Accession Number:

ADA159685

Title:

Mellin-Fourier Correlation.

Descriptive Note:

Final technical rept. Jun 82-Jan 84,

Corporate Author:

AIR FORCE ARMAMENT LAB EGLIN AFB FL

Personal Author(s):

Report Date:

1985-08-01

Pagination or Media Count:

53.0

Abstract:

This program evaluates the success of a pattern recognition system which attempts to recognize an object even though the object differs in size and orientation from the object used as a reference. The criteria for recognition were the peak value and shape of the cross correlation function calculated in two dimensions. The cross correlation was performed using Fourier transform techniques to judge the utility of implementing the system using many standards optical components. Size, or scale, invariance was achieved using a logarithmic sampling technique the Mellin transform, and variations on traditional sampling methods were shown to extend the scale invariance predicted by various researchers. The utility of the sampling techniques developed was proven using images acquired from infrared sensors carried aboard helicopters. Limits of practical scale invariance were explored and system design approaches were suggested from the results of numerical experiments carried out in computer simulations.

Subject Categories:

  • Statistics and Probability
  • Infrared Detection and Detectors
  • Optics
  • Human Factors Engineering and Man Machine Systems

Distribution Statement:

APPROVED FOR PUBLIC RELEASE