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The primary visual cortex creates a bottom-up saliency map

Zhaoping, L; (2005) The primary visual cortex creates a bottom-up saliency map. In: Itti, L and Rees, G and Tsotsos, J, (eds.) Neurobiology of Attention. (pp. 570-575). Academic Press: Burlington. Green open access

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Abstract

It has been proposed that the primary visual cortex (V1) creates a saliency map using autonomous intra-cortical mechanisms. This saliency of a visual location describes the location's ability to attract attention without top-down factors. It increases monotonously with the firing rate of the most active V1 cell responding to that location. Given the prevalent feature selectivities of V1 cells (many tuned to more than one feature dimension), no separate feature maps, or any subsequent combinations of them, are needed to create a saliency map. This proposal has been demonstrated in a biologically based V1 model. By relating the saliencies of the visual search targets or object (texture) boundaries to the eases of the visual search or segmentation tasks, the model accounted for behavioral data such as how task difficulties can be influenced by image features and their spatial configurations. This proposal links physiology with psychophysics, thereby making testable predictions some of which are subsequently confirmed experimentally.

Type: Book chapter
Title: The primary visual cortex creates a bottom-up saliency map
ISBN-13: 9780123757319
Open access status: An open access version is available from UCL Discovery
Additional information: Imported via OAI, 22:14:04 9th Apr 2008
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Computer Science
URI: https://discovery.ucl.ac.uk/id/eprint/5258
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