ETERMINATION OF THE VISIBILITY THRESHOLDS FOFI SUBBAND IMAGE CODING
W C Foiig, K.L. Ho · 1997
In this paper, a method to determine the visibility thrcsholds for a given subband systcm is introduced. Our approach identifies the important worsc case combination of the quantization error in cach basis functiori and determine the corresponding visibility thresholds using results previously measured in the DCT domain. Using th:: proposed method, it is relatively simple to determine the visibility thresholds for any subband system in the YCrCb domain. Simulation results on the Lapped Orthogonal Transform (LOT) show that the visibility thresholds are useful in visually lossless coding and perceptual weighted quantimtion. 1. lNTRODUCTION