×

Apparatus for generating a two-dimensional coloured display

  • US 4,930,010 A
  • Filed: 12/27/1988
  • Issued: 05/29/1990
  • Est. Priority Date: 01/11/1988
  • Status: Expired due to Term
First Claim
Patent Images

1. Apparatus for generating a two-dimensional coloured display in which there is a variation of colour across the display in a predetermined manner, the colour of each pixel in the display being defined by at least one colour components, the apparatus comprising, for each colour component, a memory for storing a pair of gradation curves (X(i), Y(i)) representing the variation in intensity of said colour component in orthogonal directions X, Y across said display;

  • processing means for determining a resultant colour component value V(i,j) for a pixel to be displayed at a location (i,j) in said display in accordance with the following formula;

    
    
    space="preserve" listing-type="equation">V(i,j)=f[a(X(i)b(Y(j))+c(X(i)d(Y(j))]where the pixel has coordinates i,j and k is a normalizing constant, and where a, c, are functions of X(i), b, d are functions of Y(j) and f is an output function, said functions being chosen such that V(i,j) exhibits no discontinuities for all values of X(i), Y(j); and

    display means, responsive to said resultant colour component values V(i,j) for displaying a corresponding colour at a position in said display corresponding to that pixel.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×