Simulation of Print-Scan Resilient Digital Watermarking Algorithm

This program simulates a digital watermarking algorithm designed to withstand print-scan attacks. Digital watermarking is a technique for embedding information within digital signals, with broad applications in copyright protection, authentication, and data integrity verification. The algorithm operates through data classification in the DCT domain, where watermark information is embedded into images using frequency-domain coefficient adjustments. Key implementation aspects include block-based DCT computation, quantization matrix design, and threshold-based coefficient selection for embedding. The algorithm demonstrates robustness against common attacks like printing, scanning, and compression through strategic frequency band selection and error correction mechanisms. For comprehensive theoretical background, refer to "Digital Watermarking Theory and Technology" edited by Yang Yixian et al., published by Higher Education Press. This classical work details fundamental concepts, classifications, application scenarios, and related algorithms in digital watermarking, including DCT-domain techniques and robustness evaluation methods.