Visual cortical area V2

Zhaoping L., Guyader N., and Lewis A (2009) Relative contributions of 2D and 3D cues in a texture segmentation task, implications for the roles of striate and extrastriate cortex in attentional selection Journal of Vision, 9(11):20, 1-22, http://journalofvision.org/9/11/20/, doi:10.1167/9.11.20

Pre-attentive stereo vision

Most models of early stereo vision focuses on stereo correspondence, i.e., matching the monocular images in the left and right eyes. However, such models omit the problem stereo segmentation such as detecting and highlighting the depth boundaries or enabling a lone depth target to pop out of a background composed of objects at a different depth. Mechanistically, the neural interactions required for stereo correspondence seem to be the opposite of those required for stereo segmentation (to highlight depth edge or depth popout). Here I introduce the first model that addresses both correspondence and segmentation. See Zhaoping L. (2002) Pre-attentive segmentation and correspondence in stereo, Philosophical Transactions of The Royal Society, Biological Sciences, Vol. 357, Number 1428, page 1877-1883 [abstract]

V2 neuron's tuning to surface border ownership via intra-cortical interactions

V2 neurons tuned to oriented contours or surface borders have been observed to have different responses depending on which of the two surfaces on the two sides of the border is perceived to own the border. This is called border ownership, and is important for surface perception since the border is usually percepted to be owned by the occluding surface. Which mechanisms are responsible to generate the tuning to border ownership (BOWN)? Is it from top-down feedbacks from higher visual areas? This paper: Zhaoping L. (2005) Border Ownership from Intracortical Interactions in Visual Area V2 , in NEURON, Vol. 47, 143-153, suggest that BOWN tuning could arise from intra-cortical interactions.