Added face detection code

face_detection/README.md

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+# Detect face with openCV
+Simple script to detect human face.
+
+# Python requirements
+Python 3.0 or newer
+
+##How to use it
+Double click on file it will open a camera window face will be detected in green box ,press q to quit the session.
+
+## Installation
+
+Use pip to install the necessary package(s).
+
+```bash
+pip install -r requirements.txt
+```

face_detection/main.py

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+import cv2
+
+faceCascade = cv2.CascadeClassifier("haarcascade.xml")
+
+video_capture = cv2.VideoCapture(0)
+
+while True:
+ # Capture frame-by-frame
+ ret, frame = video_capture.read()
+
+ gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
+
+ faces = faceCascade.detectMultiScale(
+ gray,
+ scaleFactor=1.1,
+ minNeighbors=5,
+ minSize=(30, 30)
+ )
+
+ # Draw a rectangle around the faces
+ for (x, y, w, h) in faces:
+ cv2.rectangle(frame, (x, y), (x + w, y + h), (0, 255, 0), 2)
+
+ # Display the resulting frame
+ cv2.imshow('Video', frame)
+
+ if cv2.waitKey(1) & 0xFF == ord('q'):
+ break
+
+# When everything is done, release the capture
+video_capture.release()
+cv2.destroyAllWindows()

face_detection/requirements.txt

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+opencv-python