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Understanding VisionTheory, Models, and Data$
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Li Zhaoping

Print publication date: 2014

Print ISBN-13: 9780199564668

Published to Oxford Scholarship Online: August 2014

DOI: 10.1093/acprof:oso/9780199564668.001.0001

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The V1 hypothesis—creating a bottom-up saliency map for preattentive selection and segmentation

The V1 hypothesis—creating a bottom-up saliency map for preattentive selection and segmentation

Chapter:
(p.189) 5 The V1 hypothesis—creating a bottom-up saliency map for preattentive selection and segmentation
Source:
Understanding Vision
Author(s):

Li Zhaoping

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780199564668.003.0005

This chapter gives a full account of the theoretical development and experimental investigations of the hypothesis that the primary visual cortex (V1) creates a bottom-up saliency map to guide visual attention exogenously. The chapter details the background motivations, theoretical formulation, and experimental tests of the hypothesis, as well as a neural circuit model of the primary visual cortex for the underlying neural mechanisms. The hypothesis links two bodies of data: one is of physiological data on intracortical interactions in V1 and the consequent contextual influences in V1 neural responses; the other is of behavioral data on attention capture, visual search, and visual segmentation. In light of the saliency map in V1, the chapter additionally discusses the roles of the extrastriate visual cortices, contrasts the roles of the central and peripheral visual fields, and reflects on the dissociation between attention capture and perceptual awareness.

Keywords:   saliency, V1, primary visual cortex, visual search, saliency map, contextual influences, neural circuit model

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