Two-dimensional adaptive decimation and interpolation scheme for low bit-rate image coding

A novel image compression scheme based on two-dimensional adaptive decimati on is reported in this paper. In this approach, images are encoded with ada ptive sampling along the horizontal and vertical directions, and decoded wi th an edge prediction interpolation algorithm. The method is capable of mai ntaining reasonable coding fidelity at low bit-rate with good visual qualit y As only a small amount of computation is required in the encoding and dec oding processes, the compression scheme can be implemented for real time op eration with simple hardware and a small amount of memory storage. The prop osed scheme had been applied in encoding images at bit-rates between 0.2 an d 0.33 bpp and the results are encouraging. (C) 2000 Academic Press.