DCT-based intraframe coding using block grouping algorithm
Shiuh‐Ku Weng, Jyi‐Chang Tsai, Chaur‐Heh Hsieh, Yue‐Dar Jou · 2002
This paper presents a new DCT-based intraframe coding algorithm. The algorithm exploits the interblock correlation by grouping the similar blocks in an image into a category. The center of a category is then encoded with the JPEG algorithm. Simulation results indicate that the proposed algorithm improves the compression efficiency significantly at low bit rate, as compared to JPEG.