Virtual Try-On using Java & OpenCV

A fun and interactive desktop application that lets you try on virtual glasses in real-time using your webcam! Built using Java, OpenCV, and Swing GUI.

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Features

• Real-time face detection using Haar cascades
• Change between 4 different virtual glasses by pressing keys 1 to 4
• Live webcam feed using OpenCV’s VideoCapture
• Transparent PNG glasses overlay support
• No more blue tint issue — accurate colors maintained

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Technologies Used

• Java (JDK 8 or above)
• OpenCV 4.1.1
• Swing (Java GUI)
• Haar Cascade Classifier for face detection
• Maven (optional, for dependency management)

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Project Structure

VirtualTryOnJava/
│
├── lib/
│   ├── opencv_java4110.dll               # OpenCV DLL file
│   └── opencv-4110.jar                   # OpenCV Java JAR
│
├── src/
│   └── main/
│       ├── java/
│       │   └── tryon/
│       │       └── VirtualTryOn.java     # Main Java class
│       │
│       └── resources/
│           ├── models/
│           │   ├── haarcascade_frontalface_alt.xml   # Face detection model
│           │   └── haarcascade_eye.xml               # Optional eye model
│           │
│           └── glasses/
│               ├── glasses_01.png
│               ├── glasses_02.png
│               ├── glasses_03.png
│               └── glasses_04.png
│
├── pom.xml                               # Maven configuration file
└── README.md                             # Project documentation
 
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##  How to Run the Project

Follow these steps to successfully run the Virtual Glasses Try-On project on your local machine:

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### 1. **Clone the Repository**
```bash
git clone https://github.com/your-username/VirtualTryOnJava.git
cd VirtualTryOnJava

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2. Install Java and OpenCV

• Make sure Java (JDK 17 or above) is installed.
• Download OpenCV for Windows from the official site: https://opencv.org/releases/
• Extract the downloaded ZIP.
• Inside the extracted folder, navigate to:

  opencv/build/java/x64/opencv_java4110.dll
  

• Copy the file opencv_java4110.dll and place it in your project’s and also copy the file 'opencv-4110.jar'

  VirtualTryOnJava/lib/
  

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3. Update DLL Load Path in Code

In src/main/java/tryon/VirtualTryOn.java, update this line:

System.load("C:\\Users\\YourName\\path\\to\\opencv_java4110.dll");

✅ Replace the path above with the absolute path to your actual .dll file.
Example:

System.load("C:\\Users\\Vaishnavi\\Downloads\\VirtualTryOnJava\\lib\\opencv_java4110.dll");

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4. Run the Project

✅ Option A: Using an IDE (like IntelliJ or VS Code)

• Open the project.
• Right-click VirtualTryOn.java and run it.

✅ Option B: Using Command Line (VS Code Terminal or PowerShell)

Run the following commands:

mvn clean install
mvn compile exec:java "-Dexec.mainClass=tryon.VirtualTryOn" "-Dexec.jvmArgs=-Djava.library.path=lib"

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Now your webcam will open and detect your face with virtual glasses overlaid!

Press keys 1–4 to switch between glasses styles in real-time.

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