how to improve the accuracy of face recognition

edit

Hi, I want to test the code about face recognition below on the page

http://docs.opencv.org/2.4/modules/co...

Compiling was successful. So I made face image database which consists of my picture and several celebrities on the internet, But the accuracy was very poor. Could you tell me how to improve the accuracy of face recognition? I do not have any idea about it.

Thank you for your reading.