This program adds noise to the image selected from the dropdown menu, computes the 2-D Daubechies db3 wavelet transform of the noisy image, thresholds and shrinks (soft thresholds) the resulting wavelet transform, and inverse wavelet transforms the result (see Chapter 7). Setting σ=0 and λ=0 displays the wavelet transform of the selected image.
Sliders: σ=noise strength, λ=threshold.