Question

I am trying to make a game that uses collision with face.
But i havent figured what cvHaarDetectObjects returns. Here is a smalll snipet of code.

cascade = cv.Load('haarcascade_frontalface_alt.xml')
faces = cv.HaarDetectObjects(grayscale, cascade, storage, 1.2, 2,
cv.CV_HAAR_DO_CANNY_PRUNING)

if faces:
    for i in faces:
        print i

I get somthing like this :((74, 22, 149, 149), 3)
What is all this information? Ty

Answer 1

From the docs:

The function finds rectangular regions in the given image that are
likely to contain objects the cascade has been trained for and returns
those regions as a sequence of rectangles….

The function returns a list of tuples, (rect, neighbors) , where rect
is a CvRect specifying the object’s extents and neighbors is a number
of neighbors.

See also this SO question.