MATLAB (DCT+DWT) Digital Image Watermarking Implementation

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Resource Overview

Graduate thesis on digital image watermarking using combined DCT and DWT algorithms in MATLAB, featuring detailed implementation code and performance analysis

Detailed Documentation

This graduate thesis discusses a digital image watermarking scheme based on Discrete Cosine Transform (DCT) and Discrete Wavelet Transform (DWT) algorithms. The paper provides comprehensive explanations of both algorithms' principles and implementation steps, accompanied by detailed MATLAB program code. By combining these two transformation techniques, the approach achieves more robust and stable digital image watermarking capabilities. The implementation typically involves key MATLAB functions such as dct2() for DCT processing and wavedec2() for multi-level wavelet decomposition. The thesis explores parameter selection and optimization strategies to enhance watermark embedding performance and attack resistance. Experimental results are analyzed and discussed, validating the effectiveness and practicality of the proposed scheme through metrics like PSNR (Peak Signal-to-Noise Ratio) and NC (Normalized Correlation) measurements.

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