This paper proposes a new approach for enhancing the robustness of wavelet-based image watermarking algorithms. The method adjusts wavelet used in the process of image watermarking in order to maximize resistance against image processing operations. Effectiveness of the approach is demonstrated using blind multiplicative watermarking algorithm, but it can easily be generalized to all wavelet-ba...

Digital watermarks have been proposed in recent literature as the means for copyright protection of multimedia data. In this paper we address the capability of invisible watermarking schemes to resolve copyright ownerships. We will show that rightful ownerships cannot be resolved by current watermarking schemes alone. In addition, in the absence of standardization of watermarking procedures, an...

Digital Image Watermarking is used recently to secure the image by embedding another digital image. It is typically used to identify ownership of the copyright of the signal. Frequency domain transformation methods used widely in Digital Image Compression and Digital Image Watermarking. They reduce the weakness of classics digital image watermarking such as Least Significant Bit (LSB) methods w...

The digitization of the information has revolutionized the daily lives of the peoples in this world. The many advantages of digital information have also generated new challenges and new opportunities for innovation. This thesis discusses the issues regarding data hiding and its application to multimedia security and communication, addressing both theoretical and practical aspects, and tackling...

Digital watermarking technique is proposed for copyright protection or ownership identification of digital media, such as audio, image, video, or text. A digital signature or digital watermark is embedded in the host media. The digital watermark is hidden such that it is perceptually and statistically undetectable. This watermark can then be extracted from the host media and used to identify th...

Digital images are used in almost every area of the life. The advent of digital images has brought a lot of progress to various scientific areas, but also many new threads have been opened. One of the main problems with digital data and images is unauthorized replication and use. Digital watermarking is one of the techniques for protecting copyrights of digital images by embedding the additiona...

An information theoretic approach is used to hide a visually meaningful and recognizable two level watermark symbol in the spatial domain. Watermark insertion regions are selected using both Shannon’s entropy measure as well as non-Shannonian entropy for image data. Experimental results confirm the robustness of the proposed scheme against several kinds of attacks, such as lossy compression, fi...

The copyright protection of digital content became a critical issue now-a-days. Digital image watermarking is one of the techniques used to protect digital content. A novel image watermarking approach based on quantization and back propagation neural network is proposed in this paper. The cover image is decomposed up to 3-levels using quantization and DWT. The bitmap is selected as a watermark....

The demand of security is getting higher in these days due to easy reproduction of digitally created multimedia data. Digital watermark is the emerging technique to embed secret information into content for copyright protection and authentication. Watermark is embedded within an image that alteration and modification to the watermarked image can be detected in a fragile watermark system. Waterm...