Digital Watermarking Algorithm Based on DCT Transformation

This document provides the complete source code for a digital watermarking algorithm based on Discrete Cosine Transform (DCT). The implementation serves as an educational reference for students and researchers engaged in digital watermarking studies. Through this code, users can gain deep insights into the fundamental principles and practical implementation of DCT-based watermarking techniques. The program includes key algorithmic components such as DCT coefficient modification, watermark embedding in frequency domains, and robustness enhancement mechanisms. Detailed code comments explain critical operations including block processing, quantization matrix utilization, and inverse transformation procedures. Both beginners and experienced practitioners can benefit from analyzing this implementation to enhance their understanding of digital watermarking technology. The code demonstrates practical approaches for handling image data formats, managing transformation parameters, and implementing extraction algorithms with error correction capabilities. We hope this resource proves valuable for your learning and research endeavors in digital watermarking technology.