MATLAB: How can i split an image into 25 blocks using for loop

split imagevector concatenation

i have a lot of images i need to split each image into blocks then i have to convert each block into one vector (now i have 25 vectors) i need to concatenate these vectors in one row vector finally i want to obtain an array each row in this array is a large vector(25 concatenated vectors) of one image how can i do this thanks in advance

Best Answer

B = im2col(your_image,[m n],'distinct');
B=B(:)';

m and n are the image block sizes.

B at the end is one row vector with your image blocks in it.

Related Solutions

MATLAB: How to divide image into 16 block

Have you checked im2col()?

Let's say you want to divide your image into blocks of size M,N then something like this should work:

B = im2col(inputImage,[m n],'distinct');

since you want 16 blocks, so pretty much 4x4 blocks then

m=ceil(size(inputImage,1)/4)
n=ceil(size(inputImage,2)/4)

However, I have to ask you a question. Are you sure that it is necessary to divide your image into blocks? I would look into blockproc() and see if I can use that before dividing the image into blocks.

MATLAB: How the concatenate every combination of vectors

allvectors = {a, b, c, d, e, f}; %cell array of all the vectors
allcombs = {};
for c = 1:numel(allvectors)
    combidx = nchoosek(1:numel(allvectors), c);
    ccombs = cell(size(combidx, 1), 1);
    for row = 1:numel(ccombs)
       ccombs{row} = [allvectors{combidx(row, :)}];
    end
    allcombs = [allcombs; ccombs];
end

Best Answer

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MATLAB: How to divide image into 16 block

MATLAB: How the concatenate every combination of vectors

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