Image Compositing and Matting

This project performs simple image compositing and artifact-based color correction using C++. It uses PNG input images to isolate and blend foreground and background regions, applying alpha matting logic for compositing.

Example Output

foreground

-->

alpha * foreground

-->

background

-->

(1-alpha) * background

-->

(1-alpha) * background + alpha * foreground

Features

• Load PNG images (foreground, background, artifact)
• Apply artifact-based color correction (RGB offset)
• Generate alpha matte from artifact image with user specified tolerance
• Composite foreground over background using the matte
• Save the final blended image

artifact Example (the wall behind the robot)

example map of tolerance = 30, if unspesified tolerance = 0

Dependencies

• stb_image.h and stb_image_write.h for PNG loading/saving

Project Structure

• PngImage: Struct to hold image data with width, height, channels, and raw pixel data
• Compositing: Main class that handles image loading, matting, color correction, and saving

How to Use

1. Provide PNG images: artifact, foreground, and background.
2. Compile and run the program — it will generate a result image using the compositing process where you can save the image to enjoy it.

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Developed by Mohammed Yasser Mohammed

email : es-mohamed.yasser2027@alexu.edu.eg