ITE Technical Report
Online ISSN : 2424-1970
Print ISSN : 1342-6893
ISSN-L : 1342-6893
26.68
Showing 1-16 articles out of 16 articles from the selected issue
  • Type: Cover
    Pages Cover1-
    Published: October 25, 2002
    Released: September 20, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • Type: Index
    Pages Toc1-
    Published: October 25, 2002
    Released: September 20, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • Hui ZHANG, Masanori IDESAWA
    Type: Article
    Session ID: HIR2002-119
    Published: October 25, 2002
    Released: September 20, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    In this study, we investigated the perceptual rigidity in the cross illusion with illusory rectangles ; then we found that the perceptual rigidity is changed according to the supporting length of rectangle and the interpolated span as an illusory surface. Namely, the distortion is more difficult to be perceived in the longer supporting part condition and easier to be perceived in the longer interpolated span condition. We can easy to understand that these perceptual properties as an analogy in real world with the beam characteristics in the strength of material. However, the rigid perception relating to the other parameters such as shapes, width and so forth, was not apparent in the present experiments.
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  • Mariko UCHIDA, Masanori IDESAWA
    Type: Article
    Session ID: HIR2002-120
    Published: October 25, 2002
    Released: September 20, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    We displayed the object of cones put on invisible sphere rotating in depth, and made the subjects observe it. They could perceive not only the three-dimensional shape of sphere but also the illusory transparent material filled in the sphere. Several authors (Nakayama, K., et al., 1990 ; etc.) have reported about the transparent perception on a plane, but little has been discussed about the transparent perception on the solid surface. In order to study what can induce the illusory transparent solid, we examined the relation between the number of cones and the size of sphere. The results suggested that the transparency could be perceived when the numbers of cones were arranged enough along the contours of sphere. We conclude that the unpaired region between temporally sequential images appears along the occluding contour can induce the illusory transparent solid.
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  • Hai Yang, Zheng Tang, Masahiro Ishii, Hiroki Tamura
    Type: Article
    Session ID: HIR2002-121
    Published: October 25, 2002
    Released: September 20, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    The researched is the subjective contours which is not visible by the simple eye, But the RDS fusion is can be perceived after both-eyes fusion or not.
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  • Kenta Takeshima, Mamoru Takamatsu, Yoshio Nakashima
    Type: Article
    Session ID: HIR2002-122
    Published: October 25, 2002
    Released: September 20, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    It is well known that color appearance depends on the visual environments. In this experiment, apparent color and hue-shift in the small visual angles were investigated quantitatively employing the color-naming method. Three observers with normal color vision and visual acuity participated in this experiment. Color perception shifted from chromatic color to achromatic color as the decrease of the visual angles. We are confident that in the visual environments involving small visual angles, these results are useful both for the basic study and for the practical applications.
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  • Akira KUSHIDA, Yuukou HORITA, Kazuhiro HONDA, Tadakuni MURAI
    Type: Article
    Session ID: HIR2002-123
    Published: October 25, 2002
    Released: September 20, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    This paper presents the perceptual difference of the disparate quality in object- and background-region of coded picture. Subjective evaluation experiment is based on the stereoscopic picture which has obtained by changing the coding parameters in an object region and a background region. From the ANOVA and regression analysis, overallpicture quality of coded stereoscopic picture has good agreement with a product value of the picture quality in object- and background-region. As the overall picture quality, the lower quality is more significant rather than the higher quality.
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  • Takamichi MIYATA, Yuukou HORITA, Kazuhiro HONDA, Tadakuni MURAI
    Type: Article
    Session ID: HIR2002-124
    Published: October 25, 2002
    Released: September 20, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    We propose the improvement of the quality evaluation method for evaluated value by SSCQE method. This improved method is not only apply the statical quality estimation of every frame derived by PQS (Picture Quality Scale) but also consider the dynamic degradation and the global motion of video. All of the parameters of the proposed method are decided by using the Particle Swarm Optimization. By comparing with the conventional method and the proposed method, the improvement of estimated accuracy is appearing.
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  • Shinsuke Tsuri, Santaro Nakajima, Yoshio Nakashima, Mamoru Takamatsu
    Type: Article
    Session ID: HIR2002-125
    Published: October 25, 2002
    Released: September 20, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    Traffic information boards have a vital role in promoting safety and efficient road traffic, by providing the drivers with relevant traffic information on a real-time basis. To achieve good visibility and eye-catching quality, we must know the optimum number of display colors and ranges of chromaticity so that the road users can correctly recognize displayed information in a short time. We attempted to determine the optimum number of display colors based on the categorical color (basic perceived color) technique, as well as to define the chromaticity regions for display colors so that a given color is most effectively discriminated from the others. The results showed that the optimum number of display colors is ten, and categorization of the so-defined ten display colors on the chromaticity diagram is extremely useful in designing a traffic information board.
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  • Shinji Nohara, Atsushi Hodumi, Yoshio Nakashima, Mamoru Takamatsu
    Type: Article
    Session ID: HIR2002-126
    Published: October 25, 2002
    Released: September 20, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    In recent years, there is a report that the traffic accident, which caused at the time of automobile operation, is increasing with the spread of mobile phones. This is considered because the cautions to operation are obstructed by use of a mobile phone. On the other hand, a driver measures the vision range which can distribute cautions at the time of operation, and it is very important to consider quantitatively the influence on which it is exerted by auditory information for the field of safety. Then, in this research, we studied how does the load in auditory information affect the vision information considered that cognitive processing levels differ, and offered the fundamental data for this field. From the result, it was shown that reaction time increases with the load of hearing information increased. Moreover, it was shown that reaction time increases more by complicating vision search. Therefore, it became clear that use of a mobile phone affects automobile operation.
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  • Shin-ichi Nagayama, Yoshio Nakashima, Mamoru Takamatsu, Takashi Miyako ...
    Type: Article
    Session ID: HIR2002-127
    Published: October 25, 2002
    Released: September 20, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    With the trend of 24 hours lifestyles, the importance of the creation of beautiful urban nightscape has increased. And, the landscape lighting design plays higher cultural roles such as "Creation of the comfortable lighting emvironment". In this study, we apply the SD technique and the Factor Analysis to the image evaluation of the Kanazawa city, which is the typical local city in Japan. As a result of the Fator Analysis, We detect the three factors, which are "Activity", "Actuality" and "Evaluation". In conclusion, the evaluation of the lighting of nightscape is better than that of the dayscape, base on the three factors. Also, we find that the appropriate lighting design is more important in improving the image of the urban nightscape and activating the urban life.
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  • Takashi MIYAGOSHI, Mamoru TAKAMATSU, Yoshio NAKASHIMA, Shin-ichi NAGAY ...
    Type: Article
    Session ID: HIR2002-128
    Published: October 25, 2002
    Released: September 20, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    In this study, we investigated how the colors (red and white) of the vending machines virtually installed by CG would affect the traditional landscape. In addition, the harmony of the color of a vending machine with the surrounding landscape and the comparison between in case where there is an advertisement or nothing etc. were also experimented. Landscape samples of around the Takayama city were evaluated by 20 subjects using SD techniques. The results of our experiments show that the vending machines have great influence on the surrounding landscape. On the other hand, we confirmed that they can harmonize with the circumference landscape by the color used.
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  • Katsuhiro Ichikawa, Hiroshi Fujita
    Type: Article
    Session ID: HIR2002-129
    Published: October 25, 2002
    Released: September 20, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    We developed a new MTF measurement method for display using a bar pattern image. This method was designed for easy measurement of the synthetic resolution of the display and the video interface of a computer. A bar pattern image was exposed with a single-lens reflex digital camera, and the waveform data obtained from this image data was processed by the interpolation technique based on a sampling theorem. MTF was then calculated by frequency analysis of the interpolated data. The precision and easy operativity of this method indicated its usefulness.
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  • Kenji KINOSHITA, Juri MATSUSHITA
    Type: Article
    Session ID: HIR2002-130
    Published: October 25, 2002
    Released: September 20, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    According to the development of bioinformatics, it becomes important to treat protein and DNA (deoxyribonucleic acid) data registered in databases such as the PDB (Protein Data Bank). For understanding of these numerous data, it is convenient to use computer graphic techniques. Although there are many molecular graphics programs for this purpose, generally it is difficult to modify these programs for displaying user-oriented images. Therefore, we tried to develop a new molecular graphics program using the graphics library OpenGL. Here, we present some images generated with this program : the double helical structure of DNAs, the tertiary structure of prion proteins based on α-helices, β-sheets and loops.
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  • Type: Appendix
    Pages App1-
    Published: October 25, 2002
    Released: September 20, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • Type: Appendix
    Pages App2-
    Published: October 25, 2002
    Released: September 20, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    Download PDF (73K)
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