Which algorithm is best
I am working on a project automatic attendance system using face recognition I have seen both the PCA&LDA and TEMPLATE MATCHING but which will be best for face recognition and what are the accuracy of both the algorithm
"I am working on a project automatic attendance system" - please don't try such a thing, it's just creepy surveillance (very personal, biased opinion).
Besides the remark of @berak, take a look at what info we need from you, by reading the FAQ! That being said, theire is the face detection interface in OpenCV and the face recognition interface in OpenCV that will do exactly what you need. If you are interested in a book that describes both face detection, recognition and emotion analysis, then be patient until the end of october and order OpenCV Blueprints!