Sometime back I had to get passport photos and was very pissed that Walgreens and CVS charge about $10 for 2 photos. This seemed inexplicable as the cost of a typical 4x6 print is about 10c at Snapfish (or 19c at Walgreens). Realizing that they were exploiting the fact that most people didn't know how to format passport photos themselves, I decided to create a webapp that does the required formatting automatically. OpenCV's fast face detector (it uses the current best Viola-Jones algorithm http://research.microsoft.com/en-us/um/people/viola/) proved invaluable for this. You can check out the results at: http://freepassportphoto.dyndns.org/

Any suggestions for improvement from you guys would be greatly appreciated.