Accession Number:

ADA109560

Title:

A Method for Finding Pairs of Anti-Parallel Linear Features

Descriptive Note:

Technical rept.

Corporate Author:

MARYLAND UNIV COLLEGE PARK COMPUTER SCIENCE CENTER

Personal Author(s):

Report Date:

1980-09-01

Pagination or Media Count:

51.0

Abstract:

A method for finding anti-parallel straight edges is presented and discussed. This method is based on information about the object sides of edges, the similarity and homogeneity of gray level between the edges, the angle difference, the amount of overlap, and also information about the estimated object gray level. Two figures of merit are defined to calculate the mutual support of two antiparallel linear features. Examples are shown of applying the method to high resolution aerial photographs. Results indicate that cultural features such as roads and buildings can be extracted and that a significant reduction in the complexity of the image description can be obtained. This algorithm should be especially useful in a relaxation type scheme for classifying linear feature segments when the degree of anti-parallelism of the segments is needed.

Subject Categories:

  • Human Factors Engineering and Man Machine Systems

Distribution Statement:

APPROVED FOR PUBLIC RELEASE