Accession Number : ADD008361

Title :   Technique for DC Restoration in AC Coupled Display Systems.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Jones,George R ; Raimondi,Peter K

Report Date : 22 Jul 1980

Pagination or Media Count : 9

Abstract : Described is a technique for DC restoration in AC coupled display systems which includes histogramming, more specifically calculation of histogram values, of the difference in gray levels between two adjacent picture lines on a picture element by picture element (pixel-by-pixel) basis. The gray level obtaining the maximum number of occurrences is considered the mode of the histogram values. This mode used as an addition factor to every pixel of one of the lines, to add a predominating background level or DC component thereto, which is used to create the difference of gray levels between the next two adjacent picture lines. This addition sequence is carried on throughout the entire image frame. (Author)

Descriptors :   *Patents, *Image processing, *Direct current, *Image restoration, *Gray scale, Alternating current, Coupling(Interaction), Signal processing, Multiplexing, Feedback, Histograms, Microprocessors, Memory devices, Infrared detectors, Arrays

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE