4 channel color display adapter and method for color correction

Claim 1

A real time color display processor comprising: (a) memory means for storing three primary color channel variables and a primary intensity variable; (b) interface means for storing or retrieving said primary color channel variables and said primary intensity variable to and from said memory means; (c) look-up table (L.U.T.) means for converting said three primary color channel variables and said primary intensity variable to three corresponding secondary color channel variables and a secondary intensity variable, said L.U.T. means being individually responsive to each one of said primary color channel variables and to substantially only the most significant bits of the other two of said three primary color channel variables to provide said three corresponding secondary channel variables; said three primary color channel variables comprising either a first color set of red, green, blue or a second color set of cyan, magenta, yellow and said secondary channel variables corresponding to said first or second color sets; (d) multiplier and converter means for selectively creating display color channel variables including converter means for selectively inverting all of such secondary channel color variables and multiplier means for multiplying said secondary channel color variables with said secondary intensity variables; (e) switching means for controlling said selective inverting responsive to and actuated by information contained in any one of said primary or secondary intensity variables and said primary or secondary color channel variables; (f) output means for viewing said display color channel variables on a display monitor.