STUDY OF IMAGE-EVALUATION TECHNIQUES.
Abstract
A study of image evaluation techniques to mathematically describe the lens-film portion of the photoreconnaissance system was carried out. A Fortran IV computer program having unique programming features and based on theoretical and experimental studies of component and system responses was developed. Basically a complex Fourier analysis package, it also contains routines for the film D-log E curve, for adjacency effects, and for generating useful data. Diffraction theory studies, a comprehensive survey of optical transfer function measurement techniques including the Itek image analyzer model II optical transfer function measuring equipment delivered on the contract, and the results of an international lens transfer function measurement study are described. Emulsion response studies which led to the development of a preliminary mathematical model for chemical adjacency effects are described. System studies included the development of resolution prediction using emulsion resolution thresholds, studies of resolution and resolution prediction statistics, objective and subjective relationships in image evaluation, system analysis and modulation transfer function determination using film images, and image prediction. A sponsored symposium on image evaluation is described and comprehensive indexes to the 15 reports previously published under this contract are given. It is concluded that although the full advantages of Fourier analysis are not available because of component nonlinearities and complicated interdependencies, the computer program provides a very useful tool for comparative system analysis. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1966
- Accession Number
- AD0803459
Entities
People
- E. S. Blackman
- G. C. Brock
- R. G. Barakat
- R. H. Dumais
- W. L. Attaya