perform_tv_projection.m

image denoising toolbox in matlab

function [x,err_tv,err_l2] = perform_tv_projection(x0,tau,options)

% perform_tv_correction - perform correction of the image to that it minimizes the TV norm.
%
%   [x,err_tv,err_l2] = perform_tv_projection(x0,tau,options);
%
%   Perform the following projection on the TV ball of radius tau:
%       min_x |x-x0|_2   s.t.   |x|_TV <= tau
%
%   The method use a subgradient projection, as explained in:
%       P.L. Combettes, J.C. Pesquet
%       "Image restoration subject to a total variation constraint"
%       IEEE Transactions on Image Processing 13 n