O'Reilly logo

OpenCV By Example by Vinícius Godoy, David Millán Escrivá, Prateek Joshi

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Frame differencing

We know that we cannot keep a static background image that can be used to detect objects. So, one of the ways to fix this would be to use frame differencing. It is one of the simplest techniques that we can use to see what parts of the video are moving. When we consider a live video stream, the difference between successive frames gives a lot of information. The concept is fairly straightforward. We just take the difference between successive frames and display the difference.

If I move my laptop rapidly, we can see something like this:

Frame differencing

Instead of the laptop, let's move the object and see what happens. If I rapidly shake my head, ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required