R E S E A R C H  -  D I R E C T I O N L E T S              

Non-linear approximation results

For more details check this publication.


Original image Fingerprint

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