05809178 is referenced by 78 patents and cites 2 patents.

A method and system eliminates visible quantizing artifacts in a digital image. The present invention eliminates visible artifacts by determining a function descriptive of a noise model for an input source of image data, utilizing a critical noise/quantizing factor in conjunction with the noise model function to determine a quantization function, and deriving optimum coding for the image data from the quantization function to produce digital image data lacking visible quantization artifacts. The critical noise/quantizing factor is a constant value found to be a value of 3/8. The present invention further includes deriving inverse coding for the optimum coding to allow processing of the digital image.

Title
Elimination of visible quantizing artifacts in a digital image utilizing a critical noise/quantizing factor
Application Number
8/661524
Publication Number
5809178
Application Date
June 11, 1996
Publication Date
September 15, 1998
Inventor
George W Dalke
Palo Alto
CA, US
Eric C Anderson
San Jose
CA, US
Agent
Sawyer & Associates
Assignee
Apple Computer
CA, US
IPC
H04N 1/409
H04N 1/40
G06K 9/38
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