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| Presentation | 2008-03-10 13:40 Selection of Viewpoint and Light Source Position Based on Contrast Information Quantities for 3D Objects with Triangular Patch Expressions Tatsuro Kato, Takeo Ikai (Osaka Pref Univ.), Koji Watanabe (Fukuyama Univ.), Shigeki Aoki, Takao Miyamoto, Kunio Fukunaga (Osaka Pref Univ.)  IE2007-291 PRMU2007-275 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | This paper first describes viewpoint selection that grasps total features of an object．We define Fechner type information quantity based on Fechner’s law，and introduce edge type shape information quantity measuring length and sharpness of an edge line in triangular patch expression of a 3D object and viewpoint information quantity summing up information quantities of visible edge lines from a viewpoint，whose local maximums provide representative viewpoints．For lighting of single light source,we define in this study contrast information quantity as deference of shade of visible both faces of edge line from a viewpoint. We next introduce light source viewpoint information quantity summing up selectively contrast information quantities corresponding to medium tone of deference of shade，and then obtain a viewpoint that grasps adequately convex or concave shape of an object by means of lighting．Local maximums of light source viewpoint information quantity provide candidates of viewpoints that grasp such features of a 3D object．Finally experimental results and estimation are presented． | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Light source viewpoint selection / Fechner information quantity / Shape information quantity / Contrast information quantity / Triangular patch expression / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 107, no. 539, PRMU2007-275, pp. 187-192, March 2008. | |
| Paper # | PRMU2007-275 | |
| Date of Issue | 2008-03-03 (IE, PRMU) | |
| ISSN | Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | IE2007-291 PRMU2007-275 |
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| Conference Information | |
| Committee | PRMU IE |
| Conference Date | 2008-03-10 - 2008-03-11 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | JAIST |
| Paper Information | |
| Registration To | PRMU |
| Conference Code | 2008-03-PRMU-IE |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Selection of Viewpoint and Light Source Position Based on Contrast Information Quantities for 3D Objects with Triangular Patch Expressions |
| Sub Title (in English) | |
| Keyword(1) | Light source viewpoint selection |
| Keyword(2) | Fechner information quantity |
| Keyword(3) | Shape information quantity |
| Keyword(4) | Contrast information quantity |
| Keyword(5) | Triangular patch expression |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Tatsuro Kato |
| 1st Author's Affiliation | Graduate School of Engineering , Osaka Prefecture University (Osaka Pref Univ.) |
| 2nd Author's Name | Takeo Ikai |
| 2nd Author's Affiliation | Graduate School of Engineering , Osaka Prefecture University (Osaka Pref Univ.) |
| 3rd Author's Name | Koji Watanabe |
| 3rd Author's Affiliation | Fukuyama University (Fukuyama Univ.) |
| 4th Author's Name | Shigeki Aoki |
| 4th Author's Affiliation | Faculty of Liberal Arts and Sciences , Osaka Prefecture University (Osaka Pref Univ.) |
| 5th Author's Name | Takao Miyamoto |
| 5th Author's Affiliation | Faculty of Liberal Arts and Sciences , Osaka Prefecture University (Osaka Pref Univ.) |
| 6th Author's Name | Kunio Fukunaga |
| 6th Author's Affiliation | Graduate School of Engineering , Osaka Prefecture University (Osaka Pref Univ.) |
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| Speaker | Author-1 |
| Date Time | 2008-03-10 13:40:00 |
| Presentation Time | 30 minutes |
| Registration for | PRMU |
| Paper # | IE2007-291, PRMU2007-275 |
| Volume (vol) | vol.107 |
| Number (no) | no.538(IE), no.539(PRMU) |
| Page | pp.187-192 |
| #Pages | 6 |
| Date of Issue | 2008-03-03 (IE, PRMU) |
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