Background Nowadays, medical imaging equipments produce digital form of medical
images. In a modern health care environment, new systems such as PACS (picture archiving …

Securing data in telemedicine applications is extremely essential and therefore it is
mandatory to develop algorithms which preserve the data transmitted. Steganography …

We propose a new nonblind multiresolution watermarking method for still images based on
the contourlet transform (CT). In our approach, the watermark is a grayscale image which is …

In this paper, we present an image watermarking scheme based on contourlet transform
(CT) and singular value decomposition (SVD). Unlike usual CT algorithm where the …

Protecting the copyrights of multimedia content is necessary to discourage unauthorized
distribution or sharing of the content over Internet. Digital watermarking helps in protecting …

In this paper, a novel watermarking technique in contourlet transform (CT) domain is
presented. The proposed algorithm takes advantage of a multiscale framework and multi …

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至系数中的[1 算法1 À, cÁ 了[1Â 通子Ã 的部分d 大系数构GÄÅ, 对nÄÅJK¼ 异值分解, Æ D …

With the massive expansion of image security for day to day purposes, image watermarking
has become a critical factor regarding protection schemes. Here, we proposed a …

The data hiding is one of the most important subject in field of computer science, so a lot of
technique was developed and modified to satisfy the optimum lend of hiding. In this research …

Digital watermarking is a method of copyright protection of audio, images, video and text. We
propose a new robust watermarking technique based on contourlet transform and singular …