WATERMARKING CITRA DIGITAL MENGGUNAKAN METODE DISCRETE COSINE TRANSFORM
نویسندگان
چکیده
منابع مشابه
Digital Video Watermarking Using Discrete Cosine Transform and Perceptual Analysis
Due to the extensive use of digital media applications, multimedia security and copyright protection has gained tremendous importance. Digital Watermarking is a technology used for the copyright protection of digital applications. In this paper, a comprehensive approach for watermarking digital video is introduced. We propose a hybrid digital video watermarking scheme based on Discrete Cosine T...
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Abstract—In digital watermarking, a watermark is embedded into a cover text in such a way that the resulting watermarked signal is robust to certain distortion caused by either standard data processing in a friendly environment or malicious attacks in an unfriendly environment. This paper presents a digital image watermarking based on two dimensional discrete cosines transform (DCT2), two dimen...
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Digital watermarking has been proposed as a viable solution to the need of copyright protection and authentication of multimedia data in a networked environment, since it makes possible to identify the author, owner, distributor or authorized consumer of a document. In this paper a new watermarking technique to add a code to digital images is presented: the method operates in the frequency doma...
متن کاملWatermarking of Images in Discrete Cosine transform
Data embedding is simplest technique to achieve the secret data sharing information. Now days a color image is a very popular to consider cover image medium used to send the secret data. I have proposed an approach for hiding a secret image in a cover image. In the beginning, the DCT [8] of image is computed that is compress the secret image, and then encrypt cover data by DES. Various authors ...
متن کاملUsing Contourlet Transform and Discrete Cosine Transform and SVD for Digital Watermarking
Abstract In this paper, embedding a watermark in the image is performed in discrete Contourlet transform (CT) domain. It is known that the CT is able to capture the directional edges and contours superior to discrete wavelet transform. We introduce three methods. The first proposed method is based on embedding watermark bits into the singular value of the selected blocks within low-pass sub-ban...
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ژورنال
عنوان ژورنال: Jurnal Matematika "MANTIK"
سال: 2016
ISSN: 2527-3167,2527-3159
DOI: 10.15642/mantik.2016.1.2.1-7