A Feature Calibration Method For Watermarking Of Document Images
ICDAR '99 Proceedings of the Fifth International Conference on Document Analysis and Recognition
Data hiding in binary image for authentication and annotation
IEEE Transactions on Multimedia
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In respect to the issues on privacy, security and legal significance of a document, some sorts of security protections should be put on a document to ensure its genuineness and integrity. In this research, signatories' encrypted digital biometric fingerprint in binary format will be embedded into a binary text document by Flipping - one of the methods in spatial domain. During the embedding process, document will be adaptively partitioned into blocks with fixed size of pixels according to the number of bits in the watermark message. Each watermark bit is embedded into each block by Flipping. Based on the odd or even number of pixels in each block on the embedded document, the fingerprint watermark message is extracted after decryption. Experimental results from our prototype system show that the proposed method is successfully tested for embedding and extracting a fingerprint watermark message in a document no matter it is written in hieroglyph or in alphabetic character.