Apparatus for providing an indication that a color represented b

Details Apparatus for providing an indication that a color represented b Apparatus for providing an indication that a color represented b

1986-04-08

1987-11-17

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 30, 358 80, 358 81, H04N 1702, H04N 967, G03F 308

Patent

active

047077271

ABSTRACT:
Apparatus for providing an indication that a color represented by a color video signal having a luminance component Y and two color difference components R-Y, B-Y is validly reproducible on an RGB color display device. A resistive matrix converts the Y, R-Y, B-Y components of the color video signal to three primary color components R, G, B. Comparators compare the amplitude of each primary color component with predetermined minimum and maximum values, and an OR-gate produces a gamut error signal if the amplitude of one or more of the primary color components is outside the range established by the corresponding predetermined minimum and maximum values. The gamut error signal is applied to a display modifier which modifies the luminance and color difference components to produce a visually distinct effect on a waveform or display monitor. Alternatively, the gamut error signal may be applied to, for example, a color shutter incorporated in the waveform or display monitor to modify the color of the display.

REFERENCES:
patent: 4058828 (1977-11-01), Ladd
patent: 4189742 (1980-02-01), Klopsch
patent: 4285009 (1981-08-01), Klopsch
patent: 4488171 (1984-12-01), Pugsley et al.
patent: 4500919 (1985-02-01), Schreiber
Baker, Dan, "New and Unique Method for Measuring Video Analogue Component Signal Parameters", publication and date unknown, pp. 98-109.

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