Accession Number : ADD008955

Title :   Photographic Image Quality Assessment.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Kuperman,Gilbert G

Report Date : 28 Jul 1981

Pagination or Media Count : 16

Abstract : This invention relates to photographic image quality assessment apparatus and method, and more particularly to the objective measurement of photographic system performance. Aerial photography is a major resource in satisfying intelligence and mapping requirements. The Air Force has a quality assurance program for photographic collection systems and has established requirements for developing nominal performance standards for each system. An object of the invention is to provide for simplified and less expensive machine based image assessment, as compared to procedures utilizing microdensitometers. According to the invention, an array of solid state detectors is used with programmable processing technology to measure photographic system performance. The invention provides for the rapid and accurate digitization of an image into transmission/density units, digital processing of these values, and the production of analytic estimates of total photographic system performance based on spatial and/or spatial frequency information derived from the sampled image. The invention employs a physically unitized detector array to provide a fixed spatial relationship between all sampling positions and an integrated programmable processor to perform high speed data acquisition and processing.

Descriptors :   *Patent applications, *Photographic analysis, *Photodetectors, Densitometers, Arrays, Solid state electronics, Weighting functions, Aerial photographs, Photographic images, Spatial filtering, Digital systems

Subject Categories : Cartography and Aerial Photography
      Optical Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE