Image analysis – Image enhancement or restoration – Image filter
Patent
1996-04-24
1999-08-03
Rogers, Scott A.
Image analysis
Image enhancement or restoration
Image filter
382268, 382275, 382250, 358433, 358463, G06T 500, G06T 900, H04N 1409, H04N 1415
Patent
active
059335424
ABSTRACT:
An apparatus and method for post processing image data which previously was encoded using a discrete cosine transform in order to remove resulting blocking effects. Correction coefficients are generated by determining the least mean square error of the blocking error. The correction coefficients are adjusted to be within the quantization range of the quantization step size used during the coding process. The adjusted correction coefficients are then used to generate the correction terms which are subsequently combined with the original image data to generate an image exhibiting reduced blocking effects when the image is displayed.
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Chang Ching-Fang
Lee Chuen-Chien
Rogers Scott A.
Sony Corporation
Sony Electronics Inc.
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