Image Processing problems. Stuck on my own algorithm
I'm now developing an application that compares two images gets the differenc and do some stuff. So I've implemented an algorithm that virtually devides an image into grids each grid is 32x32 size. And compares same grids of two images. This part works well. 

I can get coordinates of changed grids.

But the problem is that when I get the differenc it may happen that there will be also unchanged grids, and I want to make them zero. But I can't reach them... 

Help Me pleeeease.... Maybe this will not seem quiet simple, but I can explain deeper if you need...
Thanks in Advance 
Image Processing problems. Stuck on my own algorithm
===

I'm now developing an application that compares two images gets the differenc and do some stuff. So I've implemented an algorithm that virtually devides an image into grids each grid is 32x32 size. And compares same grids of two images. This part works well. 

I can get coordinates of changed grids.

But the problem is that when I get the differenc it may happen that there will be also unchanged grids, and I want to make them zero. But I can't reach them... 

Help Me pleeeease.... Maybe this will not seem quiet simple, but I can explain deeper if you need...
Thanks in Advance 