Dictionary-Based Image Denoising by Fused-Lasso Atom Selection

Algorithm 1

Initialization: patch centered in th pixel, is the number of pixels in , , , , ;

(1) Calculate the local gradient matrix of th pixel in ;

(2) Implement the SVD to and computed the parameters by (7);

(3) Compute the covariance matrix by (4);

(4) Compute the by (3);

(5) If , ; otherwise, output the feature vector ;