MATLAB: Dividing RGB image into overlaping blocks

overlappingStatistics and Machine Learning Toolbox

I have a RGB image,please can anyone tell how to divide the image into OVERLAPPING BLOCKS OF SIZE 64 64.then i want to perform some operation on each block

Kindly assist

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Change your

@(block_struct)kmeans(block_struct.data,4)

@(block_struct)kmeans(double(block_struct.data),4)

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MATLAB: Anyone suggest me a code for dct2() and blockproc()

Hi, You should have just continued the post that you started here:

http://www.mathworks.com/matlabcentral/answers/49323-how-to-apply-8x8-dct-on-a-image

Did you read the help for dct2() and blockproc()?

fun = @(block_struct) dct2(block_struct.data);
RGB = imread('autumn.tif');
I = rgb2gray(RGB);
Y = blockproc(I,[8 8],fun);

MATLAB: How to divide image to overlapping blocks

blockproc() can be used overlapping by specifying margins.

Your requirements are confusing. You ask for 16*16 and talk about 4 pixels, but if you subdivide 256*256 into 4 pixel blocks even non-overlapping you are going to get more than 16*16. Are you asking to divide the 256*256 into 16*16 with each of those non-overlapping to each other, and then within each 16*16 block you want to work with overlapping 4x4 pixel blocks (all 225 of them) ??

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MATLAB: Anyone suggest me a code for dct2() and blockproc()

MATLAB: How to divide image to overlapping blocks

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