Fast ITTBC using pattern code on subband segmentation
Sung-shik Koh, Hanchil Kim, Kooyoung Lee, Hong Bin Kim, Hun Jeong, Gang Seok Cho, Chung-Hwa Kim · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2000
Iterated Transformation Theory-Based Coding suffers from very high computational complexity in encoding phase. This is due to its exhaustive search. In this paper, our proposed image coding algorithm preprocess an original image to subband segmentation image by wavelet transform before image coding to reduce encoding complexity. A similar block is searched by using the 24 block pattern codes which are coded by the edge information in the image block on the domain pool of the subband segmentation. As a result, numerical data shows that the encoding time of the proposed coding method can be reduced to 98.82% of that of Joaquin's method, while the loss in quality relative to the Jacquin's is about 0.28 dB in PSNR, which is visually negligible.