Is there a way to get a measurement of confidence level when using haar face detection using OpenCV?

Question

I developed an application for face detection using OpenCVs HAAR cascade face detection. The algorithm works fine, however every once in a while It finds patterns on the wal

Answer 1

Not a direct answer to your question, but this may help in reducing false detection.

You can get less false detection by tweaking MinNeibhbours, CV_HAAR_FIND_BIGGEST_OBJECT, and Size values.

int MinNeighbours = 7;

face_cascade.detectMultiScale( frame_gray, faces, 1.1, MinNeighbours, CV_HAAR_FIND_BIGGEST_OBJECT, Size(60, 60) );