An Inexpensive Digital Watermarking Scheme for Printed Document

This paper describes a method of hiding a copyright symbol into an print image which can survive against print-scan process. Copyright protection is a challenging problem specially for printed image document. Digital watermarking is one of the most efficient method to protect an image from unauthorized use. In this paper we propose an inexpensive hardcopy watermarking technique which can survive print-scan transformation as well as small degree of geometric distortion. Experimental result shows the effectiveness of the proposed watermarking scheme. The proposed scheme could be used as an inexpensive method of copyright protection for printed document like passport, id card etc.