HELP! * GREY=local LOCAL HTML version of Foils prepared July 28,1995

Foil 16 How Image wavelet compression works

From Master Foils for HPDC95 Compression Presentation HPDC95 Pentagon City -- August 1,1995. by Roman Markowski and Geoffrey Fox * See also color IMAGE
We have reviewed 1D Wavelet Transform
There are Three steps in 2D Image Case
  • transformation of the image data using a predefined set of basis functions (multiresolution and orthogonal)
  • quantization of the basis function coefficients (lossy)
  • coding of the resulting data set to remove redundancy (Huffman lossless encoding)

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