DefinePK

Abstract

A psychoacoustic model is well established in an audio coding. A psychoacoustic quite threshold is a basic tool on audio coding. This paper investigates on a quantitative experimental impact on almost lossless image compression based on the concept of psychovisual threshold. This paper proposes a practical image coding on a standard resolution two-dimensional discrete cosine transform (DCT). A psychovisual model is presented following the psychoacoustic quite threshold as a just noticeable difference instead of a quantization table. An experimental result on small and large rectangular images shall be presented. This framework can easily produce higher visual quality images at a competitive compression rate in comparison to an extended adaptive JPEG compression standard.