Digital watermarking is used to hide the information inside a signal, which cannot be easily extracted by the third party. Its widely used application is copyright protection of digital information. It is different from the encryption in the sense that it allows the user to access, view and interpret the signal but protect the ownership of the content. One of the current research areas is to pr...

In most watermarking schemes for copyright protection, a seller always knows the embedded watermark identifying a buyer. However, it incurs both repudiation issue and framing issue. To solve these problems, many watermarking protocols have been proposed based on watermarking schemes in the encrypted domain. In this paper, we enhance an existing watermarking scheme and discuss public key cryptos...

We present a low frequency watermarking method adaptive to image content. The image content is analyzed and properties of HVS are exploited to generate a visual mask of the same size as the approximation image. Using this mask we embed the watermark in the approximation image without degrading the image quality. Watermark detection is performed without using the original image. Experimental res...

Generally, digital watermark can be embedded in any copyright image whose size is not larger than it. The watermarking schemes can be classified into two categories: spatial domain approach or transform domain approach. Previous works have shown that the transform domain scheme is typically more robust to noise, common image processing, and compression when compared with the spatial transform s...

This paper has brought forward an improved blind watermarking algorithm based on two-dimensional discrete wavelet transform. Watermarking applied binary image which had direct testing result and special meaning as watermark. Before embedded watermark, the watermarking image is pretreated by using Arnold scrambling to improve its security. According to the human eyes visual characteristic, it se...

Watermarking is a process of embedding one image into another image, used to protect the from copyright infringement; main aim this watermarking provide ownership assertion- only rightful owner can extract watermark prove ownership. Day-to-day attacks on digital content (like images) are increasing, but still same traditional for protection. In static watermarks at source which may lead comprom...

Watermarking has increased dramatically in recent years in the Internet and digital media. Watermarking is one of the powerful tools to protect copyright. Local image features have been widely used in watermarking techniques based on feature points. In various papers, the invariance feature has been used to obtain the robustness against attacks. The purpose of this research was based on local f...

-In the today’s high scale communication of data there is a pressing need is generated for protection of the data information from many of the illegal duplication and modifications. For this purpose image watermarking is getting a very growing focus for a solution to the theft and tampering by involving the applications of advanced digital image processing operations to watermark copyright and ...

This paper presents a copyright identification scheme for color images that takes advantage of the complementary nature of watermarking and fingerprinting. It utilizes an authentication logo and the extracted features of the host image to generate a fingerprint, which is then stored in a database and also embedded in the host image to produce a watermarked image. When a dispute over the copyrig...

This paper presents a comparative study of watermarking schemes. The embedding of watermark is performed after the image normalization. By normalization process the normalized image achieves invariance properties against geometric attacks which include rotation, scaling and translation of an image. Watermarking is done using five methods DCT Zigzag, DCT blocks, DWT, Zernike transform, SVD-DCT. ...