Accession Number : AD0466577


Title :   STUDY OF IMAGE-EVALUATION TECHNIQUES.


Descriptive Note : Interim engineering rept. no. 12, 15 Apr15 Jul 65.


Corporate Author : ITEK CORP LEXINGTON MA


Report Date : 15 Jul 1965


Pagination or Media Count : 68


Abstract : The primary goal of this program is the development of a valid computational means for determining object to image relationships in photooptical reconnaissance systems. Our attention is currently restricted to the lens-film combination. The investigation has been primarily based on linear transfer function, or spatial frequency, analysis. In the area of lens response, the basic linearity of the optical system makes this analysis valid, if not completely sufficient (e.g., veiling glare is not accounted for by the lens transfer function). In the areas of film response, nonlinear analysis must be resorted to in order to account for the fundamental nonlinearity attested to by the D-log E curve as well as for the much less well understood effects of finite chemical diffusion rate properties commonly called adjacency effects. Because of the many problems in film response analysis, the major emphasis in the program is on emulsion studies. Our research activity is generally separable into lens, film, lens-film system, and computer programming categories. In essence, our experimental and theoretical studies in the lens, film, and lens-film system areas are to provide the conceptual and practical foundations for a computer program that will make possible the calculation of object to image relationships in general lensfilm systems. (Author)


Descriptors :   *AERIAL PHOTOGRAPHY , PHOTOINTERPRETATION , OPTICS , PHOTOGRAPHIC IMAGES , CAMERA LENSES , RECONNAISSANCE FILM , FUNCTIONS(MATHEMATICS) , FEASIBILITY STUDIES , RESOLUTION , STATISTICAL ANALYSIS


Distribution Statement : APPROVED FOR PUBLIC RELEASE