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송우진,김지홍 대한전자공학회 1994 ISPACS:Intelligent Signal Processing and Communica Vol.1 No.1
In this paper, we propose a pyramid-structured progressive image transmission scheme in which the quantization error delivery is applied to the transform coefficients To make it possible to deliver and correct the quantization errors to the transform domain, the proposed method is made up of two stage as follows 1) the appropriate decomposition of the difference images into transform input subimages and 2) the quantization error delivery to the lower level Through these procedures, the quantization errors W level k-1 can be completely removed at level k The simulation results show that the proposed method achieves the lossless reproduction of the original image and increases the coding performance even at the intermediate levels.