Sub-band image coding with incorporating HVS model

This paper presents a subband image coding method with an incorporating HVS model. In this method, an image to be coded is first divided into several frequency bands by a 2D subband analysis system, and then different bands are transformed into the spectral domain through the DCT. HVS models are used to weight the transformed coefficients in accordance with the human eye´s sensitivity to AC energy within different frequency bands; the characteristics of eye´s sensitivity to frequency orientation is also considered. The simulation results show that the coding method has good coding performance. More subjectively, a pleasing decoded image is obtained even at low bit-rates