Shubham Santosh
Published © GPL3+

Face Tracker Using OpenCV and Arduino

Track your face using OpenCV's facial recognition.

IntermediateShowcase (no instructions)107,749

Things used in this project

Story

Read more

Schematics

Schematic

Connect additional 9V supply to Arduino.

Code

Arduino code

Arduino
//Face Tracker using OpenCV and Arduino
//by Shubham Santosh

#include<Servo.h>

Servo x, y;
int width = 640, height = 480;  // total resolution of the video
int xpos = 90, ypos = 90;  // initial positions of both Servos
void setup() {

  Serial.begin(9600);
  x.attach(9);
  y.attach(10);
  // Serial.print(width);
  //Serial.print("\t");
  //Serial.println(height);
  x.write(xpos);
  y.write(ypos);
}
const int angle = 2;   // degree of increment or decrement

void loop() {
  if (Serial.available() > 0)
  {
    int x_mid, y_mid;
    if (Serial.read() == 'X')
    {
      x_mid = Serial.parseInt();  // read center x-coordinate
      if (Serial.read() == 'Y')
        y_mid = Serial.parseInt(); // read center y-coordinate
    }
    /* adjust the servo within the squared region if the coordinates
        is outside it
    */
    if (x_mid > width / 2 + 30)
      xpos += angle;
    if (x_mid < width / 2 - 30)
      xpos -= angle;
    if (y_mid < height / 2 + 30)
      ypos -= angle;
    if (y_mid > height / 2 - 30)
      ypos += angle;


    // if the servo degree is outside its range
    if (xpos >= 180)
      xpos = 180;
    else if (xpos <= 0)
      xpos = 0;
    if (ypos >= 180)
      ypos = 180;
    else if (ypos <= 0)
      ypos = 0;

    x.write(xpos);
    y.write(ypos);

    // used for testing
    //Serial.print("\t");
    // Serial.print(x_mid);
    // Serial.print("\t");
    // Serial.println(y_mid);
  }
}

Python script

Python
#Face tracker using OpenCV and Arduino
#by Shubham Santosh

import cv2
import serial,time
face_cascade= cv2.CascadeClassifier('haarcascade_frontalface_default.xml')
cap=cv2.VideoCapture(1)
#fourcc= cv2.VideoWriter_fourcc(*'XVID')
ArduinoSerial=serial.Serial('com7',9600,timeout=0.1)
#out= cv2.VideoWriter('face detection4.avi',fourcc,20.0,(640,480))
time.sleep(1)

while cap.isOpened():
    ret, frame= cap.read()
    frame=cv2.flip(frame,1)  #mirror the image
    #print(frame.shape)
    gray = cv2.cvtColor(frame,cv2.COLOR_BGR2GRAY)
    faces= face_cascade.detectMultiScale(gray,1.1,6)  #detect the face
    for x,y,w,h in faces:
        #sending coordinates to Arduino
        string='X{0:d}Y{1:d}'.format((x+w//2),(y+h//2))
        print(string)
        ArduinoSerial.write(string.encode('utf-8'))
        #plot the center of the face
        cv2.circle(frame,(x+w//2,y+h//2),2,(0,255,0),2)
        #plot the roi
        cv2.rectangle(frame,(x,y),(x+w,y+h),(0,0,255),3)
    #plot the squared region in the center of the screen
    cv2.rectangle(frame,(640//2-30,480//2-30),
                 (640//2+30,480//2+30),
                  (255,255,255),3)
    #out.write(frame)
    cv2.imshow('img',frame)
    #cv2.imwrite('output_img.jpg',frame)
    '''for testing purpose
    read= str(ArduinoSerial.readline(ArduinoSerial.inWaiting()))
    time.sleep(0.05)
    print('data from arduino:'+read)
    '''
    # press q to Quit
    if cv2.waitKey(10)&0xFF== ord('q'):
        break
cap.release()
cv2.destroyAllWindows()

Credits

Shubham Santosh

Shubham Santosh

13 projects • 100 followers
I am a 24 yo electronic enthusiast.

Comments