motion detection?

As a start, you can subtract an image from a later one. Only moving objects and noise will appear in the difference. The edges are highlighted for the objects that move, in the direction of motion. You can use this to measure the motion.

Cross correlation will let you pick similar obejcts out between two images.

You should learn about fourier transforms to understand some of the details.

Books

Jaehne Digital image processing 1991 Springer
Pratt Digital image processing 1991 Wiley
Gonzalez, Woods Digital image processing 1992 Adison Wesley
and Lim

To experiment you could start with subrtaction, use an offset to stop numbers going negative.

One way of looking at motion is that you are looking at tited objects in the 3D space of images. (stationary objects form pillars in this space, the same in every plane)

Good motion detection is critical to Mpeg4 encoding, so it is a very current field.

as

the logitech quickcam (a very inexpensive webcam) has some algorithms for motion detection.  Check www.logitech.com for more info about webcams and the SDK for quickcam programming (there is a way to link it to delphi. Search also here for webcam programming and Delphi).

Hope this help.
Manuel Lopez (lopem)

OpenCV from Intel is a Open Source project for image algorithms. It is in C, but accessing the DLLs from Delphi should be possible.
Search Intels website for "OpenCV". There is a mailinglist at OpenCV@yahoogroups.com.
Join by sending an empty message to OpenCV-subscribe@yahoogroups.com

listing..

Lee_Nover, welcome to Experts Exchange.

I think it was not appropriate to make your post an answer because of the following:
* As I can see, your code does only detect whether motion was present, but not WHAT has moved. In many application it's important to detect WHAT has moved.
* Only post something as answer if you are "300% certain" that this is the one and only answer to the
question, and no other exuert has answered it already (maybe as comment).

Comments can be accepted as answer by the person which asked the initial question, so that you don't
have to be afraid of posting comments. If your comment is the one which answers the question best, you'll
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well looking at the question (any algorithm for analysing pictures and reporting if any motion detected) ...

in the future i will post comments not answers

I just hope it does what zastava101 wanted

listening

listening...

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