Post-processing device for eliminating blocking artifact and met

Details Post-processing device for eliminating blocking artifact and met Post-processing device for eliminating blocking artifact and met

1996-01-19

1999-08-10

Lee, Thomas D.

Image analysis

Image enhancement or restoration

Edge or contour enhancement

382275, 382232, 382254, 358433, G06K 940

Patent

active

059371013

ABSTRACT:
A post-processing device for eliminating a blocking artifact generated upon reconstructing an image compressed by block transform operation and a method thereof minimize a blocking artifact at block boundaries by selecting a predetermined discrete cosine transform (DCT), estimating transform coefficients with respect to the information lost upon quantization or inverse quantization to have the highest continuity with respect to adjacent blocks, performing an inverse transform operation on the estimated transform coefficients, and adding the thus-obtained adjustment value to an inverse-transform-operated reconstructed image signal.

REFERENCES:
patent: 5450531 (1995-09-01), Ng et al.
patent: 5590064 (1996-12-01), Astle

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