Complete DCT-Domain Digital Watermarking Source Code Suite

This documentation presents a complete suite of DCT-domain digital watermarking source code developed as part of my graduation project. The implementation includes core functionalities such as watermark embedding algorithms that transform watermarks into DCT coefficients, detection mechanisms that extract and verify watermarks from processed images, and robustness evaluation through various attack simulations including noise addition, compression, and filtering. The codebase also incorporates calculations for critical parameters like PSNR (Peak Signal-to-Noise Ratio) and NCC (Normalized Cross-Correlation) to quantitatively assess watermark performance. Key functions employ block-based DCT transformation, coefficient selection strategies, and embedding strength optimization to balance invisibility and robustness. I hope this comprehensive resource will provide valuable assistance and guidance for researchers and developers working in digital watermarking technologies.