Added Face Detection Algorithm using Haar Cascade

Author: Lashuk1729

Digital Image Processing/face_detection.py

@@ -0,0 +1,35 @@
+import os
+import numpy as np
+import cv2
+import matplotlib.pyplot as plt
+import matplotlib.patches as mpatches
+
+# cascades: https://github.com/opencv/opencv/tree/master/data/haarcascades
+face_cascade = cv2.CascadeClassifier(cv2.data.haarcascades + 'haarcascade_frontalface_default.xml')
+
+def read_file(image_path):
+    if os.path.isfile(image_path):
+        img = cv2.imread(image_path)
+        gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
+        return True, gray
+
+    else:
+        return False, False
+
+while(1):
+	input_path = str(input("Enter the path of the file: "))
+	val, img = read_file(input_path)
+	if val != False:
+		break
+
+rects = face_cascade.detectMultiScale(img, scaleFactor=1.05,
+            minNeighbors=10, minSize=(30, 30),flags=cv2.CASCADE_SCALE_IMAGE)
+
+# loop over the bounding boxes
+for (x, y, w, h) in rects:
+	# draw the face bounding box on the image
+	cv2.rectangle(img, (x, y), (x + w, y + h), (0, 255, 0), 2)
+
+# show the output image
+cv2.imshow("Image", img)
+cv2.waitKey(0)