import cv2
import serial
import time
# Initialize Serial Communication with Arduino
# Update 'COM3' to your Arduino COM port (for Linux, it might be '/dev/ttyACM0')
arduino = serial.Serial('COM3', 9600)
time.sleep(2) # Give some time for Arduino to reset
# Load Haar cascade classifiers
face_cascade = cv2.CascadeClassifier(cv2.data.haarcascades + 'haarcascade_frontalface_default.xml')
eye_cascade = cv2.CascadeClassifier(cv2.data.haarcascades + 'haarcascade_eye.xml')
if face_cascade.empty():
print("Error: Face cascade file not loaded!")
if eye_cascade.empty():
print("Error: Eye cascade file not loaded!")
cap = cv2.VideoCapture(0)
while True:
ret, img = cap.read()
if not ret:
print("Failed to grab frame")
break
gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
faces = face_cascade.detectMultiScale(gray, 1.3, 5)
if len(faces) == 0:
# No face detected
arduino.write(b'0') # Buzzer OFF
else:
# Face detected
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)
if len(eyes) == 0:
# Face detected but Eyes closed
cv2.putText(img, "Eyes Closed", (x, y-10), cv2.FONT_HERSHEY_SIMPLEX, 0.9, (0, 0, 255), 2)
arduino.write(b'1') # Buzzer ON
else:
# Face detected and Eyes open
for (ex, ey, ew, eh) in eyes:
cv2.rectangle(roi_color, (ex, ey), (ex+ew, ey+eh), (0, 127, 255), 2)
arduino.write(b'0') # Buzzer OFF
cv2.imshow('Face & Eye Detection', img)
if cv2.waitKey(30) & 0xFF == 27: # Press 'ESC' to exit
break
cap.release()
arduino.close()
cv2.destroyAllWindows()
# Arduino code
int buzzerPin = 8; // connect buzzer to pin 8
void setup() {
Serial.begin(9600);
pinMode(buzzerPin, OUTPUT);
digitalWrite(buzzerPin, LOW); // Initially buzzer OFF
}
void loop() {
if (Serial.available() > 0) {
char data = Serial.read();
if (data == '1') {
digitalWrite(buzzerPin, HIGH); // Eyes closed -> buzzer ON
}
else if (data == '0') {
digitalWrite(buzzerPin, LOW); // Eyes open or no face -> buzzer OFF
}
}
}
