Post-processing algorithm for DCT-coded image based on human visual system
Jinmei Liu · Computer Engineering and Applications Journal · 2007
The reason that Block Discrete Cosine Transform(BDCT) brings blocking artifacts is analyzed in this paper.An efficiently adaptive de-blocking algorithm is proposed based on maximum a posteriori estimation of Markov Random Field(MRF-MAP) Frame.For Human Visual System has the masking characteristic,a blocking-artifact visible function is introduced.The threshold of the potential energy function is adaptively adjusted by edge information of the shifted block so as to reduce the blocking artifacts as much as possible and protect image edge information.The simulation results prove the efficiency of the proposed method.