Analyze digital video

Your question is not clear enough.

"...compare over time differences in images..."

Do you want to find out what's called "Frame-Rate", which is the intervals of switching still images in progress, or what's called "Key-Frames" to indicate the periods of continuous-shot lengths?

Please try do describe more fully what you are interested in.

In basic form, it would be useful to compare one frame to the previous, if a change occurs from a reference frame it would be captured and stored and or an alarm of some sort would capture someones attention. This would allow quick analysis of surviellance to screen out non-events. For example a stationary camera is monitoring a certain view and an intruder enters, a door is opened, a vehicle moves, etc, that event would be captured seperately and stored so you wouldn't have endless video to screen.

Thanks,

Aaron

Got it. Applicable Movement Detection.

Could this be of any help?

How about this or that?

Check this out

motion detection

It's a google search for motion detection +video.

Back when I was working on security systems, I encountered two types of motion detection via video.

The first takes pictures every second or so. Then the software compares the two.

The second watches for shifts in color, brightness, etc. that tells the software that something is moving in the picture.

Some prefer infrared cameras while others use standard cameras.

The newer stuff today may probably be using other technology that wasn't present a couple of decades ago. Stuff like facial recognition software.

Thanks all. The links answered my questions but have created many more, I'll just have to check it out.