face_smile_train02.py

# -*- coding: utf-8 -*-
"""
Created on Mon Sep 17 18:46:14 2018

@author: Rahul kumar
"""

import numpy as np
import cv2

#this cascadeClassifier for the frontal face 
faceCascade = cv2.CascadeClassifier('C:\\Users\\Rahul kumar\\Music\\haarcascade_frontalface_default.xml')
#this cascade classifier forthe smile face 
smileCascade = cv2.CascadeClassifier('C:\\Users\\Rahul kumar\\Music\\haarcascade_smile.xml')
 
cap = cv2.VideoCapture(0)
cap.set(3,640) # set Width
cap.set(4,480) # set Height

while True:
    ret, img = cap.read()
    # img = cv2.flip(img, -1)
    gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
    faces = faceCascade.detectMultiScale(
        gray,
        scaleFactor=1.3,
        minNeighbors=5,      
        minSize=(30, 30)
    )

    for (x,y,w,h) in faces:
        cv2.rectangle(img,(x,y),(x+w,y+h),(255,0,0),2)
        roi_gray = gray[y:y+h, x:x+w]
        roi_color = img[y:y+h, x:x+w]
        
        smile = smileCascade.detectMultiScale(
            roi_gray,
            scaleFactor= 1.5,
            minNeighbors=15,
            minSize=(25, 25),
            )
        
        for (xx, yy, ww, hh) in smile:
            cv2.rectangle(roi_color, (xx, yy), (xx + ww, yy + hh), (0, 255, 0), 2)
               
        cv2.imshow('video', img)

    k = cv2.waitKey(30) & 0xff
    if k == 27: # press 'ESC' to quit
        break

cap.release()
cv2.destroyAllWindows()