Relaxing the Brightness Constancy Assumption in Computing Optical Flow,

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.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1987
Accession Number
ADA187437

Entities

People

  • Michael A. Gennert
  • Shahriar Negahdaripour

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Algorithms
  • Artificial Intelligence
  • Boundaries
  • Brightness
  • Coordinate Systems
  • Department Of Defense
  • Discontinuities
  • Environment
  • Equations
  • Flow
  • Flow Fields
  • Illumination
  • Military Research
  • Observers
  • Relative Motion
  • Reliability
  • Two Dimensional

Readers

  • Fluid Dynamics.
  • Operations Research
  • Vision Science/Vision Psychology/Cognitive Neuroscience.