e-ISSN:0976-5166
p-ISSN:2231-3850


INDIAN JOURNAL OF COMPUTER SCIENCE AND ENGINEERING

Call for Papers 2020

Jun 2020 - Volume 11, Issue 3
Deadline: 15 May 2020
Due to COVID-19 deadline extended to 31-May-2020
Notification: 15 Jun 2020
Publication: 30 Jun 2020

Aug 2020 - Volume 11, Issue 4
Deadline: 15 Jul 2020
Notification: 15 Aug 2020
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ABSTRACT

Title : DIGITAL WATERMARKING SCHEMES FOR AUTHORIZATION AGAINST COPYING OR PIRACY OF COLOR IMAGES
Authors : Keshav S Rawat
Keywords : Digital watermark, discrete wavelet transform, discrete cosine transform, robustness.
Issue Date : December 2010
Abstract :
This paper presents digital watermarking methods for authorization against copying or piracy of color images. Watermarking is a very important field for copyrights of various electronic documents and media. With images widely available on the Internet, it may sometimes be desirable to use watermarks. Digital watermarking is the processing of combined information into a digital signal. A watermark is a secondary image, which is overlaid on the host image, and provides a means of protecting the image. This paper presents the survey on digital watermark features, its classifications and applications. Various watermarking techniques have been studied in detail in mainly three domains: spatial, frequency and statistical domain. In spatial domain, Least-Significant Bit (LSB), SSM-Modulation-Based Technique has been developed. For DCT domain, block based approach and for wavelet domain, multi-level wavelet transformation technique and CDMA based approaches has been developed. The Discrete Wavelet Transform (DWT) is currently used in a wide variety of signal processing applications. This paper also presents the various error matrices for analyses the robustness of watermarking method.
Page(s) : 295-300
ISSN : 0976-5166
Source : Vol. 1, No.4