Original RGB Barbara image.
Left, simulated noisy image (Gaussian noise, sigma = 50). Right, YUV transformation + decimated bi-orthogonal transform + hard thresholding.
Left, YUV transformation + undecimated bi-orthogonal transform + hard thresholding.
Right, YUV transformation + curvelet transform + hard thresholding.
Left, YUV transformation + undecimated bi-orthogonal transform + hard thresholding (zoom). Right, YUV transformation + curvelet transform + hard thresholding (zoom).