Hi

I wonder if anyone might be able to help. The program I am writing for my
dissertation is to process pictures against the previous one, i.e frames of
a video clip. I have run into a problem when comparing the RGB values for
each pixal against the last one as I am unable to store it all in any kind
of datastructure.

For example, i want to find the Standard deviation of the Red value for a
specific pixal in a 10 sec video clip, i would process each frame, store the
Red value in an array and then repeat until the end of the clip.

e.g

for (int x = 0; x < picWidth; x++) {

   for (int y = 0; y < picHeight; y++) {

       for(int i = 0; i < frames; i++){

       } // end each frame

   } // end y

} // end x

This method works (ie is more memory efficient) if i do one pixal at a time
and cycle the frame on the inner loop like above, however that requires more
calls to the hdd, ie for every pixal of every image. Therefore this takes
forever to calculate, therefore impractical.

By having the frame on the outer part of the loop would solve the speed
issue, ie reducing the calls to the hdd, but i have no way of storing all
the images in memory as it is too big.

Can anyone suggest any method to solve this problem?

Thankyou
Martin