[LoD,HiD] = wfilters('haar','d'); how can i use this in DWT as a key.? Or how i can use DWT with key .

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Sultan Mehmood 2018-10-22

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https://ww2.mathworks.cn/matlabcentral/answers/425453-lod-hid-wfilters-haar-d-how-can-i-use-this-in-dwt-as-a-key-or-how-i-can-use-dwt-with-ke

load sculpture imagesc(X) colormap gray [LoD,HiD] = wfilters('haar','d'); [cA,cH,cV,cD] = dwt2(X,LoD,HiD,'mode','symh'); subplot(2,2,1) imagesc(cA) colormap gray title('Approximation') subplot(2,2,2) imagesc(cH) colormap gray title('Horizontal') subplot(2,2,3) imagesc(cV) colormap gray title('Vertical') subplot(2,2,4) imagesc(cD) colormap gray title('Diagonal')