delet.rar_denoising image

% % load tire % % figure % % subplot(1,2,1) % % imagesc(X) % % colormap(gray) % % load tire; % figure % subplot(2,2,2) % imagesc(X) % colormap(gray) % % % X contains the loaded image. % % map contains the loaded colormap. % nbcol = size(map,1); % % % Perform single-level decomposition % % of X using db1. % [cA1,cH1,cV1,cD1] = dwt2(X,'db1'); % % % Images coding. % cod_X = wcodemat(X,nbcol); % cod_cA1 = wcodemat(cA1,nbcol); % cod_cH1 = wcodemat(cH1,nbcol); % cod_cV1 = wcodemat(cV1,nbcol); % cod_cD1 = wcodemat(cD1,nbcol); % dec2d = [... % cod_cA1, cod_cH1; ... % cod_cV1, cod_cD1 ... % ]; % figure % subplot(2,2,1) % imagesc(dec2d) % colormap(gray) %new load tire figure subplot(3,3,1) imagesc(X) colormap(gray);title('original image'); % X contains the loaded image. % Perform decomposition at level 2 % of X using db4. [c,s] = wavedec2(X,2,'db4'); % Reconstruct approximation and details % at level 1, from coefficients. % This can be done using wrcoef2, or % equivalently using: % % Step 1: Extract coefficients from the % decomposition structure [c,s]. % % Step 2: Reconstruct using upcoef2. siz = s(size(s,1),:); ca1 = appcoef2(c,s,'db4',1); % figure subplot(3,3,2) imshow(ca1);title('approximation coeffi.'); imagesc(ca1) % colormap(gray) a1 = upcoef2('a',ca1,'db4',1,siz); % figure subplot(3,3,3) imshow(a1);title('approximation coeffi. reconstructed by db4'); % imagesc(a1) % colormap(gray) chd1 = detcoef2('h',c,s,1); % figure subplot(3,3,4) imshow(chd1);title('horizontal coeffi.'); % imagesc(chd1) % colormap(gray) hd1 = upcoef2('h',chd1,'db4',1,siz); % figure subplot(3,3,5); imshow(hd1);title('horizontal coeffi. reconstructed by db4'); % imagesc(hd1) % colormap(gray) cvd1 = detcoef2('v',c,s,1); % figure subplot(3,3,6) imshow(cvd1);title('vertical coeffi.'); % imagesc(cvd1) % colormap(gray) vd1 = upcoef2('v',cvd1,'db4',1,siz); % figure subplot(3,3,7) imshow(vd1);title('vertical coeffi reconstructed by db4'); % imagesc(vd1) % colormap(gray) cdd1 = detcoef2('d',c,s,1); subplot(3,3,8) imshow(cdd1);title('digonal coeffi.'); % imagesc(cdd1) % colormap(gray) dd1 = upcoef2('d',cdd1,'db4',1,siz); % figure subplot(3,3,9) imshow(dd1);title('digonal coeffi reconstructed by db4'); % imagesc(dd1) % colormap(gray)