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US4718104A   [0008] 
EP0574969B1   [0013]  [0018] 
US5461655A   [0013]  [0018] 
US2002071600A1   [0014] 
EP527525A   [0040] 

Comparison study of non-linear filters in image processing applications   [0005] 
Digital Image Enhancement and Noise Filtering by use of Local Statistics   [0006] 
Fast Filter Transforms for Image Processing   [0008] 
Fast Computation of the Difference of Low-Pass Transform   [0008] 
A Theory for Multiresolution Signal Decomposition: The Wavelet Representation   [0009] 
Image compression by Gabor Expansion   [0009] 
Image Filtering Using Multiresolution Representations   [0011] 
Edge preserving artefact free smoothing with image pyramids   [0012] 
A Theory for Multiresolution Signal Decomposition: The Wavelet Representation   [0021]