| 摘要 |
A color quantization system for color image displays is disclosed which uses a three-dimensional histogram of an original color image to determine the particular colors of the image to be simultaneously displayed. The number of pels within each sub-space defined on a whole color space of the three-dimensional histogram is calculated, and the subspace having the largest number of pels is selected for display from among the sub-spaces, other than the sub-spaces represented by the colors which have been already selected for simultaneous display, if it is determined that the relationship <IMAGE> is satisfied, wherein M is said largest number of pels, N is the number of all the pels of the original color image to be displayed, A is the number of pels in the sub-spaces represented by the display colors which have already been determined, n1 is the number of all the colors to be simultaneously displayed, and n2 is the number of the colors which have been already determined for display. When this relationship is not satisfied, the size of the sub-space is incremented until a sufficient number of pels are included to select a color, and the selection process is continued until all of the pels have been considered, i.e., N-A=0.
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