Still image coding algorithm Flush type of DCT-based

摘要

(57) [summary] Flush type DCT based in (EDCT) image coding method, For each bit-plane, the upper-left corner of the DCT block, the image of decoding that provides a good PSNR than the coder of the DCT-based JPEG and previous is obtained in the scanning order of transmission in the order of importance coefficients starting from (corresponding to the DC coefficient). The Flush type bit-stream, encoder occurs. It can be cut at any point of the bit-stream, therefore the decoder is able to reconstruct the image at a lower bit rate. The quality of the image reconstructed at the low rate is equivalent to directly coded in the rate of this image. Reconfiguration without loss most of the image, the accuracy of the DC coefficient is possible up to. The algorithm is very useful fast browsing WWW, database, in various applications such as medical imaging.