Comparing bitmap images for differences?

[lanwrangler at gmail.com]

On May 1, 3:42 pm, "Diez B. Roggisch" <d... at nospam.web.de> wrote:
> With that, you can approach your problem. What is usually done is that a
> sequence of background images is sampled & an average is built. Then the
> actual image is subtracted from that image, with an epsilon to account
> for noise.

Thanks for the tip for an algorithm - I can see how that could work
really nicely (and it gives me some ideas for other things, too!)
Thanks also for the link to the OpenCV bindings.  I'll give 'em a try
and see what happens.

Regards,
  Matthew.