How to divide a grayscale image in two blocks

Hi,

Please I want to divide a grayscale image into two halves? Then, after dividing it make each half independent, say

A = top half and

B = the bottom half.

So that I can extract features from each half.

I read some similar questions, and get a code as:

n=fix(size(B,1)/2) //B is the grayscale image
C=B(1:n,:,:);
D=B(n+1:end,:,:)
figure,imshow(C)
figure,imshow(D)

It's almost working, but the results are 2 blank images(C and D).

Really need your help asap, thank you all!

[Ahmet Cecen]

There is no reason why the above shouldn't work. I can't suggest anything further without seeing the image. Attach the original image as a .mat file.

Answer 1

[Image Analyst]

Maybe somehow they got to be floating point. Use

imshow(C, []);
imshow(D, []);

and see if they show up. In general, see the FAQ: http://matlab.wikia.com/wiki/FAQ#How_do_I_split_an_image_into_non-overlapping_blocks.3F