Motion Detection Camera

This project implements a motion detection camera using OpenCV and Python. It captures video from a camera, detects motion, and plays an alert sound when significant movement is detected.

Features

• Real-time motion detection
• Visual highlighting of detected motion areas
• Audio alert on motion detection

Requirements

• Python 3.x
• OpenCV (cv2)
• winsound (Windows-specific, for audio alerts)
• For ubuntu, install pygame
• For macOS, install portaudio
• Alternative audio libraries (e.g. pyaudio) can be used if winsound is not available. install pyaudio with pip install pyaudio

Installation

1. Ensure you have Python installed on your system.

2. Install the required libraries:

   pip install opencv-python

Note: winsound is included in standard Python installations on Windows.

Download or clone this repository to your local machine.

Usage

Connect a camera to your computer (the script uses the second camera, index 1). Place an audio file named alert.wav in the same directory as the script for the alert sound. Run the script:

python main.py

To exit the program, press 'q' while the camera window is active.

For Windows Users

To play the alert sound on Windows, you'll need to install the winsound library.

pip install winsound

here is the code to run on windows:

import cv2
import winsound
cam = cv2.VideoCapture(1)
while cam.isOpened():
    ret, frame1 = cam.read()
    ret, frame2 = cam.read()
    diff = cv2.absdiff(frame1, frame2)
    gray = cv2.cvtColor(diff, cv2.COLOR_RGB2GRAY)
    blur = cv2.GaussianBlur(gray, (5, 5), 0)
    _, thresh = cv2.threshold(blur, 20, 255, cv2.THRESH_BINARY)
    dilated = cv2.dilate(thresh, None, iterations=3)
    contours, _ = cv2.findContours(dilated, cv2.RETR_TREE, cv2.CHAIN_APPROX_SIMPLE)
    # cv2.drawContours(frame1, contours, -1, (0, 255, 0), 2)
    for c in contours:
        if cv2.contourArea(c) < 5000:
            continue
        x, y, w, h = cv2.boundingRect(c)
        cv2.rectangle(frame1, (x, y), (x+w, y+h), (0, 255, 0), 2)
        winsound.PlaySound('alert.wav', winsound.SND_ASYNC)
    if cv2.waitKey(10) == ord('q'):
        break
    cv2.imshow('Granny Cam', frame1)
cam.release()
cv2.destroyAllWindows()

How It Works

The script continuously captures frames from the camera and compares consecutive frames to detect changes. When a significant change (motion) is detected:

The motion area is highlighted with a green rectangle. An alert sound is played.

Customization

Adjust the cv2.VideoCapture(1) index if you want to use a different camera. Modify the motion sensitivity by changing the threshold value in cv2.threshold(blur, 20, 255, cv2.THRESH_BINARY). Change the minimum contour area in if cv2.contourArea(c) < 5000: to adjust the sensitivity to small movements.

Note

This script is designed for Ubuntu due to the use of pygame. For other operating systems, you'll need to use a different audio library.

License

MIT

Contact

email: [email protected]