ITE Technical Report
Online ISSN : 2424-1970
Print ISSN : 1342-6893
ISSN-L : 1342-6893
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33.33
Displaying 1-13 of 13 articles from this issue
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  • [title in Japanese]
    Article type: Cover
    Pages Cover1-
    Published: August 03, 2009
    Released on J-STAGE: September 20, 2017
    DOIhttps://doi.org/10.11485/itetr.33.33.0_Cover1
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • [title in Japanese]
    Article type: Index
    Pages Toc1-
    Published: August 03, 2009
    Released on J-STAGE: September 20, 2017
    DOIhttps://doi.org/10.11485/itetr.33.33.0_Toc1
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • A Study about an Optimal Design Method of High-Order Delta-Sigma Modulator with Transmission Zeros for Class-D Amplifier
    Motoki HARADA, Satoshi HIRANO, Tomio GOTO, Masaru SAKURAI
    Article type: Article
    Session ID: CE2009-37/ME2009-112
    Published: August 03, 2009
    Released on J-STAGE: September 20, 2017
    DOIhttps://doi.org/10.11485/itetr.33.33.0_1
    CONFERENCE PROCEEDINGS FREE ACCESS
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    The class-D audio amplifier using delta-sigma (ΔΣ) modulation technique has been spotlighted recently. In order to implement the high performance class-D amplifier, the order of the ΔΣ modulator needs to be higher as much as possible. However the design of high-order ΔΣ modulator is very difficult because of necessity of optimal parameter setting with keeping system stability. In this paper, we propose a new design solution which guarantees the system stability. Our approach saves the design time of the ΔΣ modulator enormously compared with the conventional method.
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  • A Development of High Density Near-Field Optical Disc System
    Hiroyuki TANAKA, Masanori HORITA, Eisaku KAWANO, Tohru KANEGAE, Yutaka ...
    Article type: Article
    Session ID: CE2009-38/ME2009-113
    Published: August 03, 2009
    Released on J-STAGE: September 20, 2017
    DOIhttps://doi.org/10.11485/itetr.33.33.0_5
    CONFERENCE PROCEEDINGS FREE ACCESS
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    The near-field optical disc system is a candidacy of next generation high capacity optical disc system. We developed a prototype of the near-field optical disc system, and obtained good physical characteristics of read-out signal with 100GB ROM disc (single side/single layer).
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  • Image Quality Improvement for H.264 Mobile TV
    Taku KARIYAZAKI, Tomio GOTO, Satoshi HIRANO, Masaru SAKURAI
    Article type: Article
    Session ID: CE2009-39/ME2009-114
    Published: August 03, 2009
    Released on J-STAGE: September 20, 2017
    DOIhttps://doi.org/10.11485/itetr.33.33.0_9
    CONFERENCE PROCEEDINGS FREE ACCESS
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    In Japanese mobile broadcasting, the H.264 compression standard is used. In spite of the high compression efficiency of H.264, the mobile broadcast channel is very narrow for sending high quality pictures. In the H.264 system, the deblocking filter is adopted in order to reduce blocky noise. However, when the channel band width is narrow, the deblocking filter degrades the picture sharpness enormously. In this paper we propose a new deblocking method using wavelet transform. The proposed method reduces blocky noise more effectively and does not lose picture sharpness compared with the conventional method.
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  • A Note on SVDD-Based Automatic Target Object Extraction for Image Retrieval
    Hiroshi OKADA, Takahiro OGAWA, Miki HASEYAMA
    Article type: Article
    Session ID: CE2009-40/ME2009-115
    Published: August 03, 2009
    Released on J-STAGE: September 20, 2017
    DOIhttps://doi.org/10.11485/itetr.33.33.0_13
    CONFERENCE PROCEEDINGS FREE ACCESS
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    This paper proposes an automatic extraction method of target objects from images based on the support vector data description (SVDD) for image retrieval. From training images including and not including target objects, the proposed method enables their automatic extraction. Specifically, probabilities which feature vectors of local areas belong to the object class is defined based on distances from center of the hypersphere, and positive areas including target objects and negative areas not including these objects can be obtained from the training images based on the probabilities. In this scheme, in order to obtain the hypersphere which can separate the positive areas and the negative ones more accurately, the feature vectors are selected adaptively. Furthermore, by iterating the calculation of the hypersphere and the extraction of the positive areas and the negative ones in various sizes, the detection of target objects in images can be realized without manually extracting areas of target objects. Therefore, image retrieval based on object extraction can be expected.
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  • A Note on Accurate Scene Segmentation Utilizing Speech Recognition : Introduction of Video Structure Analysis Using Object Matching
    Yo NARITA, Miki HASEYAMA
    Article type: Article
    Session ID: CE2009-41/ME2009-116
    Published: August 03, 2009
    Released on J-STAGE: September 20, 2017
    DOIhttps://doi.org/10.11485/itetr.33.33.0_17
    CONFERENCE PROCEEDINGS FREE ACCESS
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    This paper proposes an improvement method for scene segmentation which uses new features defined from speech recognition result. In the proposed method, the new features are defined based on the appearance distribution of terms in fixed-length short segments of video materials. Furthermore, similarities between two segments are calculated from the obtained features as similarities of topics. Then, the changes of topics are detected from the time transition of the similarities, and the problem of over segmentations caused in the traditional methods can be alleviated by combining both their methods and our method. Finally, the proposed method realizes accurate scene segmentations based on the topics of video materials.
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  • Development for appearance reproduction synchronized with hand detection
    Shoji Yamamoto, Sayuri Kamimigaki, Norimichi Tsumura, Toshiya Nakaguch ...
    Article type: Article
    Session ID: CE2009-42/ME2009-117
    Published: August 03, 2009
    Released on J-STAGE: September 20, 2017
    DOIhttps://doi.org/10.11485/itetr.33.33.0_21
    CONFERENCE PROCEEDINGS FREE ACCESS
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    We have been developing a rapid proto-typing display system which can verify an appearance of final product in finishing and painting industry. In this system, it is necessary to measure detail information of hand position and shape to recognize the worker's instruction. Therefore, we apply a rapid hand measurement which combine a roughly detecting of hand position and shape by spatial encoding method with IR projection. For detecting of hand position, non-linearity interval strips are used for detecting objects that are lower than constant height. The interval of strips is devised in relation to an angle of camera axis to make equal the height in detecting. For detecting of hand shape, the spatial encoding pattern is projected only an area of hand position. The limited process with limited area is possible to reconstruct the shape of hand very fast. A practical result shows that the position and shape recognition is performed about one second.
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  • A Method to Interpolate Occluded Part of Motion Capture Data by Similar Motion
    Kana HARADA, Hiroshi SHOUJI, Kazuhito MURAKAMI
    Article type: Article
    Session ID: CE2009-43/ME2009-118
    Published: August 03, 2009
    Released on J-STAGE: September 20, 2017
    DOIhttps://doi.org/10.11485/itetr.33.33.0_25
    CONFERENCE PROCEEDINGS FREE ACCESS
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    When we get 3-D positions by using motion capture system, some markers are occluded and the data are lost. We construct a new automatic method to interpolate them by using similar motion data. This paper describes a method to adjust them in the time and spatial domains by DP matching and affine transform, respectively.
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  • Reduction of Luminance Variation in Multi-viewpoint Texture Mapping for 3D Models
    Tomohiro Isono, Toshiyuki Yoshida
    Article type: Article
    Session ID: CE2009-44/ME2009-119
    Published: August 03, 2009
    Released on J-STAGE: September 20, 2017
    DOIhttps://doi.org/10.11485/itetr.33.33.0_29
    CONFERENCE PROCEEDINGS FREE ACCESS
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    A construction of a whole 3D model requires acquisition of ranges as well as textures for a target object from several directions. However, texture-mapping from more than one direction often introduces a variation of luminance among textures mapped on to the 3D model. To reduce the variation, in a literature, a weighted averaging has been applied for a set of texture images that corresponds to each point on the 3D model. However, this technique deteriorates details or a feel of material of texture surface without pixel-level precision of the 3D model. To alleviate the problem, this paper utilizes a single texture image for each polygon, and reduces the luminance variation among textures by modifying them based on the overlapping of the images on each polygon.
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  • [title in Japanese]
    Article type: Appendix
    Pages App1-
    Published: August 03, 2009
    Released on J-STAGE: September 20, 2017
    DOIhttps://doi.org/10.11485/itetr.33.33.0_App1
    CONFERENCE PROCEEDINGS FREE ACCESS
    Download PDF (84K)
  • [title in Japanese]
    Article type: Appendix
    Pages App2-
    Published: August 03, 2009
    Released on J-STAGE: September 20, 2017
    DOIhttps://doi.org/10.11485/itetr.33.33.0_App2
    CONFERENCE PROCEEDINGS FREE ACCESS
    Download PDF (84K)
  • [title in Japanese]
    Article type: Appendix
    Pages App3-
    Published: August 03, 2009
    Released on J-STAGE: September 20, 2017
    DOIhttps://doi.org/10.11485/itetr.33.33.0_App3
    CONFERENCE PROCEEDINGS FREE ACCESS
    Download PDF (84K)
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