Selective de-blocking filter for DCT compressed images

摘要

A method and apparatus to selectively post process decompressed image data to minimize blocking effects. Each pair of pixels across a block boundary is examined to determine whether the boundary pixels should be filtered. In one embodiment, if the difference between boundary pixels is less than a first predetermined threshold and the energy along the boundary is less than a second predetermined threshold, the boundary pixels are filtered to produce an output image having minimized blocking effects along block boundaries.