Accession Number : AD0480352

Title :   SPATIAL FREQUENCY FILTERING.

Descriptive Note : IRIA State-of-the-art rept.,

Corporate Author : MICHIGAN UNIV ANN ARBOR INST OF SCIENCE AND TECHNOLOGY

Personal Author(s) : Alward, James L.

Report Date : DEC 1965

Pagination or Media Count : 129

Abstract : The basic approaches to the analysis of image-plane spatial filtering are discussed. A review of Fourier transforms and transfer function analysis is given; expressions for the time-dependent output of several reticle devices are calculated; background measurements intended for use with transfer-function spatial filter analysis are reviewed; and two approaches to frequency-domain optimization of spatial filters are discussed. (Author)

Descriptors :   *INFRARED DETECTORS, *OPTICS, ELECTROMAGNETIC WAVE FILTERS, OPTICAL FILTERS, INTEGRAL TRANSFORMS, INFRARED IMAGES, MATHEMATICAL ANALYSIS, RETICLES, MATHEMATICAL MODELS, FUNCTIONS(MATHEMATICS), FOURIER ANALYSIS, PROBABILITY, OPTICAL IMAGES, GEOMETRY, INFRARED SCANNING, FREQUENCY, INTEGRALS, DENSITY, DELAY LINES, OPTIMIZATION, INFRARED OPTICAL SYSTEMS, TIME, ELECTROMAGNETIC RADIATION, MATCHED FILTERS, CORRELATION TECHNIQUES, STATE OF THE ART.

Subject Categories : Electrical and Electronic Equipment
      Infrared Detection and Detectors
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE