ITE Technical Report
Online ISSN : 2433-0914
Print ISSN : 0386-4227
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Volume 18, Issue 60
Displaying 1-10 of 10 articles from this issue
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  • [title in Japanese]
    Article type: Cover
    1994 Volume 18 Issue 60 Pages Cover1-
    Published: October 28, 1994
    Released on J-STAGE: October 13, 2017
    DOIhttps://doi.org/10.11485/tvtr.18.60_Cover1
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
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  • [title in Japanese]
    Article type: Index
    1994 Volume 18 Issue 60 Pages Toc1-
    Published: October 28, 1994
    Released on J-STAGE: October 13, 2017
    DOIhttps://doi.org/10.11485/tvtr.18.60_Toc1
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
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  • Quantized Computer Hologram with Error Convergence
    Akihito MIYAMOTO, Shin TANAHASHI, Yoshinao AOKI
    Article type: Article
    1994 Volume 18 Issue 60 Pages 1-6
    Published: October 28, 1994
    Released on J-STAGE: October 13, 2017
    DOIhttps://doi.org/10.11485/tvtr.18.60_1
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    A method of quantization digital holograms with which more effective reconstructions can be able to get, is presented. The method is based on an iterative quantization method which has iteration steps for correcting errors by quantization. It is possible to get better reconstructions than a conventional method because of simplified algorithm. The production of holograms using the proposed method is described. As a result, thier simulated and optical reconstruntions are presented.
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  • A High Speed Synthesis Method of Sign Language Images by Mask Composition
    Shin TANAHASHI, Yoshinao AOKI
    Article type: Article
    1994 Volume 18 Issue 60 Pages 7-12
    Published: October 28, 1994
    Released on J-STAGE: October 13, 2017
    DOIhttps://doi.org/10.11485/tvtr.18.60_7
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    Sign language has several characteristics. We have developed a sign language display system by using these characteristics. For example, it is more important to express movement of hands than express detail. In this paper, we discuss the method of synthesizing at high speed, and layer of data processing.
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  • An Analysis of Individuality in Auricle Images
    Kunihiko OHMIYA, Katsuyuki SHINOHARA, Yoshinori YUKI
    Article type: Article
    1994 Volume 18 Issue 60 Pages 13-18
    Published: October 28, 1994
    Released on J-STAGE: October 13, 2017
    DOIhttps://doi.org/10.11485/tvtr.18.60_13
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    In a highly developed information society, personal identification for security measures has been highly demanded in a wide variety of usage. Authors propose to use auricles for personal identification using human body characterisctics in the next genaration. In this paper, we describe the following examinations to analyze individuality in auricle images. (1)Recognition using regional feature extarcted by block division. (2)Recognition using linear feature based on the medical classificaiton. We also describe a analysis and consideration of experiment results.
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  • Perception and Sharpness of edge in 3-D images
    Masaki Emoto, Tetsuo Mitsuhashi
    Article type: Article
    1994 Volume 18 Issue 60 Pages 19-24
    Published: October 28, 1994
    Released on J-STAGE: October 13, 2017
    DOIhttps://doi.org/10.11485/tvtr.18.60_19
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    We assesed the sharpness of edge in three dimensional(3D) geometrical images comparing with that in two dimensional(2D) images. We found no difference between subjective evaluation value for 3D edge sharpness with local rivalry and that for 2D edge. This result suggests that the interocular suppression is responsible for the evaluation. Other results of forced choice experiments also showed the effects of the suppression, which were consistent with the suggestion.
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  • The Phenomenon Causing the Poggendorff Illusion Compensates Geometrical Error in Reconstructed 2D Image from Stereopsis
    Sakuichi Ohtsuka, Sumio Yano
    Article type: Article
    1994 Volume 18 Issue 60 Pages 25-30
    Published: October 28, 1994
    Released on J-STAGE: October 13, 2017
    DOIhttps://doi.org/10.11485/tvtr.18.60_25
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    This paper discusses geometrical distortions (i.e., errors) found in a reconstructed two-dimensional (2D) image from three-dimensional (3D) space by human observers with stereopsis. Psychological experiments employing stimuli of 2D- and 3D- Poggendorff illusion show that the difference in effect between the two conditions agrees well with an estimation calculated from the errors mentioned above. It is therefore suggested that the phenomenon that causes Poggendorff illusion works as an error compensator when the observer views lines with occlusion in a normal 3D space. Key-words: Poggendorff illusion. Stereopsis, Binocular vision, Amodal completion, Perception. Human vision.
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  • Dependence of Motion Assimilation on Stimulus Temporal Parameters
    Keisuke IDO, Yoshio OHTANI, Yoshimichi EJIMA
    Article type: Article
    1994 Volume 18 Issue 60 Pages 31-36
    Published: October 28, 1994
    Released on J-STAGE: October 13, 2017
    DOIhttps://doi.org/10.11485/tvtr.18.60_31
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    The present study analyzed the effects of temporal parameters of stimulus on motion assimilation for sinusoidal gratings. The motion assimilation occurred when both the test and the inducing gratings were displaced abruptly in a two-frame motion display, but not when either or both of them were drifted continuously. The magnitude of motion assimilation was eliminated for the near-stationary test grating, and the magnitude became reduced for the inducing grating presented in a four-frame display. These results were discussed by taking into account of the spatiotemporal frequency components of the stimuli and temporal integration of motion signals.
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  • Current Digital Image Generation Technology in Movie and CF
    MASAYUKI NAKAJIMA
    Article type: Article
    1994 Volume 18 Issue 60 Pages 37-39
    Published: October 28, 1994
    Released on J-STAGE: October 13, 2017
    DOIhttps://doi.org/10.11485/tvtr.18.60_37
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    The image generation technology using digital image processing and computer graphics has been improved so rapid that many movies and commercial films are generated using these technology these days. In my lecture. I will intoroduce the latest digital image technology used current movies released in 1994 in America and Japan. Further. I will introduce Motion Capturing system which is become very famous at SIGGRAPH' 94.
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  • [title in Japanese]
    Article type: Appendix
    1994 Volume 18 Issue 60 Pages App1-
    Published: October 28, 1994
    Released on J-STAGE: October 13, 2017
    DOIhttps://doi.org/10.11485/tvtr.18.60_App1
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
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