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Display system

  • US 4,352,105 A
  • Filed: 09/25/1979
  • Issued: 09/28/1982
  • Est. Priority Date: 09/25/1979
  • Status: Expired due to Term
First Claim
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1. System for generating a control signal for controlling a color display to display signals representative of a first function f(i,j) and a second function g(i,j), where i and j are independent integer variables, comprisingA. g-quantizer means for grouping the values of g(i,j) into a predetermined number (N) of groups, each of said groups corresponding to a predetermined range of the values of g(i,j), each of said ranges corresponding to a first predetermined perceptual color characteristic, wherein said g-quantizer includes means for generating a g-quantized matrix g'"'"'(i,j), where ##EQU4## where g'"'"'(i,j) is an integer, T equals M&



  • S, where M and S are the mode and standard deviation, respectively, of the frequency of occurrence of the respective values o g(i,j) and K is a predetermined constant, and for each (i,j), n is the integer for which the cumulative distribution function of the g values exceeding T evaluated at (i,j) is between ##EQU5## where M is the maximum value of said cumulative distribution function, B. f-quantizer means for grouping the values of f(i,j) into a predetermined number (H) of groups, each of said groups corresponding to a predetermined range of the values of f(i,j), each of said ranges corresponding to a second predetermined perceptual color characteristic, where said secnd predetermined perceptual color characteristic is substantially orthogonal to said first predetermined perceptual color characteristic, wherein said f-quantizer includes means for generating an f-quantized matrix f'"'"'(i,j), where ##EQU6## wherein f'"'"'(i,j) is an integer, fMIN is the minimum value of f(i,j) and fMAX is the maximum value of f(i,j), andc. display map generator means operative for each point (i,j) to generate said control signal P(i,j), where ##EQU7## said control signal being representive of the first and second perceptual color characteristics f'"'"'(i,j) and g'"'"'(i,j), respectively, associated with f(x,y) and g(i,j) for that point.

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