Algorithms are investigated for the printing or display of color images at near-original image quality with a minimum number of output colors. Each algorithm consists of a quantizer that is used possibly in conjunction with halftoning. We consider both image-independent and image-dependent quantizers implemented in RGB or in the uniform color space <i>L</i>*<i>u</i>*<i>v</i>*. The halftoning techniques that we use are multilevel extensions of error diffusion and ordered dither. Image quality resulting from the use of these algorithms is measured by subjective evaluation.
© 1990 Optical Society of America
Ronald S. Gentile, Eric Walowit, and Jan P. Allebach, "Quantization and multilevel halftoning of color images for near-original image quality," J. Opt. Soc. Am. A 7, 1019-1026 (1990)