Pixel-Based Fragile Image Watermarking Algorithm

This paper presents a novel and simple pixel-level image authentication scheme to detect the tampered pixels, which utilizes the extreme sensitivity of Hash function in order to achieve precise tamper localization. Block numbers and image unique index are used to extract watermarks and locate tampered position. Moreover, the property of blocks correlation makes it can effectively resist VQ attack. From the experimental results, this algorithm can detect any changes to the pixels or any destruction to the image integrity and effectively implements the authentication of image integrity and restoration of tampered image.