Example 3 - Dyadic multi-resolution of fingerprint image by wavelet anlysis.

[original] [1 stage] [2 stage] [3 stage] [3 stage unnormalized] [back to main page]

The 2,3, and 4'th  images have the details portion normalized so that they are visible as images.  The last picture is unnormalized and shows that most of the energy is in the three level approximation, (upper left hand corner) showing why wavelet decomposition works well for compression.  The tranforms may be manipulated and then converted back to the original form to achieve some effect such as compression or feature detection.


Stage 1 

Stage 2 

Stage 3 


Stage 3 unnormalized showing compression potential 

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