を、積層型ディスプレイ用映像への変換方法の開発を進めた。
    研究項目(C)「3次元モデリングとAR/VRへの応用」では、実験で得られた映像データをもとに、必要となる映像処理技術を検討し、微小レンズに対応する要素映像の抽出や幾何補正技術などの開発を進めた。
    研究項目(A)「広視域ライトフィールドカメラの開発」では、当初の予定通りに原理検証実験を行い、提案方式の基本特性測定と課題の抽出、基本原理の実証ができた。この成果を踏まえ、目標とする光線角度30度を実現するためのレンズアレイの設計と試作を完了できた。研究項目(B)「3次元映像表示の高機能化」(B-1)「リアルタイム表示」に関しては、当初の研究計画よりも早期にインテグラル3D映像のリアルタイム撮影と表示を実験で示すことに成功した。研究項目(B-2)「広視域化」と(C)「3次元モデリングとAR/VRへの応用」に関しても映像処理技術の検討を進めるとともに、当初の予定通りに新規レンズアレイの設計・試作が2022年度に完了したことで、次年度から基礎実験を実施できる環境が整った。
    2022年度に提案方式に最適化した専用の新規レンズアレイの試作が完了できたため、2023年度に実験により目標とする角度範囲30度の光線情報撮影を実験で達成する。また、空中像の形成光学系の最適化も進め、撮影性能の向上に取り組む。リアルタイムの3D撮影・表示技術に関しては、新規レンズアレイや高精細映像の適用により映像品質を向上するとともに、具体的な応用を想定した実験も進めていく。また、新規レンズアレイを用いて、積層型の3次元映像の広視域化や3次元形状計測、AR/VR映像生成などの高度な3次元映像技術に関する基礎実験に取り組んでいく。

  3. A Study on Image Capturing and Processing System using Optical Control Device and Event Camera

    Grant number:21H03464  2021.4 - 2024.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

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    Authorship:Principal investigator 

    Grant amount:\17420000 ( Direct Cost: \13400000 、 Indirect Cost:\4020000 )

  4. High efficiency light field coding based on a new compression principle

    Grant number:18H03261  2018.4 - 2021.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    Fujii Toshiaki

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    Authorship:Principal investigator 

    Grant amount:\17420000 ( Direct Cost: \13400000 、 Indirect Cost:\4020000 )

    High efficiency light field (LF) coding schemes have been investigated that are based on different principal from conventional predictive coding and transform coding. First, we studied LF acquisition using coded-aperture camera and succeeded to acquire dynamic LF data with DNN-based learning network. We also investigated layer-type 3D displays, which enable us to generate LFs from only a few layer patters. We improved the quality of the generated LFs using high resolution monochrome layers, and also achieved extrapolation of views through CNN-based learning network. We confirmed through these experiments that such representations as coded-aperture pattern and layer-pattern include essential information about LF. These findings give an important insight to develop high efficiency LF coding schemes in the future.

  5. 新しい原理に基づく光線空間情報リアルタイム取得装置の研究

    2007

    科学研究費補助金  基盤研究(C)(一般),課題番号:19560375

    藤井 俊彰

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    Authorship:Principal investigator 

 

Teaching Experience (On-campus) 7

  1. 確率論・数値計算および演習

    2018

  2. 画像信号処理特論

    2018

  3. センシングシステム工学

    2018

  4. センシングシステム工学

    2016

  5. 画像信号処理特論

    2016

  6. 確率論・数値計算および演習

    2016

  7. First Year Seminar A

    2011

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