You are here

COSC Seminar Series - Feb. 4

Professor Vlad Wojcik, will be presenting, “Scene Segmentation, In six easy steps” on Tuesday, February 4, 2014 from 11:00 a.m. to 12:00 p.m. in MCJ328. Attached is a poster with further details. All are welcome to attend.


In this presentation we ponder the computational nature of our mental process of 3D scene construction.  Starting from a pair of 2D retinal images we construct a segmented 3D scene full of objects.  We do not worry at first about the classification of these objects into known categories.  The pre-requisite to object classification is scene segmentation, i.e. transformation of our field of view into a scene full of objects, known or unknown. 

This unconscious scene segmentation process, hitherto considered rather obscure, is indeed very simple, but requires a fast and highly specialized parallel computer, if to be performed in real-time.  This is a presentation of seven text and pixel processing problems, starting from an almost trivial one.

The six steps that follow lead to six problems, each obtained by a small and easily graspable generalization of previous problem. The last problem in that sequence is the scene segmentation problem.

After the presentation you will fully understand why all animals have (at least) two eyes, and why human visual cortex is composed of two mirrored computers, each sitting in one of the two brain hemispheres. Furthermore, it will become clear why each of your eyes is connected to both of these computers, and why even catastrophic damage to one of these computers does not lead to blindness.  All this is achieved without any recourse to biology, and offers new appreciation of the power of genetic programming and genetic algorithms.