I’ve mentioned in the extremely useful OpenCV library, and tutorials on usage and install. Getting started with OpenCV can be difficult, but can be key if you’re looking to do any sort of image processing on the iOS platform.
I’ve come across an application that actually already is in the app store and provides a good example for those looking to use the Open Computer Vision library. The app uses the edging algorithm along with some tweeks to make things more efficient and provide real time edge detection on the iPhone.
The application is Edgy and you find the application on iTunes here:
Edgy on iTunes
You can find the source code on the Google Code page here:
The app has been added to the open source iOS apps listing. Looks like this could be of great help if you are looking to get started with OpenCV.