JPEG2000 ENCODER FOR REDUCING TILING ARTIFACTS AND ACCELERATING THE CODING PROCESS

摘要

This paper proposes novel techniques for reducing tiling artifacts and encoding time which are two of the largest problems with the JPEG2000 encoder. The proposed method detects tiling artifacts during the coding process and reduces them automatically using tile-boundary adaptive post-quantization. It also provides a higher speed JPEG2000 coding process. This accelerated performance was obtained by predicting the truncation points using the entropy of wavelet transform coefficients prior to the arithmetic coding. This encoding method also requires no additional processing in the decoder. In the experiment, it was subjectively confirmed that tiling artifacts were greatly reduced and that the coding process was considerably accelerated.