Implementation of Fragile Watermarking Algorithms

In this implementation, we design and develop image-based fragile watermark embedding and extraction algorithms leveraging advanced image processing techniques. The embedding algorithm employs a multi-layer strategy, where we utilize discrete wavelet transform (DWT) or discrete cosine transform (DCT) coefficients for embedding watermarks at multiple frequency bands to enhance both robustness and imperceptibility. For the extraction algorithm, we implement efficient correlation-based detection methods and error correction codes to ensure accurate watermark retrieval and reliable tamper detection. Key functions include watermark preprocessing, coefficient modulation, and detection threshold optimization. Through comprehensive testing with various image formats and attack scenarios, this implementation contributes significantly to both research and practical applications in digital image watermarking by providing a robust framework for authentication and integrity verification.