Wavelet-Based Digital Watermarking Algorithm
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Resource Overview
A wavelet-based digital watermarking algorithm implemented using MATLAB simulation, featuring discrete wavelet transform (DWT) operations and watermark embedding/extraction techniques.
Detailed Documentation
This article introduces a wavelet-based digital watermarking algorithm that proves highly effective in safeguarding digital content security. Digital watermarking technology embeds hidden information within media files to ensure authenticity and integrity. The MATLAB implementation utilizes multi-level discrete wavelet decomposition (using functions like wavedec2) to transform host images into frequency subbands, followed by watermark embedding in selected coefficients through quantization or modulation techniques. Simulation experiments demonstrate how to adjust embedding strength parameters and evaluate performance metrics like PSNR and NC. Through practical exploration of wavelet transform properties and watermark embedding processes, this approach significantly enhances digital content protection capabilities while providing verifiable robustness against common attacks.
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