As digital technologies advance, it is very easy to forge a paper-based certificate or images
to deceive people, and the counterfeits look almost the same as the originals. Because such …

Print-scan resilient data hiding finds important applications in image copyright protection.
This paper proposes a novel algorithm which combines the methods of image complexity …

Recently, the protection of the ownership information of digital images have received much
attentions because illegal copying of digital multimedia has become much easier due to the …

This paper proposes a print-and-scan (PS) resilient watermarking scheme based on the
mean of DCT coefficients (MDC) for a fixed AC frequency of image. We investigate the …

Digital watermarking techniques have been used to assert the ownerships of digital images.
That is, the ownership information is embedded to an image as a watermark such that the …

With the emergence of high resolution scanning and printing devices, copyright protection
for printed materials becomes an important problem in digital image research. After …

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 …

Print-scan resilient watermarking has emerged as an attractive way for document security.
This paper proposes a stroke direction modulation technique for watermarking in Chinese …

In this paper, a secure card authentication system based on digital watermarking is
presented. A sequence of identification characters, eg owner's ID number is inserted into the …

This research is concerned with the watermarking technique which embeds image data
invisibly into a colored image based on the wavelet transform (FT) and discrete cosine …