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Paper Abstract and Keywords
Presentation 2008-07-15 13:10
Possible inhibitory interaction between feature maps in visual search selection
Yuta Senzai, Tadashi Ogawa (Kyoto Univ.) NC2008-32
Abstract (in Japanese) (See Japanese page) 
(in English) An object differing from its surrounding objects in basic feature dimensions is salient and automatically draws our attention. In theoretical models of visual search or attention, information on stimulus features is separately computed in parallel in a set of feature-specific, retinotopically organized maps (feature maps) in the early stage of visual processing. Activities in the individual feature maps are then integrated at a later stage to produce activity representing the importance of individual stimuli at each retinal location (saliency map). To know how the brain computes visual saliency using the signals from individual feature maps, we developed a visual search task for human subjects. In this task, subjects were instructed to make saccades to a singleton target, which is different from surrounding stimuli in the color, shape, or both dimension. We used saccade latency as an indicator of visual saliency and examined how the visual saliency of the target changed by combining the shape and color dimensions. Generally, the mean saccade latency was reduced when the target-defining dimension was changed from a single-dimension (either shape or color dimension) to multi-dimensions (both shape and color dimensions). The magnitude of the reduction in saccade latency was large when the average saccade latency for the shape singleton target and that for the color singleton target were almost the same. However, it was small when the average saccade latency for the shape singleton target and that for the color singleton target were quite different. This result may be well explained by mutual inhibitory connections between feature maps.
Keyword (in Japanese) (See Japanese page) 
(in English) attention / visual saerch / saccade / feature dimension / feature map / saliency map / /  
Reference Info. IEICE Tech. Rep., vol. 108, no. 130, NC2008-32, pp. 1-6, July 2008.
Paper # NC2008-32 
Date of Issue 2008-07-08 (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 NC2008-32

Conference Information
Committee NC  
Conference Date 2008-07-15 - 2008-07-15 
Place (in Japanese) (See Japanese page) 
Place (in English) Kyoto Univ. (Yoshida campus) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Recording and analysis of neuronal activity, etc 
Paper Information
Registration To NC 
Conference Code 2008-07-NC 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Possible inhibitory interaction between feature maps in visual search selection 
Sub Title (in English)  
Keyword(1) attention  
Keyword(2) visual saerch  
Keyword(3) saccade  
Keyword(4) feature dimension  
Keyword(5) feature map  
Keyword(6) saliency map  
Keyword(7)  
Keyword(8)  
1st Author's Name Yuta Senzai  
1st Author's Affiliation Kyoto Univercity (Kyoto Univ.)
2nd Author's Name Tadashi Ogawa  
2nd Author's Affiliation Kyoto Univercity (Kyoto Univ.)
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Speaker Author-1 
Date Time 2008-07-15 13:10:00 
Presentation Time 25 minutes 
Registration for NC 
Paper # NC2008-32 
Volume (vol) vol.108 
Number (no) no.130 
Page pp.1-6 
#Pages 6 
Date of Issue 2008-07-08 (NC) 

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