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Wavelet Transforms

Mon, 02/27/2012 - 03:59 am

I am trying to use 2D wavelet transforms on some of my images and have noticed that the way the transform is presented using the DWT function is different to the that of other published results. I also want to be able to access each level separately and control the number of levels I decompose my image into. Is this possible using IGOR Pro and is it possible to have my results presented in the standard way?

James Bryson

Igor

Hello James,

IGOR's DWT operation (not a function) does not provide intermediate transform outputs. It computes all levels by iterating from dimension=2^n to 2^1. There is nothing that keeps you from taking the complete output and copying out the relevant range of coefficients that you desire. This is essentially what is done internally under the /S and /D flags.

A.G.
WaveMetrics, Inc.

February 27, 2012 at 10:31 am - Permalink