06658162 is referenced by 33 patents.

A method for compressing and decompressing image information. An encoder receives initial image information and transforms said initial information using a linear transform to produce coefficients. These are then locally normalized using a neighborhood masking weighting factor, quantized and coded to result in a compressed bit stream. The compressed bit stream is received at a decoder and an inverse process is applied to reconstruct said image data from the compressed bitstream. Alternatively, the neighborhood-masking factor can be applied after quantization in the rate-distortion optimization process.

Title
Image coding method using visual optimization
Application Number
9/417873
Publication Number
6658162 (B1)
Application Date
October 13, 1999
Publication Date
December 2, 2003
Inventor
Scott Daly
Kalama
WA, US
Shawmin Lei
Camas
WA, US
Wenjun Zeng
Vancouver
WA, US
Agent
Marger Johnson & McCollom
US
Assignee
Sharp Laboratories of America
WA, US
IPC
G06K 9/46
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