Accession Number:

ADA207791

Title:

Determining the Location of an Observer with Respect to Aerial Photographs

Descriptive Note:

Master's thesis

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s):

Report Date:

1988-12-01

Pagination or Media Count:

81.0

Abstract:

In this study, the possibility of using a computer to detect the motion of an observer by comparing two successive aerial photographs is examined. The purpose of the study was to experiment with a technique for finding a point common to both images. The technique presented uses only sharp boundary lines and their distribution in the images to produce the primal sketches of the image. Once the primal sketches are made, the original images are not referred to again. A point common to both images is identified by comparing the number of cells with strong gradient magnitudes and their distribution in 3-pixel by 3-pixel blocks. The technique produces excellent results in analyzing simulated successive photographs, suggesting good results with photographs that are taken in succession by a moving observer. Compared with other work on image correlation and object identification, the technique uses fewer features only two in its primal sketches, and it does not need any human intervention. Possible applications are photo interpretation, high-altitude navigation, and underwater station-keeping. Keywords Theses

Subject Categories:

  • Optical Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE