Accession Number : AD0713901

Title :   Use of SC4060-Produced Microfilm Output in Pseudocolor Transformations,

Corporate Author : RAND CORP SANTA MONICA CALIF

Personal Author(s) : Lamar,Jeannine V.

Report Date : SEP 1970

Pagination or Media Count : 10

Abstract : The human eye can distinguish only about 15 or 20 shades of gray in a complex black-and-white image. If the image is in color, far more distinctions can be made. Thus the representation of black-and-white original material by a chromatic presentation (pseudocolor) permits the eye to more rapidly or accurately interpret the data. This is one of the objectives of the image enhancement research. A computer-generated pseudocolor transformation of a black-and-white image was produced by assigning a chromaticity-luminance in the pseudocolor image to correspond to each shade of gray in the original image. Intermediate black-and-white records called 'pseudocolor separations' were produced, either photographically or by computer. These separations are of varying densities and control the amount of light which falls on the color material during the printing process. (Author)

Descriptors :   (*PHOTOINTERPRETATION, *COLORS), (*PHOTOGRAPHIC IMAGES, *COLORING), PHOTOGRAPHIC TONE, PHOTOINTERPRETABILITY, COMPUTER PROGRAMMING, DENSITY

Subject Categories : Photography

Distribution Statement : APPROVED FOR PUBLIC RELEASE