Film

• All processing is not done with single pictures.
• You often want to look at a moving picture to see how things change.
• As you probably know, you can do this with 30 frames per second.
• It's like flipping through a stack of pictures; they look like they're moving.
• What's usually important is what changes from picture to picture.
• To manage this, you need to match items in the two (or more pictures).
• You then need to see how they are changing.
• This matching process usually starts with line and edge detection, but then correlating lines from one picture with lines from the other.