05629778 is referenced by 100 patents and cites 20 patents.

An image encoding/decoding apparatus for performing transform coding by a method in which blocking artifacts are suppressed or eliminated is disclosed in which encoded data, transmitted by the encoding apparatus, is converted into received image data terms which are subsequently overlap transformed into frequency coefficients for modification by means of a filtering operation utilizing a quantization error matrix. The quantization error matrix can be derived from quantization error data generated in the encoding unit, or can be provided as a look-up table in the decoding unit. The modified frequency coefficients are converted into reduced-noise image data terms for reconstruction into a digital image.

Title
Method and apparatus for reduction of image data compression noise
Application Number
8/441372
Publication Number
5629778
Application Date
May 15, 1995
Publication Date
May 13, 1997
Inventor
Steven R Reuman
Acton
MA, US
Agent
Joseph Stecewycz
Assignee
Polaroid Corporation
MA, US
IPC
G06F 17/14
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