Patent ID: 6633407
Filing Date: 2003-10-14
Classification: G06F,H04N

Abstract:
A HMMD color model having a shape which includes two symmetrical cones merged at flat surfaces, said merged cones including an axis disposed between an apex A and an apex B, comprising:a hue defined as an angle around the AB axis; a diff defined as a vector normal to the AB axis in a direction from the AB axis to a circumference C of the cones; a max value defined as a vector in a direction from the apex B of a bottom one of the cones to the circumference C; a min value defined as a vector in a direction from the circumference C to the apex A of a top one of the cones; and a sum value defined as a vector in a positive direction of the AB axis, wherein each of the max value, the min value, the diff, and the sum value range between 0 and 1 and the hue ranges from 0 to 360, and wherein the HMMD color model is converted from an RGB color model with (r, g, b) color values in accordance with the following equations: max value=maximum value from input r, g, b values; min value=minimum value from the input r, g, b values; diff=max valueâˆ’min value; sum=(max+min)/2; and hue=(gâˆ’b)/(maxâˆ’min)*60, if (r=maxâˆ©(gâˆ’b)&gE;0) (gâˆ’b)/(maxâˆ’min)*60+360, if (r=maxâˆ©(gâˆ’b)<0) (2.0+(bâˆ’r))/(maxâˆ’min)*60, if (g=max) (4.0+(râˆ’g))/(maxâˆ’min)*60, if (g=max) 0, if max=min.