Apparatus for clipping or limiting color signals to maintain col

Details Apparatus for clipping or limiting color signals to maintain col Apparatus for clipping or limiting color signals to maintain col

1992-03-31

1993-12-28

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 29, H04N 964

Patent

active

052744396

ABSTRACT:
A color video signal processing system determines when one component color signal has been limited by clipping and limits the other component color signals to maintain accurate hue in the reproduced image. In one system, the other color signals are held at their values at the instant the one signal was detected as being clipped until the signal is no longer clipped. In another system, an attenuation function is applied to the unclipped color signals when any one color signal is detected as being clipped.

REFERENCES:
patent: 4047202 (1977-09-01), Poetsch
patent: 4750032 (1988-06-01), Nakayama
patent: 4797733 (1989-01-01), Takagi et al.
patent: 4893180 (1990-01-01), Shigaki et al.
patent: 4987485 (1991-01-01), Hirota
patent: 5038216 (1991-08-01), Easterly et al.
Novak, Carol L. et al. "Obtaining Accurate Color Images for Machine Vision Research," SPIE/Perceiving, Measuring and Using Color, vol. 1250, 1990, pp. 54-68.

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