Hand Gesture-Based Screen Brightness Control

This project demonstrates how to control screen brightness based on hand gestures using Python. It utilizes OpenCV for image processing, Mediapipe for hand detection, and a PowerShell script to adjust screen brightness on Windows.

Features

• Detects hand gestures using the webcam.
• Adjusts screen brightness based on the openness of the hand.
• Reduces brightness when the hand is closed and increases it when the hand is open.

Prerequisites

• Python: Ensure Python is installed on your system.
• PowerShell: For running the PowerShell script that adjusts screen brightness.

Installation

1. Install Python Libraries

You need to install the following Python libraries:

pip install opencv-python mediapipe

2. Create and Configure PowerShell Script

You need to create a PowerShell script to control the screen brightness. Follow these steps:

1. Open a Text Editor: Use any text editor like Notepad or Visual Studio Code.

2. Create a New File: Name it set_brightness.ps1.

3. Add the PowerShell Script Code: Copy and paste the following code into the file:

  param (
    [int]$brightness
)

  # Ensure brightness is between 0 and 100
  $brightness = [math]::Max(0, [math]::Min(100, $brightness))
  
  # Adjust the screen brightness
  (Get-WmiObject -Namespace root/wmi -Class WmiMonitorBrightnessMethods).WmiSetBrightness(1, $brightness)

4. Save the File: Save this file in the same directory as your Python script.

3. Adjust PowerShell Execution Policy

If you encounter issues running the PowerShell script, you might need to adjust the execution policy:

1. Open PowerShell as Administrator: Right-click the PowerShell icon and select "Run as Administrator".

2. Set Execution Policy: Run the following command:

Set-ExecutionPolicy RemoteSigned

Confirm the change by typing Y and pressing Enter.

4. Verify Webcam Access

Ensure that your webcam is properly connected and accessible. The script requires webcam access to detect hand gestures.

Running the Script

1. Navigate to the directory containing your Python script and the set_brightness.ps1 file.

2. Run the Python script using:

   python BrightHandControl.py

3. Control Brightness with Hand Gestures:

   • Closed Hand: Screen brightness will decrease.
   • Open Hand: Screen brightness will increase.

4. Exit: Press the 'q' key while the script window is active to stop the program.

Code Explanation

• Hand Detection: Uses Mediapipe to detect hand landmarks and gestures.
• Brightness Adjustment: Calls a PowerShell script to adjust the brightness based on the detected hand gesture.

Contact 📬

If you have any questions or need further assistance, feel free to contact us at my email : faezeh.darbeheshti@gmail.com .