画像OTC量子化器の最適化 : 統計量, 視覚特性の厳密な考慮

抄録

An Orthogonal Transform Coding (OTC) is discussed, considering the statistics and visual properties in detail. In the design of the quantizer, a perceptual property for luminance and a spatial frequency characteristics of Human Visual System (HVS) are taken into account. New measures to evaluate the performance of OTC are adopted. They are mean square error weighted by an estimation curve of random noise, changes of errors and autocorrelation of errors weighted by spatial freqency charecteristice of HVS. By the aid of computer simulations, the optimum quantizer is designed. This method is especially avariable for 1.0 bit/pixel or more.