ITE Technical Report
Online ISSN : 2424-1970
Print ISSN : 1342-6893
ISSN-L : 1342-6893
Search
Advanced search
OR
Browse
Search
35.15
Displaying 1-21 of 21 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
  • [title in Japanese]
    Article type: Cover
    Pages Cover1-
    Published: March 07, 2011
    Released on J-STAGE: September 21, 2017
    DOIhttps://doi.org/10.11485/itetr.35.15.0_Cover1
    CONFERENCE PROCEEDINGS FREE ACCESS
    Download PDF (16K)
  • [title in Japanese]
    Article type: Index
    Pages Toc1-
    Published: March 07, 2011
    Released on J-STAGE: September 21, 2017
    DOIhttps://doi.org/10.11485/itetr.35.15.0_Toc1
    CONFERENCE PROCEEDINGS FREE ACCESS
    Download PDF (90K)
  • Effects of binocular disparity of stereoscopic images on visually induced motion sickness
    Hiroyasu UJIKE, Hiroshi WATANABE
    Article type: Article
    Session ID: 3DIT2011-1/HI2011-13
    Published: March 07, 2011
    Released on J-STAGE: September 21, 2017
    DOIhttps://doi.org/10.11485/itetr.35.15.0_1
    CONFERENCE PROCEEDINGS FREE ACCESS
    Show abstractHide abstract
    The study investigates whether visually induced motion sickness, or VIMS, is enhanced in stereoscopic images than traditional 2-dimensional images. To do this, we conducted two experiments. In Experiment 1, biomedical effects were measured and compared between stereoscopic image and two dimensional (2-D) image. In Experiment 2, biomedical effects were also compared among two different stereoscopic images, which have different ranges of binocular disparity, and 2-D image. We found both psychological and physiological data showed VIMS were more severe in stereoscopic image than 2-D image. Moreover, the data showed larger range of binocular disparity increased severity of VIMS.
    View full abstract
    Download PDF (676K)
  • Relationship between Interval of Views and Depth of Field in Super Multi-View Display
    Junya NAKAMURA, Kosuke TANAKA, Yasuhiro TAKAKI
    Article type: Article
    Session ID: 3DIT2011-2/HI2011-14
    Published: March 07, 2011
    Released on J-STAGE: September 21, 2017
    DOIhttps://doi.org/10.11485/itetr.35.15.0_5
    CONFERENCE PROCEEDINGS FREE ACCESS
    Show abstractHide abstract
    The super multi-view (SMV) display generates viewing zones with an interval smaller than the pupil diameter. Because the ray extent at the pupil is smaller than the pupil diameter, the effective depth of field (DOF) of an eye imaging system increases. In this study, we measured accommodation responses to the recently developed reduced-view SMV display changing the interval of viewing zones in order to evaluate a relationship between the intervals of viewing zones and the DOF. Measured results show that when the interval of viewing zones was 2.6mm, the DOF increased. When the interval of viewing zones was 5.3mm and 7.9mm, the DOF was determined by the pupil diameter.
    View full abstract
    Download PDF (773K)
  • Pixel-offset position adjustment in image sensors for integral imaging
    Hitoshi HIURA, Jun ARAI, Makoto OKUI, Tomoyuki MISHINA
    Article type: Article
    Session ID: 3DIT2011-3/HI2011-15
    Published: March 07, 2011
    Released on J-STAGE: September 21, 2017
    DOIhttps://doi.org/10.11485/itetr.35.15.0_9
    CONFERENCE PROCEEDINGS FREE ACCESS
    Show abstractHide abstract
    In integral imaging, the resolution of the reconstructed image depends on the number of the pixels with a capturing and a displaying system. For development of the high resolution camera using a pixel-offset method, therefore, is effective. This paper describes a study for adjusting pixel-offset of image sensors using a lens array in integral imaging system. This lens array was able to magnify the pixel-offset of image sensors. As an experimental result, we clarified that the proposed adjustment method is useful as the position adjustment between the two image sensors with good performance.
    View full abstract
    Download PDF (785K)
  • Evaluation Method of Visual Fatigue, while Observing 3D Display and Real Objects
    Ippei NEGISHI, Haruki MIZUSHINA, Hiroshi ANDO, Shinobu MASAKI
    Article type: Article
    Session ID: 3DIT2011-4/HI2011-16
    Published: March 07, 2011
    Released on J-STAGE: September 21, 2017
    DOIhttps://doi.org/10.11485/itetr.35.15.0_13
    CONFERENCE PROCEEDINGS FREE ACCESS
    Show abstractHide abstract
    We compared the performances of visual counting task among 2 planes at different depth to evaluate the visual fatigue after observing 3D display and real objects. The performance was decreased only after observation of 3D display and not decreased after observing real objects. These results were not matched to the results of subjective assessment of visual fatigue and suggest that the quality of visual fatigue while observing 3D display is different from that of real objects.
    View full abstract
    Download PDF (547K)
  • Biomedical effects of real world movie including various factors of interocular image differences
    Hiroshi WATANABE, Hiroyasu UJIKE
    Article type: Article
    Session ID: 3DIT2011-5/HI2011-17
    Published: March 07, 2011
    Released on J-STAGE: September 21, 2017
    DOIhttps://doi.org/10.11485/itetr.35.15.0_17
    CONFERENCE PROCEEDINGS FREE ACCESS
    Show abstractHide abstract
    Seventy-three adults observed the video movie which recorded the real world for ten minutes. We had intentionally involved fourteen undesirable settings (too much disparity, inconsistent matching between both eyes, unnatural speed, etc) in the movie. All participants observed both of the undesirable (modified) movie (3D condition) and the original (non-modified) 3D movie in random order. To obtain observers' subjective evaluation for the comfortability of movie, we employed two measures: Simulator sickness questionnaire (SSQ) before and after observation and comfort level estimation at every one minutes during observation. To measured their physiological changing, we measured participants' electrocardiogram (ECG) and calculated the status of autonomic nerve system during observation. Our results showed that subjective scores was significantly higher when participants observed undesirable 3D movie.
    View full abstract
    Download PDF (634K)
  • Effects to visual function from stereoscopic images
    Sumio Yano
    Article type: Article
    Session ID: 3DIT2011-6/HI2011-18
    Published: March 07, 2011
    Released on J-STAGE: September 21, 2017
    DOIhttps://doi.org/10.11485/itetr.35.15.0_21
    CONFERENCE PROCEEDINGS FREE ACCESS
    Show abstractHide abstract
    Visual psychological effects and characteristics of visual perception for stereoscopic images are briefly described in the relationship between stereoscopic images and the human visual system. As for visual psychological effects, effects from image distortion in the depth direction are described, and the presence quantified using vection are explained. Next, visual comfort and visual fatigue caused from viewing stereoscopic images are described. The visual comfort is explained at the point of the tolerance of image quality, and the visual fatigue is described with relationship between the function of eye-movement and accommodation.
    View full abstract
    Download PDF (1159K)
  • Measurement of Rotational Eye Movement under Varies Pupil Sizes with Fast Fourier Transform
    Hiroyuki NAKAGOMI, Kiyosi HOSINO
    Article type: Article
    Session ID: 3DIT2011-7/HI2011-19
    Published: March 07, 2011
    Released on J-STAGE: September 21, 2017
    DOIhttps://doi.org/10.11485/itetr.35.15.0_27
    CONFERENCE PROCEEDINGS FREE ACCESS
    Show abstractHide abstract
    To search the factor of motion sickness, measurement of rotational eye movement is required to be robust in the dark. But it is difficult to obtain accuracy because iris patterns highly deform in the dark. There is a method of widely searching whether to presume the position of the moving pattern from the model to make the match with the transformed pattern succeed. But it takes time to the method for the request from the model to process the method of the wide-ranging search while the error margin occurs too much. This study proposes the method by which a wide-ranging search can be carried out with a high-speed algorithm so as to be robust in the dark.
    View full abstract
    Download PDF (639K)
  • Experimental Study on Quasi-Stereoscopic View by Subjective Evaluation in Perception of Circular Cone Images Displayed on Video Display Screens
    Tetsuya MURAOKA, Hiroaki IKEDA
    Article type: Article
    Session ID: 3DIT2011-8/HI2011-20
    Published: March 07, 2011
    Released on J-STAGE: September 21, 2017
    DOIhttps://doi.org/10.11485/itetr.35.15.0_31
    CONFERENCE PROCEEDINGS FREE ACCESS
    Show abstractHide abstract
    An experimental study on the perception of quasi-stereoscopic view for the images of a green circular cone on a video display screen was carried out by subjective evaluation for 20 subjects when a digital camera was set at a position on the normal line to the plane of background wall. Since no specific shadow was recognized by no sharp edge on the cone images, the highest quasi-stereoscopic view was satisfactorily perceived at a confidence limit of 95% for the green circular cone images displayed on the video display screen when the light of illumination was incident onto the cone at a rotation angle in the range of 39°to 55°(a mean value of 46°) and at a tilt angle in the range of 40°to 54°(a mean value of: 48°).
    View full abstract
    Download PDF (889K)
  • Study on Iterative Depth Estimation for Multi-view Images : Proposal on Occlusion and Pseudo-Matching Improvement
    Takanori SENOH, Kenji YAMAMOTO, Ryutaro OI, Yasuyuki ICHIHASHI, Taiich ...
    Article type: Article
    Session ID: 3DIT2011-9/HI2011-21
    Published: March 07, 2011
    Released on J-STAGE: September 21, 2017
    DOIhttps://doi.org/10.11485/itetr.35.15.0_35
    CONFERENCE PROCEEDINGS FREE ACCESS
    Show abstractHide abstract
    We propose an iterative depth estimation for improving occlusion and pseudo-matching problems in the depth estimation of multi-view images. Estimated depth is used for the judgment of occlusion or pseudo-matching. The experimental results show the efficacy of proposed method.
    View full abstract
    Download PDF (910K)
  • Cognitive and Brain Mechanisms of 3D Image Processing and their Measurement and Evaluation Technologies
    Hiroshi ANDO
    Article type: Article
    Session ID: 3DIT2011-10/HI2011-2
    Published: March 07, 2011
    Released on J-STAGE: September 21, 2017
    DOIhttps://doi.org/10.11485/itetr.35.15.0_39
    CONFERENCE PROCEEDINGS FREE ACCESS
    Show abstractHide abstract
    This paper describes the research on cognitive and brain mechanisms of 3D image processing and their measurement and evaluation technologies developed in NICT. In particular, we describe the components and factors of presence, the evaluation technology which can measure human brain activities when large-field 3D images are shown, and psychophysical evaluation and brain activity imaging on human sense of surface quality, especially glossiness.
    View full abstract
    Download PDF (934K)
  • Zone Plate Method for Hologram Display Module
    Yasuhiro Takaki, Junya NAKAMURA
    Article type: Article
    Session ID: 3DIT2011-11/HI2011-2
    Published: March 07, 2011
    Released on J-STAGE: September 21, 2017
    DOIhttps://doi.org/10.11485/itetr.35.15.0_43
    CONFERENCE PROCEEDINGS FREE ACCESS
    Show abstractHide abstract
    The zone plate method specialized for the hologram display module was developed. The zone plate pattern was explored analytically using the calculation technique that was originally used to obtain the patterns displayed on the spatial light modulator. Then, the zone plate pattern was modeled. The developed zone plate method was verified experimentally by displaying 3D images using the hologram display module.
    View full abstract
    Download PDF (1087K)
  • Investigation of lightning for extraction of finger nail areas in hand images
    Noriaki FUJISHIMA, Kiyoshi HOSHINO
    Article type: Article
    Session ID: 3DIT2011-12/HI2011-2
    Published: March 07, 2011
    Released on J-STAGE: September 21, 2017
    DOIhttps://doi.org/10.11485/itetr.35.15.0_47
    CONFERENCE PROCEEDINGS FREE ACCESS
    Show abstractHide abstract
    It is advantageous to be able to use the nail position information for the gesture recognition about interaction system using the 3D vision and the gesture. However, nail area extraction method effective by both sides of the hand is not confirmed. In this paper, therefore, the purposes of this study are to find important conditions for the separation using color information with white light. As a result, The author could get sights that it is necessary to make lights powerful and put them around hands in order not to make shadow.
    View full abstract
    Download PDF (694K)
  • Periodic Stereo Image which has periodically changing depth
    Noriji OISHI
    Article type: Article
    Session ID: 3DIT2011-13/HI2011-2
    Published: March 07, 2011
    Released on J-STAGE: September 21, 2017
    DOIhttps://doi.org/10.11485/itetr.35.15.0_51
    CONFERENCE PROCEEDINGS FREE ACCESS
    Show abstractHide abstract
    Periodic Stereo Image which consists of lenticular-lens and the periodic image is characterized by stereoscopic images without pseudoscopic regions and viewing zone boundaries, but only can realize monotonous expression with object images of which spacing and depth are determined by moire period. In this study, a method to generate the Periodic Stereo Image which has periodically changing depth was contrived and the effect of that was experimentally confirmed. This method can be carried out by setting conditions for creating original images, and the conventional algorithm for making periodic image can be used. Therefor it can be applied to direct generation of periodic image using MegaPOV.
    View full abstract
    Download PDF (604K)
  • Free spatial sketch environment using simple gesture and 6 DOF
    Li Li, Shun'ichi Tano, Junko Ichino, Tomonori Hashiyama, Tomohito ...
    Article type: Article
    Session ID: 3DIT2011-14/HI2011-2
    Published: March 07, 2011
    Released on J-STAGE: September 21, 2017
    DOIhttps://doi.org/10.11485/itetr.35.15.0_55
    CONFERENCE PROCEEDINGS FREE ACCESS
    Show abstractHide abstract
    In this paper, free spatial sketch environment using simple gesture and 6DOF is proposed. First, analyze the previous and past studies, made clear the problem. To solve these problems, an user interface that a sketch environment of using simple gesture and 6DOF was designed for the use of aerial sketch. Experiments conducted using a prototype of this system was implemented, we confirmed the basic validity of the proposed system.
    View full abstract
    Download PDF (790K)
  • Detection of key input by three dimension hand posture estimation
    Hayato FURUKAWA, Hotaka WATARAI, Youhei TOYOHARA, Kiyoshi HOSHINO
    Article type: Article
    Session ID: 3DIT2011-15/HI2011-2
    Published: March 07, 2011
    Released on J-STAGE: September 21, 2017
    DOIhttps://doi.org/10.11485/itetr.35.15.0_59
    CONFERENCE PROCEEDINGS FREE ACCESS
    Show abstractHide abstract
    If the user can input information by hand movement, it enables more complex work in 3D virtual space. We propose a system to detect key input using 3D hand posture estimation system which estimates by camera image with high accuracy without holding the hand still. It is necessary for the input like keyboard to estimate both hands posture accurately. By using the estimated result by two camera images which are captured from different direction, the system detects key input with high accuracy.
    View full abstract
    Download PDF (667K)
  • Effect of 3D display principle on representation of surface quality : Psychophysical evindence and computational consideration on the effects of stereo viewing and head motion on perceived glossiness
    Yuichi SAKANO, Hiroshi ANDO
    Article type: Article
    Session ID: 3DIT2011-16/HI2011-2
    Published: March 07, 2011
    Released on J-STAGE: September 21, 2017
    DOIhttps://doi.org/10.11485/itetr.35.15.0_63
    CONFERENCE PROCEEDINGS FREE ACCESS
    Show abstractHide abstract
    Based on subjective evaluation evidence, it has been reported that high-density directional 3D displays produce high glossiness. Here as a more fundamental study, we gave some computational consideration on estimation of surface reflectance properties and showed that retinal image differences between the two eyes and retinal image changes due to observer's head motion have information about the reflectance properties of the object surface. We also conducted a series of psychophysical experiments using a CRT, liquid crystal shutter goggles and a head-tracking system, and showed that these gloss cues affect perceived glossiness. These results suggest that glossiness reproduction, in principle, improves in the order of 2D, 2-view, and multi-view 3D displays.
    View full abstract
    Download PDF (695K)
  • [title in Japanese]
    Article type: Appendix
    Pages App1-
    Published: March 07, 2011
    Released on J-STAGE: September 21, 2017
    DOIhttps://doi.org/10.11485/itetr.35.15.0_App1
    CONFERENCE PROCEEDINGS FREE ACCESS
    Download PDF (103K)
  • [title in Japanese]
    Article type: Appendix
    Pages App2-
    Published: March 07, 2011
    Released on J-STAGE: September 21, 2017
    DOIhttps://doi.org/10.11485/itetr.35.15.0_App2
    CONFERENCE PROCEEDINGS FREE ACCESS
    Download PDF (103K)
  • [title in Japanese]
    Article type: Appendix
    Pages App3-
    Published: March 07, 2011
    Released on J-STAGE: September 21, 2017
    DOIhttps://doi.org/10.11485/itetr.35.15.0_App3
    CONFERENCE PROCEEDINGS FREE ACCESS
    Download PDF (103K)
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top