Raspberry Pi and OpenCV

capture.sh

#!/bin/bash
fswebcam -r 800x600 input.jpg 

detect.py

#!/usr/bin/env python2

import numpy as np
import cv2

print(cv2.__version__)

# install opencv-data
face_cascade = cv2.CascadeClassifier('haarcascade_frontalface_default.xml')

img = cv2.imread('input.jpg')
gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)

faces = face_cascade.detectMultiScale(gray, 1.3, 5)
for (x,y,w,h) in faces:
    print('face found:', x, y)
    cv2.rectangle(img,(x,y),(x+w,y+h),(255,0,0),2)

cv2.imwrite('output.jpg', img)

download.sh

#!/bin/bash
cd /home/pi
wget https://raw.githubusercontent.com/opencv/opencv/master/data/haarcascades/haarcascade_frontalface_default.xml