Spliting an Image into smaller images of NxN

I have an image of 1000x1000 pixels, I want to split the image into NxN size blocks and save them into a cell and export them into .jpe files.

Answer 1

[Naqi]

I tried using blockproc(), but could not save block_struct.data into a matrix. I want to be able to export the images into .jpg files.

[Walter Roberson]

You do not need to save the data in to a matrix: just write out the image directly.

imwrite(block_struct.data, FILENAME, 'jpg')

Now the only question becomes one of how to determine what filename to use.

Answer 2

[Image Analyst]

Just do this:

smallGrayImage = fullSizeGrayImage(row1:row2, col1:col2);

If it's color you can do this:

smallRGBImage = fullSizeRGBImage(row1:row2, col1:col2,:);

You'll need to set up row1, row2, col1, and col2 for each subimage with this method, but it's pretty straightforward.

Answer 3

[Walter Roberson]

mat2cell() or blkproc() or blockproc().

You will have to decide what you want to do when N does not evenly divide 1000, leaving you with partial images.