This paper presents a rotation scale invariant digital color image watermarking technique using Scale Invariant Feature Transform (SIFT) which is invariant to geometric transformation. The image descriptors extracted using SIFT transform of original image and watermarked image are used for estimating the scaling factor and angle of rotation of attacked image. Using estimated factors attacked im...

This paper proposes a high capacity reversible image watermarking scheme based on enhancement of difference expansion method. Reversible watermarking enables the embedding of useful information in a host signal without any loss of host information. We propose an enhancement of Difference Expansion technique whereby we can embed recursively into multiple layer of payload for grey scale and also ...

Proposed watermarking algorithm is best suitable for the protection of multimedia content by using the concept of Digital Watermark. Proposed watermarking algorithm is developed by using a combination of Discrete Cosine Transform (DCT), Singular Value Decomposition (SVD) frequency domains and Canny Edge detection technique. The proposed algorithm is a Non-blind watermarking algorithm. By using ...

Color image water marking is becoming increasingly important and finding application in diverse areas of discipline. Developing robust image water marking algorithm which is immune to noise, cropping and compression is a challenging task. Altering the size of the image or its orientation reduces the recoverability of the watermarked image. In this paper, we proposed a new block DCT-based digita...

In this paper a novel spatial domain LSB based watermarking scheme for color Images is proposed. The proposed scheme is of type blind and invisible watermarking. Our scheme introduces the concept of storing variable number of bits in each pixel based on the actual color value of pixel. Equal or higher the color value of channels with respect to intensity of pixel stores higher number of waterma...

Aliquot watermarking is the unique idea in aliquot media for copyright protection. Various watermarking algorithm has been developed in recent years, but cognitive content of the intent, as they serve, they demarcated from each other. This context presents a new proposal for hiding a logo-based watermark in color still image. This dodge is based on averaging of central frequency coefficients of...

This paper proposed a robust public-key watermarking algorithm based on contourlet transform and its application in coal mining information construction combining the practice. A solution scheme combining the robust watermarking technology and Hash algorithm was proposed to meet the robustness and security requirements of the Electric Equipment Operation Tickets (EEOT). The scheme used the cert...

The paper presents a digital image watermarking algorithm realized by means of two-dimensional Karhunen-Loeve Transform (2DKLT). The information embedding is performed in the two-dimensional spectrum of KLT. Employed two-dimensional approach is superior to standard, one-dimensional KLT, since it represents images respecting their spatial properties, resulting in a lower noise and better adaptat...

In this paper, we propose a novel algorithm for robust image watermarking by inserting a single copy of the watermark. Usually, robustness is achieved by embedding multiple copies of the watermark.The proposed method locates and watermarks ‘significant pixels’ of the image in the wavelet domain. Here, the amount of distortion at every pixel is kept within the threshold of perception by adopting...

Although, the possibility of electronic storage and transmission has been bene cial for extending the intellectual communication, the easiness of copying and transmitting the data in the internet has increased the piracy and illegal use of owned artworks. As a result, digital data watermarking, has been under thorough investigation in recent years. The main aim of data hiding is to add some tra...