Videos footage from RuCCS Colloquium Talks can be found on the RuCCS YouTube Channel. For all other events, please check the sponsor's website for more detail.
To filter by event category, click on the event category link in the table below or use the menu on the right.
List of Past Events
The perceptual organization of orientation-defined textures: Differential geometry, psychophysics, and visual cortex
Ohad Ben-Shahar
Monday, May 17, 2004, 02:00pm - 03:00pm
http://www.cs.yale.edu/~sharar
Orientation-defined textures (ODT) are of a particular significance to low and intermediate level vision, and here we investigate them from a computational, psychophysical, and physiologicial perspectives. Geometrically, we show that two curvatures arise, which describes the textures local behavior and which are used to develop a theory of ODT "good continuation" that extends common terminology from Gestalt psychology. Computationally, we then use this theory for the contextual organization of globally (piecewise-) coherent flows from noisy and locally incoherent measurements, a biologically motivated computation which we apply and demonstrate on texture, shading, and color images. We further extend the formal analysis to novel psychophysical findings in orientation-based texture segmentation, as well as to a new functional explanation for basic aanatomical features of the primary visual cortex.
This email address is being protected from spambots. You need JavaScript enabled to view it.
