Binary Document Images Authentication by Thinning Digital Patterns

As most documents have been digitized and transmitted over the Internet, it becomes very crucial to protect the integrity of them. Integrity is the process of ensuring that a document is changed by unauthorized users. In this paper, inspired by the Yang and Kot´s method, we proposed a novel scheme to verify the integrity of binary documents by using its digital patterns. We compute the black patterns and white patterns of a document and embed watermark information in it. The experimental result shows that by using our proposed method one can verify the integrity of a digital document, any little change made to it can be detected easily.