🚀 go-pugleaf

            DEPARTMENT OF COMPUTER SCIENCE
              COLORADO STATE UNIVERSITY

                     BARNEY'S
             MONDAY AFTERNOON CLUB SEMINAR

	Speaker:	Bruce Draper
			Computer Science Department
			Colorado State University

	   Date:	October 14, 1996
	   Time:	3:30 - 4:30 p.m.
	  Place:	100 USC

	   Refreshments:  following the talk


       Knowledge-Directed Vision, Past and Future

  The knowledge-directed approach to image interpretation, 
  popular in the 1980's, sought to identify objects in 
  unconstrained two-dimensional images and to determine the 
  three-dimensional relationships between these objects and 
  the camera.  Among the issues faced by these systems were 
  variations among instances of a class; differences in 
  attributes among object class definitions (e.g., shape, 
  color, texture, size, context, substructures); and handling 
  uncertainty.  Knowledge-based systems tried to overcome 
  these problems by applying large amounts of object- and 
  domain-specific knowledge to interpretation problems.

  In this talk we argue that knowledge-directed vision 
  systems failed for two reasons. The first is that the 
  low- and mid-level vision procedures that were relied 
  upon to perform the basic tasks of vision were too 
  immature at the time to support the lofty interpretation 
  goals of these systems.  This problem, we conjecture, 
  has been largely solved by recent advances.  The other 
  impediment was that the control problem for computer 
  vision was never properly addressed as an independent 
  problem. This talk will conclude with a brief review of 
  several new projects which, although still in the early 
  stages of development, address the complex control issues 
  that continue to obstruct the development of knowledge-
  based and model-based vision systems.

 Note: this talk is based on the paper "Knowledge-Directed 
 Vision: Control, Learning and Integration" by B. Draper, 
 A. Hanson and E. Riseman, to appear in this November's 
 issue of the Proceedings of the IEEE.