LBP recognizer model for face recognition

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I am working on a video processing project and the priliminary step involves face recognition. As i was unable to train fisher/ eigen face recognizer models I tried using LBP face recognizer model and it jst worked...Basically what my face recognition program does is it jst draws a rectangle around the recognized face and I dont want any rectangle around alien faces...but LPB recognizer forces to do so?...because it predicts the nearest label the detected face matches....got any idea guys to limit the recognition to the nearest..