Semi-Fragile Watermark for the Authentication and Recovery of Tampered Images

In order to strengthen the safety of corporate multimedia assets, a semi-fragile watermarking method is developed, which makes use of the integer wavelet transform (IWT) and the discrete cosine transform (DCT) for tamper detection and recovery. In this paper, we produce two distinct kinds of watermarks: an authentication watermark and a recovery watermark. A tamper detection methodology is utilized at the receiving end to check the watermarked image for validity and detect any assaults. If the changes are determined to be malicious, the suggested tamper recovery method is used to restore the altered areas of the received image. Different incidental/content-preserving modifications and malicious assaults were used to evaluate the suggested tamper detection and recovery method’s performance. The suggested embedding method improved the Peak signal-to-noise ratio (PSNR) of the watermarked images as compared to existing semi-fragile watermarking methods. The suggested tamper detection and recovery method also outperformed the state-of-the-art methods by pinpointing the origin of the assaults and reclaiming the compromised components.