Data Embedding in Text for a Copier System

In this paper, we present a scheme for embedding data in copies (color or monochrome) of predominantly text pages that may also contain color images or graphics. Embedding data imperceptibly in documents or images is a key ingredient of watermarking and data hiding schemes. It is comparatively easy to hide a signal in natural images since the human visual system is less sensitive to signals embedded in noisy image regions containing high spatial frequencies. In other instances, e.g., simple graphics or monochrome text documents, additional constraints need to be satisfied to embed signals imperceptibly. Data may be embedded imperceptibly in printed text by altering some measurable property of a font such as position of a character or font size. This scheme however, is not very useful for embedding data in copies of text pages, as that would require accurate text segmentation and possibly optical character recognition, both of which would deteriorate the error rate performance of the d...

• Type: Conference
• Year: 1999
• Where: ICIP
• Authors: Anoop K. Bhattacharjya, Hakan Ancin
• Keywords: Accurate Text Segmentation, Data Hiding Schemes, ICIP 1999, Image Processing, Monochrome Text Documents