Accession Number : ADA187437

Title :   Relaxing the Brightness Constancy Assumption in Computing Optical Flow,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE ARTIFICIAL INTELLIGENCE LAB

Personal Author(s) : Gennert, Michael A ; Negahdaripour, Shahriar

PDF Url : ADA187437

Report Date : Jun 1987

Pagination or Media Count : 26

Abstract : Optical flow is the apparent (or perceived) motion of image brightness patterns arising from relative motion of objects and observer. Estimation of the optical flow requires the application of two kinds of constraint: the flow field smoothness constraint and the brightness constancy constraint. The brightness constancy constraint permits one to match image brightness values across images, but is very restrictive. We propose replacing this constraint with a more general constraint, which permits a linear transformation between image brightness values. The transformation parameters are allowed to vary smoothly, so that inexact matching is allowed. The implementation on a highly parallel computer, is described, sample results presented. Keywords: Optical flow; Brightness constancy assumption; Passive navigation; Smoothness constraint.

Descriptors :   *IMAGE MOTION COMPENSATION, BRIGHTNESS, IMAGES, FLOW, OPTICAL PROPERTIES, NAVIGATION, PASSIVE SYSTEMS, TRANSFORMATIONS, BRIGHTNESS, PATTERNS, LINEAR SYSTEMS, TRANSFORMATIONS(MATHEMATICS), COMPUTERS, PARALLEL PROCESSORS, MOTION, IMAGE PROCESSING

Subject Categories : Optical Detection and Detectors
      Photography

Distribution Statement : APPROVED FOR PUBLIC RELEASE