Theory of Edge Detection.

Abstract

A theory of edge detection is presented. (1) Intensity changes, which occur in a natural image over a wide range of scales, are detected separately at different scales. At a given scale, this is best done by finding the zero-crossings of gradient-squared G(x,y) * (I(x,y) for image I, where G(x,y) is a two-dimensional gaussian distribution, and gradient-squared is the Laplacian. (2) The physical phenomena that give rise to the intensity changes are localized. This allows one to construct rules for combining information from the different scales into a primitive description of the image. A physiological model for zero-crossing detection is proposed. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1979
Accession Number
ADA078063

Entities

People

  • D. Marr
  • E. Hildreth

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Air Platforms
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Algorithms
  • Artificial Intelligence
  • Bandwidth
  • Change Detection
  • Computer Stereo Vision
  • Computer Vision
  • Data Displays
  • Detectors
  • Directional
  • Frequency
  • Frequency Domain
  • Gaussian Distributions
  • Information Processing
  • Orientation (Direction)
  • Pattern Recognition
  • Recognition
  • Two Dimensional

Readers

  • Computer Vision.
  • Molecular and Cellular Biology
  • Theoretical Analysis.