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.