Smile-recognition technology is nothing new. Dozens of camera brands support this feature but it isn't yet part of iOS's built-in camera system.
Now for US$0.99, you can purchase HappyShutter. It's built using new iOS Core Image technology to detect both that faces are within-frame, i.e. not cut off, and when subjects are smiling. What makes this app interesting is that the detection is done in software, not hardware.
Dr. Roberto Valenti, ThirdSight CTO, explained that his team built detection tests using OpenCV, an open-source library that supports real time computer vision and ThirdSight's face analysis algorithms. The roa
