Watermarking is closely related to steganography but in watermarking the hidden data is usually related to cover image. In this paper discussed about algorithms for rotation, scaling and translation (RST) invariant image watermarking. There are mainly two categories of RST invariant image watermarking algorithms. Then, we discuss about various algorithm used for RST invariant image watermarking.

Image watermarking is a signal that is embedded in a image data permanently such that it can be extracted by dewater marking using some operations for checking the authenticity of data or user. The watermark is inseparable from the host image and it should be robust enough to resist any modifications along with preserving the image quality. In this way the watermarking helps in keeping intellec...

This paper presents a modified digital image watermarking method based on nonnegative matrix factorization. Firstly, host image is factorized to the product of three nonnegative matrices. Then, the centric matrix is transferred to discrete cosine transform domain. Watermark is embedded in low frequency band of this matrix and next, the reverse of the transform is computed. Finally, watermarked ...

Medical image watermarking is a special branch of image watermarking. The main use of medical image watermarking is for authentication and tamper detection. In addition, it is used to insert the related electronic patient record (EPR) into the medical image. The objective of this paper is to conduct a research of medical image properties and applications. In addition, some of medical image wate...

With the rapid development of information technology, multimedia data are transmitted through digital media. Always the transmission media is not secure. Hence there is a need to protect the information during transmission. To transmit the image information in a secured way, digital image watermarking is one of the best data hiding technique. In image watermarking technique there is a chance to...

Digital watermarking is a method which is used to verify texts, image, video etc. Watermarking Technique is not only used for Authentication, it’s also used for security, image protection, rights of documents. In this perspective experiment we used edge detection technique in watermarking for the purpose of highly authentication of image. Here we used combined approach of LSB-DCT watermarking f...

this paper presents a modified digital image watermarking method based on nonnegative matrix factorization. firstly, host image is factorized to the product of three nonnegative matrices. then, the centric matrix is transferred to discrete cosine transform domain. watermark is embedded in low frequency band of this matrix and next, the reverse of the transform is computed. finally, watermarked ...

--Many watermarking methods for protecting the intellectual property right and authenticating multimedia data have been proposed in recent years. It is possible to guarantee the authenticity of data using readable and fragile watermarking. In this paper, we propose a visible watermarking technique using verifiable digital seal image that is based on the concept of fragile watermarking. Seal ima...

The algorithm of discrete wavelet transform is developed to achieve the integrity authentication of color image contents through embedding watermarking. Firstly, a new watermarking image is generated with the XOR between the original binary watermarking and the image which is processed with Hankel transform. When the watermark is embedded, the original image color is converted first and the bri...

a watermarking scheme for grayscale image isproposed based on a family of the chaotic maps and discretecosine transform. jacobian elliptic mapis employed to encrypt ofwatermarked logo. piecewise nonlinear chaotic map is also usedto determine the location of dct coefficients for the watermarkembedding. the purpose of this algorithm is to improve theshortcoming of watermarking such as small key s...