Accession Number:

AD0600950

Title:

STUDY OF IMAGE-EVALUATION TECHNIQUES.

Descriptive Note:

Interim engineering rept. no. 6, 15 Dec 63-15 Apr 64

Corporate Author:

ITEK CORP WALTHAM MASS

Report Date:

1964-04-15

Pagination or Media Count:

56.0

Abstract:

The objective of the present program is to provide means for calculating resolving power, bar contrast, or the shape and contrast of any kind of image, given the necessary physical parameters for the target and imaging system. In principle, this calculation can always be performed, given the shape and contrast of the target, together with the complex transfer function, D-log E curve, and granularity of the system. The program of physical measurement and computer calculation at present envisaged is described. Emphasis is placed on the calculation of lens performance from design data, development of a mathematical model for the film, and the calculation of images given by a system when the transfer functions for all its components are known. The experiments in simulated aerial photography, and the attempt to correlate psychophysical quality with physical parameters are discussed. The progress made in the measurement of lens transfer functions is described. The appendix gives the results of transfer function measurements made on the 12-inch-focal-length Covogon lens by the Institute of Optical Research, Stockholm, Sweden.

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE