Laugh detection with Matlab

Instructions

demo.m takes an image using your webcam and tells you if your smiling.
mouthDetector.m searches for a mouth. Shows some approches for feature extraction and segmentation (local threshold).
mouthExport.m Finds mouth and exports its image as black & white. Can be later classified using smileIdentifier.m.
smileIdentifier.m Classify mouth / smile using Principal Component Analysis.
FaceFinder.m Example for finding faces using skin tone segmentation.