opencv face recognition

We can detect faces and train the faces with their information. To train the faces, we press on button Train, then fill information of id, name, gender, telephone number. Name is compulsory and unique, but id, gender, telephone is optional. "Rec" button will appear. Focus on one face at a time and press "Rec" button to record the face. Press "Rec" button several time to record different movement of the faces. Last, press "Stop training" button. To add more different faces to the same person, press "train" button and just input their name as previously input. Then focus on a face and press "Rec" button. Training more faces makes the recognition better.