Accession Number : AD0681492

Title :   PSEUDOCOLOR AS A MEANS OF IMAGE ENHANCEMENT(

Corporate Author : RAND CORP SANTA MONICA CALIF

Personal Author(s) : Sheppard,Joseph J. , Jr. ; Stratton,Roy H. ; Gazley,Carl , Jr

Report Date : JAN 1969

Pagination or Media Count : 34

Abstract : For human observers the number of distinguishably different colors is much larger than the number of distinguishable different shades of gray. Therefore, if the scale of grays in a complex black-and-white image, such as an X-ray, is transformed into some suitable scale of colors, perception of the details in that image will be greatly enhanced. In one versatile but expensive method of producing such pseudocolor images, the black-and-white image is photoelectrically scanned and a computer is used to produce three pseudocolor separation positives (or negatives) directly on 35-mm film. A simpler and inexpensive method has been developed which uses purely photographic procedures. Examples of results with this procedure applied to chromosome photomicrographs, X-ray films, and pathological specimens are presented. (Author)

Descriptors :   (*PHOTOGRAPHIC IMAGES, *COLOR PHOTOGRAPHY), (*RADIOGRAPHY, COLOR PHOTOGRAPHY), PHOTOGRAPHIC CONTRAST, TRANSFORMATIONS, BRIGHTNESS, PHOTOGRAPHIC SCALE, COMPUTER PROGRAMMING, MASKING, BIOPSY, CANCER, CHROMOSOMES, PHOTOGRAPHIC FILTERS, SYMPOSIA

Subject Categories : Medical Facilities, Equipment and Supplies
      Photography

Distribution Statement : APPROVED FOR PUBLIC RELEASE