#!/usr/bin/python
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#
# image_face_detect.py
# Face detect from image
#
# Author : Shantnu
# Date   : 06/06/2017
# Origin : https://github.com/shantnu/FaceDetect/blob/master/face_detect.py
# Usage  : python image_face_detect.py abba.png haarcascade_frontalface_default.xml

import cv2
import sys

# Get user supplied values
imagePath = sys.argv[1]
cascPath = sys.argv[2]

# Create the haar cascade
faceCascade = cv2.CascadeClassifier(cascPath)

# Read the image
image = cv2.imread(imagePath)
gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)

# Detect faces in the image
faces = faceCascade.detectMultiScale(
    gray,
    scaleFactor=1.1,
    minNeighbors=5,
    minSize=(30, 30),
    flags = cv2.cv.CV_HAAR_SCALE_IMAGE
)

print "Found {0} faces!".format(len(faces))

# Draw a rectangle around the faces
for (x, y, w, h) in faces:
    cv2.rectangle(image, (x, y), (x+w, y+h), (0, 255, 0), 2)

cv2.imshow("preview", image)
cv2.waitKey(0)

cv2.destroyAllWindows()
