Attention:

I have two versions of main.exe, one is for the purpose of finding faces (main_ff.exe), the other is for any other functionalities (main.exe). For example, if you are using the program to find faces in a picture, use (main_ff.exe) for both training and finding; any other functionalities, use (main.exe) for both training and what else.

The difference is that in finding I normalized the face both in training and testing, but in other functionalities not normalized. It's only a difference of two lines of code.