Digital Watermarking Algorithm Mini-Program

This content aims to provide foundational support for individuals new to digital watermarking technology. I will introduce a mini-program implementing digital watermarking algorithms and share insights about the development environment. This program is developed using MATLAB, a powerful mathematical software platform ideal for implementing and testing digital watermarking techniques. The implementation typically involves discrete cosine transform (DCT) or discrete wavelet transform (DWT) based embedding methods, where watermark data is inserted into specific frequency coefficients of host images. Key functions include image preprocessing, coefficient modification with scaling factors, and inverse transformation for watermark embedding. For extraction, the program reverses the process by comparing original and watermarked image coefficients. Through this practical demonstration, you can better understand digital watermarking concepts and applications, enabling effective implementation in real-world projects.