LastWave Package Dwtrans2d 2.0 Authors Description Examples



Package allowing to perform 2d dyadic wavelet transform decomposition, reconstruction and extrema reconstruction.


Let's run the Demo DemoDWtrans2dWT

This is the original image and its recontrsuction (and error) using the dyadic wavelet transform of the image:

The following window displays the dyadic wavelet transform from which the reconstruction is made. First column corresponds to horizontal edges, second column to vertical edges, third column to the sum of the first two column squared (i.e., the modulus) and last one to the phase. Each row corresponds to a different scale:

Let's run the Demo DemoDWtrans2dWT_10_6

In this demo a noisy image is denoised using the thresholding and reconstruction from the extrema of the dyadic wavelet transform:

The extrema at different scales are represented in the following window: