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| Presentation | 2013-09-13 14:40 Contrast sensitivity for depth from very large disparity as functions of target velocity Masayuki Sato (Univ. of Kitakyushu), Shoji Sunaga (Kyushu Univ.)  HIP2013-57 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | It is well-known that an excessive disparity causes diplopia and unclear depth impression. However, we recently found that horizontal motion of the targets facilitates stereopsis for very large disparities. To examine the velocity tunings of the responsible mechanisms, we measured contrast sensitivities for depth discrimination as functions of target velocity using one-dimensional DoG targets. The space constants of positive Gaussians were 1.17, 2.34 and 4.67 deg, corresponding to 0.16, 0.08 and 0.04 c/deg peak special frequency, respectively. Two targets (one above and the other below the fixation point) were presented for 0.4 s in a raised cosine temporal window and 4.9 deg crossed and uncrossed disparities were given to one and the other targets. These targets drifted horizontally in the opposite direction with velocity of 0, 7.8, 16, 31, 62, or 125 deg/s. The results show that the highest sensitivity was obtained at around 15-30 deg/s for the smallest targets while the peak velocities were higher for the larger targets. It appears that dynamic mechanisms tuned to that velocity ranges mediate stereopsis for large depth. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Binocular disparity / Depth perception / Motion / Velocity / Spatial frequency / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 113, no. 216, HIP2013-57, pp. 41-43, Sept. 2013. | |
| Paper # | HIP2013-57 | |
| Date of Issue | 2013-09-05 (HIP) | |
| 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 | HIP2013-57 |
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| Conference Information | |
| Committee | HIP |
| Conference Date | 2013-09-12 - 2013-09-13 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | NICT Keihanna building |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Eye Movement and Perception, Control and Measurement of Eye Movement, Accommodation, Pupil, etc. |
| Paper Information | |
| Registration To | HIP |
| Conference Code | 2013-09-HIP |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Contrast sensitivity for depth from very large disparity as functions of target velocity |
| Sub Title (in English) | |
| Keyword(1) | Binocular disparity |
| Keyword(2) | Depth perception |
| Keyword(3) | Motion |
| Keyword(4) | Velocity |
| Keyword(5) | Spatial frequency |
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| Keyword(8) | |
| 1st Author's Name | Masayuki Sato |
| 1st Author's Affiliation | The University of Kitakyushu (Univ. of Kitakyushu) |
| 2nd Author's Name | Shoji Sunaga |
| 2nd Author's Affiliation | Kyushu University (Kyushu Univ.) |
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| Speaker | Author-1 |
| Date Time | 2013-09-13 14:40:00 |
| Presentation Time | 25 minutes |
| Registration for | HIP |
| Paper # | HIP2013-57 |
| Volume (vol) | vol.113 |
| Number (no) | no.216 |
| Page | pp.41-43 |
| #Pages | 3 |
| Date of Issue | 2013-09-05 (HIP) |
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