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Non-linear approximation results


For more details check this publication.


 

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Non-linear approximation using the standard wavelet transform and retaining 0.5% coefficients. PSNR = 18.68dB




Non-linear approximation using directionlets and retaining the same number (0.5%) coefficients. PSNR = 19.23dB. In addition, the artifacts have the same orientation as the local dominant orientations across the image and are thus less visually annoying