How to compare between two images in matlab using 2D dwt and find result?

I want to find a way to make a comparator between two images (or more) to find out if the 2nd image is the same or not with the 1st image, using 2D dwt , I am already transform the images to the 2D dwt using Haar wavelet transform . but i do not know how to compare between the results which are ( the 4 images LL,LH,HH,HL). please I want a code with matlab to do that. Thanks.

Answer 1

[ahmed am]

hay , i wish i could but iam beginner in matalb . please can you help me by send to me you code to convert image into dwt ,haar, wavelet.

[Ramy Ahmed]

Hi I wish if this the code you need

• clc;
• close all;
• imtool close all;
• clear;
• %load the image you want to convert it
• I = imread('filename.extention');
• whos;
• image(I); colormap; colorbar;
• [cA1,cH1,cV1,cD1] = dwt2(I,'haar');
• A1 = upcoef2('a',cA1,'haar',1);
• H1 = upcoef2('h',cH1,'haar',1);
• V1 = upcoef2('v',cV1,'haar',1);
• D1 = upcoef2('d',cD1,'haar',1);
• colormap;
• subplot(2,2,1); image(wcodemat(A1,192));
• title('Approximation A1')
• subplot(2,2,2); image(wcodemat(H1,192));
• title('Horizontal Detail H1')
• subplot(2,2,3); image(wcodemat(V1,192));
• title('Vertical Detail V1')
• subplot(2,2,4); image(wcodemat(D1,192));
• title('Diagonal Detail D1')

Try it and waiting your request to any help Thanks

[Ramy Ahmed]

please answer me in case of any problems.