Paper Abstract and Keywords |
Presentation |
2012-03-15 10:15
A retinomorphic image sensor with adaptive contrast sensitivity based on entropy maximization Hirotsugu Okuno, Tetsuya Yagi (Osaka Univ.) NC2011-155 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
We designed and implemented an image sensor system equipped with three bio-inspired coding and adaptation strategies: logarithmic transform, local average subtraction, and feedback gain control. The system includes a field-programmable gate array (FPGA), a resistive network, and active pixel sensors (APS), whose light intensity-voltage characteristics are controllable. The system employs multiple time-varying reset voltage signals for APS in order to realize multiple logarithmic intensity-voltage characteristics, which are controlled so that the entropy of the output image is maximized. The system also employs local average subtraction and gain control in order to obtain images with an appropriate contrast. The designed system was successfully used to obtain appropriate images of objects that were subjected to large changes in illumination. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
image sensor / neuromorphic / efficient coding / adaptation / logarithmic response / / / |
Reference Info. |
IEICE Tech. Rep., vol. 111, no. 483, NC2011-155, pp. 197-202, March 2012. |
Paper # |
NC2011-155 |
Date of Issue |
2012-03-07 (NC) |
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 |
NC2011-155 |
Conference Information |
Committee |
MBE NC |
Conference Date |
2012-03-14 - 2012-03-16 |
Place (in Japanese) |
(See Japanese page) |
Place (in English) |
Tamagawa University |
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(See Japanese page) |
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Paper Information |
Registration To |
NC |
Conference Code |
2012-03-MBE-NC |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
A retinomorphic image sensor with adaptive contrast sensitivity based on entropy maximization |
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image sensor |
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neuromorphic |
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efficient coding |
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adaptation |
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logarithmic response |
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1st Author's Name |
Hirotsugu Okuno |
1st Author's Affiliation |
Osaka University (Osaka Univ.) |
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Tetsuya Yagi |
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Osaka University (Osaka Univ.) |
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Speaker |
Author-1 |
Date Time |
2012-03-15 10:15:00 |
Presentation Time |
25 minutes |
Registration for |
NC |
Paper # |
NC2011-155 |
Volume (vol) |
vol.111 |
Number (no) |
no.483 |
Page |
pp.197-202 |
#Pages |
6 |
Date of Issue |
2012-03-07 (NC) |
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