Example, if a user wears a yellow shirt with a specific icon on it will change the layout of the application.
I have researched this a few days now and found some intresting articles.
This seems like an intresting approach: http://research.ijcaonline.org/volume83/number3/pxc3892575.pdf
And ofcourse the SURF algorithm seems to be a legimate approach: http://www.vision.ee.ethz.ch/~surf/eccv06.pdf
So my question is "what algortihms might be best to implement?". And also if possible, which might be easiest to implement? I have quite limited time and this is only one of the objectives for this project.
I appreciate all the help and answers I can get.
edit. Surf is not acceptable because of patents.