MATLAB: How to apply 8×8 window to image of size 720×1280

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Hi, I have an image of size 720×1280. I need to apply the sliding window and block processing (neighborhood)operations to the image. the 8×8 window should be applied. Can you suggest anything

Best Answer

See my attached demo. In one of them I compute standard deviations of the blocks. Adapt it to change the block sizes to whatever you want.

Related Solutions

MATLAB: How to recombine subimages from cell2mat which is divided into blocks of 8×8?What is mistake in the code? Actually after splitting into window size of 8×8 by using mat2cell() .

Try like this:

GG = cell(8,1) ;
    for k=1:1*8
        o=1:1*8 ;
        G=cell2mat(C(k,o)');
        GG{k} = G ;
        figure        
        imshow(G);% at this point i am getting images which i am not able to recombine.kindly suggest something here
    end
I = [GG{:}]

Now I is your whole image....

MATLAB: Is it possible to resize a region in a grayscale image

The steps for this is to extract the largest Blob, resize it as per requirement, again map it back to the original image to increase the size of it.

img = imread('blobDilate.jpg');
img = rgb2gray(img);
img(img < 50) = 0;
[rows, cols] = size(img);
figure, imshow(img), title('Original Image');
% Get the max Blob
largestBlob = bwareafilt(logical(img), 1);
figure, imshow(largestBlob)
% increase the size  [+50, +50]of the Blob and remove the added rows, cols
resizeImg = imresize(largestBlob, [rows + 50, cols + 50]); % You can change this according your requirement
% remove added rows, cols
removeRows = [1:25, size(resizeImg,1)-24:size(resizeImg,1)];
removeCols = [1:25, size(resizeImg,2)-24:size(resizeImg,2)];
resizeImg(removeRows,:) = [];
resizeImg(:,removeCols) = [];
figure, imshow(resizeImg)
% New Blob Area
props = regionprops(logical(resizeImg),'Area');
resizedBlobArea = [props.Area];
fprintf('%s %d\n', 'newResizedBlobArea: ', resizedBlobArea)
% final Image
finalImg = logical(img + uint8(resizeImg));
figure, imshow(finalImg), title('Largest Blob resized Image')

Best Answer

Related Solutions

MATLAB: How to recombine subimages from cell2mat which is divided into blocks of 8×8?What is mistake in the code? Actually after splitting into window size of 8×8 by using mat2cell() .

MATLAB: Is it possible to resize a region in a grayscale image

Related Question