COLOR QUANTIZATION METHOD IN COLOR IMAGE

摘要

PPROBLEM TO BE SOLVED: To provide a method for quantizing a color image with a simple image processing algorithm at a high calculation speed in a color symbol level. PSOLUTION: A method for assigning color symbols to image pixels includes steps of: selecting a luminance value from a discrete set of quantized luminance values; selecting a chrominance value from a ordered discrete set of quantized chrominance values; and generating a color symbol from an index of the selected luminance value and an index of the order of the selected chrominance value. In one embodiment of this invention, each discrete chrominance value is selected from a Fibonacci lattice on a fixed luminance plane in a color space such as Lab or Luv which is uniform in perception. PCOPYRIGHT: (C)2010,JPO&INPIT