PATTERN WIDTH AT A GIVEN ANGLE,

Abstract

The paper demonstrates that the pattern feature 'width as a function of angle' possesses several possible interpretations. The paper is a review discussing the width concept in pattern recognition and the geometrical concept itself. The object of the work is to clarify how the word description can be made precise so that computer algorithms for feature extraction may be obtained; the focus is on theoretical subject matter. The results consist of a set-theoretic definition of width-at-angle, a theorem relating it to the pattern boundary radius vector, and a description of two alternate widths. All three widths are calculated for an illustrative example; graphical and tabular comparisons are given. Substantial variation in width-at-angle magnitude is found. The principal conclusion is that the set-theoretic width-at-angle is a useful pattern feature when it can be easily computed. Further investigation of the information contained in only part of a width function is recommended for cases where computation of width-at-angle is difficult. (Author)

Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1969
Accession Number
AD0701778

Entities

People

  • Allen Klinger

Organizations

  • University of HawaiĘ»i System

Tags

DTIC Thesaurus Topics

  • Algorithms
  • Boundaries
  • Computational Complexity
  • Computations
  • Computers
  • Extraction
  • Feature Extraction
  • Mathematical Analysis
  • Mathematics
  • Pattern Recognition
  • Recognition

Readers

  • Fluid Dynamics.
  • Graph Algorithms and Convex Optimization.
  • Systems Analysis and Design

Technology Areas

  • AI & ML
  • AI & ML - Bayesian Inference