G - Physics – 09 – G
Patent
G - Physics
09
G
375/32, 350/41,
G09G 5/02 (2006.01) H04N 9/76 (2006.01)
Patent
CA 1119287
Abstract of the Disclosure An improved video display system is provided in which two color images are combinable in a dynamic and self-determining fashion to pro- vide improved contrast, comprehension and display versatility. Two separate video signals that are to be used in generating a single dis- play are converted into sequences of digitally encoded picture ele- ments (pixels). Control signals are generated that are dependent upon the data content of the elements in at least one of the sequences, and these signals are used to govern the mode of combination of the two video signals for individual pixel sets. For example a first video sig- nal of digital character and having varying pixel intensity may be trans- formed into color values for a first pseudocolor display. A second video signal, derived from an analog source, is digitized and is also transformed into pseudocolor, concurrent with the dynamic generation in real time of the data dependent control signals. Such control signals may be incorporated in either or both of the digitized data sequences, and the second video signal may be digitized with or without adjustment of intensity ranges within variable limits. The two transformed digital signal sequences are then arithmetically or logically combined in ac- cordance with the functions defined by the data dependent control signals. For example, the signals may be added, ANDed, ORed, averaged, subtracted, or one or the other can be blocked, and these functions can be varied, dependent upon the data, in incremental fashion within the display. Consequently, the contrast between the two color images can be selectively enhanced, the data contained in the images can be much more clearly de- picted in graphical form, and special effects can be obtained in versa- tile and discretionary fashion.
310047
Giddings Gary M.
Langdon Glen G. Jr.
Malowany Alfred S.
Williams Robin
International Business Machines Corporation
Na
LandOfFree
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