Selective de-blocking filter for DCT compressed images

Details Selective de-blocking filter for DCT compressed images Selective de-blocking filter for DCT compressed images

1996-08-13

1998-08-18

Rogers, Scott

Image analysis

Image enhancement or restoration

Image filter

382268, G06K 940, G06T 500

Patent

active

057968756

ABSTRACT:
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.

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