created face_detection.py file

Code for face detection using haar cascade classifier

Author: anukeshi

face_detection.py

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+import cv2  
+face_cascade = cv2.CascadeClassifier('haarcascade_frontalface_default.xml') 
+eye_cascade = cv2.CascadeClassifier('haarcascade_eye.xml')  
+  
+cap = cv2.VideoCapture(0) 
+  
+while True:  
+  
+    ret, img = cap.read()  
+  
+    gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY) 
+  
+    faces = face_cascade.detectMultiScale(gray, 1.3, 5) 
+  
+    for (x,y,w,h) in faces: 
+        cv2.rectangle(img,(x,y),(x+w,y+h),(255,255,0),2)  
+        roi_gray = gray[y:y+h, x:x+w] 
+        roi_color = img[y:y+h, x:x+w] 
+  
+        eyes = eye_cascade.detectMultiScale(roi_gray)  
+  
+        for (ex,ey,ew,eh) in eyes: 
+            cv2.rectangle(roi_color,(ex,ey),(ex+ew,ey+eh),(0,127,255),2) 
+  
+    cv2.imshow('img',img) 
+  
+    k = cv2.waitKey(30) & 0xff
+    if k == 27: 
+        break
+  
+cap.release() 
+cv2.destroyAllWindows()