ITE Technical Report
Online ISSN : 2424-1970
Print ISSN : 1342-6893
ISSN-L : 1342-6893
Search
Advanced search
OR
Browse
Search
21.40
Displaying 1-13 of 13 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
  • [title in Japanese]
    Article type: Cover
    Pages Cover1-
    Published: June 19, 1997
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.21.40.0_Cover1
    CONFERENCE PROCEEDINGS FREE ACCESS
    Download PDF (16K)
  • [title in Japanese]
    Article type: Index
    Pages Toc1-
    Published: June 19, 1997
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.21.40.0_Toc1
    CONFERENCE PROCEEDINGS FREE ACCESS
    Download PDF (65K)
  • Analysis of camera work and subject's position in image while shooting moving target
    Daiichiro KATO, Masayoshi OBATA, Kazuo ABE, Mitsuho YAMADA, Akio ISHIK ...
    Article type: Article
    Pages 1-6
    Published: June 19, 1997
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.21.40.0_1
    CONFERENCE PROCEEDINGS FREE ACCESS
    Show abstractHide abstract
    We are studying about an intelligent robot camera which can shoot realistic images. As the basic experiments, we analyzed cameramen's work when they were shooting a moving target. We got that they leave space in front of a moving target in the image, and this quantity of the space depends on rather the target's size in the image than its velocity, and in the case shooting bigger, faster target, variation of the target's position become bigger, response time of the cameraman has no relationship with target's size and velocity, and is about 200msec to 400msec when the target is turning, etc.
    View full abstract
    Download PDF (810K)
  • Relationship between Human Nasal Cycle and Circadian Rhythm
    Shisei TOMA, Kiyoshi HOSHINO
    Article type: Article
    Pages 7-10
    Published: June 19, 1997
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.21.40.0_7
    CONFERENCE PROCEEDINGS FREE ACCESS
    Show abstractHide abstract
    The purpose of this study is to investigate the relationship between the human nasal cycle and circadian rhythm. Both sides of nasal breathing were measured with small thermistors and the time-series data were converted into digital data. The nasal cycle was obtained by calculating the switching duration of a predominant side of nasal breathing. The experimental results showed that the frequency of the nasal cycle is high in the daytime compared with that in the early morning and at night, suggesting that the nasal cycle was influenced by circadian rhythm.
    View full abstract
    Download PDF (356K)
  • Analysis of Pupillary Response under Active and Passive Stresses
    Yukihiro NOMURA, Kiyoshi Hoshino
    Article type: Article
    Pages 11-14
    Published: June 19, 1997
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.21.40.0_11
    CONFERENCE PROCEEDINGS FREE ACCESS
    Show abstractHide abstract
    The purpose of this study is to discuss the difference between active and passive stressors on the human, using the pupillary response as a physiological index. The infrared video-pupillography was used and the pupil behavior was analyzed to the step change of stressors. The time-series data obtained were investigated in the domain of frequency and trend. The experimental results showed that pupillary dilatation was evoked under both active and passive stress but passive stressor caused quick dilatation. The considerable individual differences were exhibited especially under active stress.
    View full abstract
    Download PDF (324K)
  • Nonlinear forecast as a way of analyzing of the effects of mismatch between the accommodation and convergence on human pulse wave
    Takeshi Matozaki, Akira Tomisaki, Thoru Ikeguchi
    Article type: Article
    Pages 15-19
    Published: June 19, 1997
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.21.40.0_15
    CONFERENCE PROCEEDINGS FREE ACCESS
    Show abstractHide abstract
    When we are observing stereoscopic (3D) images by binocular display techniques, the mismatch of distance between the accommodation and convergence of human eyes occurs. Due to this mismatch, subjects feel physical and psychological stress. Pulsewave is one of the suitable parameters for analyzing the effect. In this study, we apply nonlinear prediction to pulse waves in order to analyze the effects from the view point of nonlinear dynamical systems theory. Consequently we could find different of responses of subjects observing 2D and 3D images.
    View full abstract
    Download PDF (629K)
  • Perception of half-occluded region and edge sharpness of stereoscopic images
    Masaki Emoto, Tetsuo Mitsuhashi
    Article type: Article
    Pages 21-26
    Published: June 19, 1997
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.21.40.0_21
    CONFERENCE PROCEEDINGS FREE ACCESS
    Show abstractHide abstract
    A sharpness of horizontal three dimensional edge is perceived sharper than two dimensional edge, while vertical edge is perceived as same as two dimensional edge. We assumed that the difference of sharpness is caused by the occurrence of local binocular rivalry on half-occluded region of stereoscopic images. To confirm this assumption, we measured the time of alternation of dominant eye as an index of local binocular rivalry. The result showed that the alternation frequency increased only on the half-occluded condition and the distribution functions of the alternation duration differed from other conditions which suggested the occurrence of local binocular rivalry on the region.
    View full abstract
    Download PDF (914K)
  • Chain of Circles for Robust Matching and Hierarchical Recognition of 2-D Shapes (II)
    Jae-Moon Chung, Noboru Ohnishi
    Article type: Article
    Pages 27-32
    Published: June 19, 1997
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.21.40.0_27
    CONFERENCE PROCEEDINGS FREE ACCESS
    Show abstractHide abstract
    Based on a resulting medial axis configuration of 2-D shapes, previously we proposed a new shape description called Chain of Circles (CoCs). This paper shows how the CoCs representation is robustly used in matching of shapes with various deformations. The shape dissimilarity between a pair of CoCs is first coarsely calculated via the matching process, then finely calculated between specific and salient parts of the shapes, and finally used for recognition. This hierarchical recognition scheme seems to be in accord with the human shape recognition and gives much computational efficiency.
    View full abstract
    Download PDF (686K)
  • A Linear Method for Recovering Motion and Shape from Optical Flow under Perspective Projection
    Toshiharu MUKAI, Noboru OHNISHI
    Article type: Article
    Pages 33-38
    Published: June 19, 1997
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.21.40.0_33
    CONFERENCE PROCEEDINGS FREE ACCESS
    Show abstractHide abstract
    The recovery of the three-dimensional motion parameters and structure of a relatively moving object from its perspectively projected two-dimensional optical flow is one of the most important problems in computer vision. Previous studies on shape and motion from optical flow have been unsatisfactory because they require solving nonlinear simultaneous equations using iterative search. In the present paper, we propose a method for recovering motion and structure from perspectively projected optical flow of feature points which move rigidly. In order to simplify the computation and obtain clear perspectives, we adopt a spherical image screen and arrange equations in linear form. As a result, our method does not require the solution of nonlinear simultaneous equations, but only requires the solution of linear ones. In addition, the uniqueness of the solution is guaranteed. Simulation results of our method are also presented.
    View full abstract
    Download PDF (653K)
  • The Effect of Visual Attention on Miniature Eye Movement
    Takeshi KOHAMA, Ken SHINKAI, Shigeki NAKAUCHI, Yoshimi KAMIYAMA, Naohi ...
    Article type: Article
    Pages 39-44
    Published: June 19, 1997
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.21.40.0_39
    CONFERENCE PROCEEDINGS FREE ACCESS
    Show abstractHide abstract
    In order to consider the effects of the visual attention (VA) on human involuntary miniature eye movements (MEM), we analyzed the microsaccade (MSC) which is a component of MEM, under the following three experimental conditions : 1) VA was focused on the foveal object, 2) VA was dispersed in the parafoveal visual field, and 3) VA was focused on one of the parafoveal objects. As the result, when VA was not focused on the foveal object, both frequency and amplitude of MSC increased and the scatter of fixation became more widely. By comparison between the experimental condition 2) and 3), frequency of MSC was more often in 2) and mean amplitude of MSC was almost equal in both conditions. This is, when VA is not focused, MSC occurs more frequently, and when VA is focused on the foveal object, the amplitude of MSC become smaller. These results suggest that MEM is influenced by VA and MSC may be used as an indicator of attentional state. It will be possible to observe whether VA is focused or not on the basis of the analysis of MEM acceleration.
    View full abstract
    Download PDF (1095K)
  • The Effect of the Ocular Parallax during Gazing Process : analysis of small eye movements
    Hiroaki Kudo, Noboru Ohnishi
    Article type: Article
    Pages 45-50
    Published: June 19, 1997
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.21.40.0_45
    CONFERENCE PROCEEDINGS FREE ACCESS
    Show abstractHide abstract
    We measured eye movements to examine the effect of the ocular parallax induced by small eye movements as a common observation. We analyzed gazing positions, sight line path of intergazing positions, and duration time. The results show that gazing positions are distributed in bounded region to a certain extent, and sight line paths are distributed isotropically, during gazing on a planar surface in some depth. On the other hand, when human gazes the surfaces which are located in different depth, gazing positions are distributed in a wider area and closer to each other, and tend to shift a sight line in order to compare ocular parallax between two surfaces. These results indicate the possibility that human uses the ocular parallax as a cue of depth perception.
    View full abstract
    Download PDF (1045K)
  • Perception of a Point-Light-Walker Produced by the Lights Attached at the Back of Walker
    Shigemasa Sumi
    Article type: Article
    Pages 51-56
    Published: June 19, 1997
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.21.40.0_51
    CONFERENCE PROCEEDINGS FREE ACCESS
    Show abstractHide abstract
    The eight point-lights, attached at the back of a walker, produced'point-light-walker (PLW) giving a vivid impression of an invisible human being. The observers (N-400) could discriminate the sex differences of the PLWs produced by the eight actors (72% correct on average), although it was difficult for them to estimate the PLW ages (the average 37 years old). The correlational changes appearing in the moving point-lights of PLWs seemed to be playing an important role in PLW's biological motion perception.
    View full abstract
    Download PDF (696K)
  • [title in Japanese]
    Article type: Appendix
    Pages App1-
    Published: June 19, 1997
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.21.40.0_App1
    CONFERENCE PROCEEDINGS FREE ACCESS
    Download PDF (83K)
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top