IPAB Seminar - 14/09/2017 Speaker: Prof. Ko Sakai Title: Cortical Representation of Figure and Shape - Towards understanding the construction of an object in the visual cortex Abstract: Figure-ground (FG) segregation, a process to separate an object from background in a visual scene, is a crucial step toward object recognition in the visual cortex. The determination of a figural region contributes directly to the representation of an object shape. Physiological studies have reported that cells in the visual area V2 determine the direction of figure along a border (in natural images, Williford and von der Heydt, 2016). It is expected that the following cortical areas construct a figural region as a surface that leads to the representation of a primitive object shape. We investigated whether the intermediate-level visual areas represent information capable of determining figural regions in natural image patches by combining monkey electrophysiology, human psychophysics and computational modeling. Our results suggest that the intermediate-level visual areas construct a surface-based representation of a figural region, and that the surround modulation with a spatial pooling mechanism plays a crucial role in the FG segregation. Sep 14 2017 12.45 - 13.45 IPAB Seminar - 14/09/2017 Prof. Ko Sakai - University of Tsukuba IF 4.31/4.33
IPAB Seminar - 14/09/2017 Speaker: Prof. Ko Sakai Title: Cortical Representation of Figure and Shape - Towards understanding the construction of an object in the visual cortex Abstract: Figure-ground (FG) segregation, a process to separate an object from background in a visual scene, is a crucial step toward object recognition in the visual cortex. The determination of a figural region contributes directly to the representation of an object shape. Physiological studies have reported that cells in the visual area V2 determine the direction of figure along a border (in natural images, Williford and von der Heydt, 2016). It is expected that the following cortical areas construct a figural region as a surface that leads to the representation of a primitive object shape. We investigated whether the intermediate-level visual areas represent information capable of determining figural regions in natural image patches by combining monkey electrophysiology, human psychophysics and computational modeling. Our results suggest that the intermediate-level visual areas construct a surface-based representation of a figural region, and that the surround modulation with a spatial pooling mechanism plays a crucial role in the FG segregation. Sep 14 2017 12.45 - 13.45 IPAB Seminar - 14/09/2017 Prof. Ko Sakai - University of Tsukuba IF 4.31/4.33
