Accession Number:

AD0457952

Title:

STUDY OF IMAGE-EVALUATION TECHNIQUES.

Descriptive Note:

Interim engineering rept. no. 9, 15 Jul15 Oct 64,

Corporate Author:

ITEK CORP WALTHAM MA

Personal Author(s):

• Attaya, W. L.

Report Date:

1964-10-15

Pagination or Media Count:

45.0

Abstract:

The ultimate goal of this program is the development of a mathematical model that will be useful in the specification, design, and performance testing of reconnaissance systems. At present, we are concentrating on the lens and film components of the photo-optical system. Our immediate tasks fall into two closely related categories 1 the mathematical development of the model, and 2 the establishment of valid and suitably accurate means to measure or calculate the physical characteristics of the lenses and emulsions used. The major effort is being placed in the latter category, where the work is broadly separated into lens, emulsion, and system phases, with the emulsion studies receiving the most emphasis. The computer program is described which represents the first, or linear, phase of our mathematical model. One of the practical problems in the analysis of photographic images using microdensitometry is the smoothing of the trace data. The granular nature of the photographic image makes this a quite necessary part of the data reduction procedure. A simple algorithm has been devised which is applied to the numerical values of the equidistant samples of a microdensitometer trace. The theoretical and experimental phases are reported of our lens study program. Author

Descriptors:

• *PHOTOGRAPHIC RECONNAISSANCE
• *AERIAL RECONNAISSANCE
• MATHEMATICAL MODELS
• PHOTOGRAPHIC IMAGES
• CAMERA LENSES
• PHOTOGRAPHIC FILM
• COMPUTER PROGRAMMING
• OPTICAL IMAGES
• PHOTOINTERPRETATION
• AUTOMATION
• DATA PROCESSING
• FEASIBILITY STUDIES
• DIGITAL SYSTEMS

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE