Ricerc@Sapienza

The paper presents a method for color quantization (CQ)which uses visual contrast for determining an image-dependent colorpalette. The proposed method selects image regions in a hierarchicalway, according to the visual importance of their colors with respect to thewhole image. The method is automatic, image dependent and requires amoderate computational effort. Preliminary results show that the qual-ity of quantized images, measured in terms of Mean Square Error, ColorLoss and SSIM, is competitive with some existing CQ approaches.