MATLAB: Calculate correlation between the blocks

correlation between the blocks

i've divided the image into 16×16 blocks i.e total of 256 blocks.

now i want to calculate the correlation between the blocks…

can anybody help me…

Best Answer

 Blocks=mat2tiles(grayImage,[16,16]);
 data=cellfun(@(x)x(:)-mean(x(:)), Blocks, 'uni',0  );
data=[data{:}];
 Correlations = data.'*data;

Here, Correlations(i,j) is the correlation (my definition) of the i-th and j-th block. I'm not sure if this suits your definition (see my comments above).

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MATLAB: I’ve divided the image into non-overlapping blocks i.e 16 x 16. i’want to convert these blocks to array using mat2cell… can u tell me hoe to do so

mat2cell(grayImage, [repmat(wholeBlockRows, 1, 15), rows-15*wholeBlockRows], [repmat(wholeBlockCols, 1, 15), cols-15*wholeBlockCols], numberOfColorBands)

MATLAB: Calculation of GLCM Mean

hi Jassy ,

there is an answer ( to check ...) in previous question, i repost it here anyway for further discussion/correction with other Contributers :

 I=imread('liftingbody.png'); 
 G=graycomatrix(I);
 [m n]=size(G); 
 GLCMl=0  % left hand side  mean
 GLCMr=0; % right  hand side mean
 for x=1:m
    for y=1:n
        GLCMl=GLCMl+x*G(x,y);
        GLCMr=GLCMr+y*G(x,y);  
  end
end

The difference between the two is 111.

Best Answer

Related Solutions

MATLAB: I’ve divided the image into non-overlapping blocks i.e 16 x 16. i’want to convert these blocks to array using mat2cell… can u tell me hoe to do so

MATLAB: Calculation of GLCM Mean

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