Computer Comparison of Pictures

Abstract

This dissertation reports the development of digital computer techniques for detecting changes in scenes by normalizing and comparing pictures which were taken from different camera positions and under different conditions of illumination. The pictures are first geometrically normalized to a common point of view. Then they are photometrically normalized to eliminate the differences due to different illumination, camera characteristics, and reflectance properties of the scene due to different sun and view angles. These pictures are then geometrically registered by maximizing the cross correlation between areas in them. The final normalized and registered pictures are then differenced point by point.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1971
Accession Number
AD0785172

Entities

People

  • Lynn H. Quam

Organizations

  • Stanford University

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Materials and Manufacturing Processes
  • Space

DTIC Thesaurus Topics

  • Artificial Intelligence
  • Cameras
  • Computer Science
  • Computers
  • Coordinate Systems
  • Cross Correlation
  • Dead Reckoning
  • Detection
  • Distortion
  • Grids
  • Image Processing
  • Jet Propulsion
  • Photographs
  • Scattering
  • Spacecraft
  • Three Dimensional
  • Two Dimensional

Readers

  • Computer Vision.