Research of Digital Image Watermarking Robustness Algorithm Based on DCT

2014 ◽  
Vol 926-930 ◽  
pp. 3171-3174
Author(s):  
Na Na Zhang ◽  
Li Yu ◽  
Xiao Fang Yang
Keyword(s):  
Image Watermarking ◽  
Algorithm Design ◽  
Implementation Process ◽  
Research Direction ◽  
Digital Image Watermarking ◽  
Robust Watermarking ◽  
Specific Design ◽  
Design And Implementation ◽  
Dct Domain ◽  
Carrier Image

Image watermarking is a carrier image watermarking technology. This paper studies the research direction of the digital watermarking image of the DCT-based image robust watermarking algorithm design. We studies robust algorithm of watermarking image on specific design and implementation process based on DCT domain, the process including image watermarking embedding and watermarking extraction and watermarking detection. Experimental results achieved watermarking embedding evaluation requirements: effectiveness, transparency and robustness.

Digital Image Watermarking Program

2013 ◽  
Vol 717 ◽  
pp. 720-725
Author(s):  
Qing Jun Wang ◽  
Xiao Bin Wang
Keyword(s):  
Digital Image ◽  
Visual Masking ◽  
Image Watermarking ◽  
Digital Image Watermarking ◽  
Chaotic Sequences ◽  
Copyright Information ◽  
Dct Domain ◽  
Unique Nature ◽  
Shear Processing ◽  
Salt And Pepper

This paper proposes digital image watermarking algorithm in DCT domain which makes use of the unique nature of chaotic sequences to encrypt binary image watermarking with copyright information via chaotic sequences and then embeds watermarking component of different strengths in DCT domain of different image blocks self-adaptively. Through the added Gaussian noise, salt and pepper noise and JPEG compression and shear processing operations, the results show that the algorithm has a good visual masking and robustness.

scholarly journals A new DWT-SVD based robust watermarking scheme for real property rights

2014 ◽  
Vol 3 (2) ◽  
pp. 69-78
Author(s):  
Sedigeh Razavi babakalak ◽  
Mohammad Ali Balafar ◽  
Ali Farzan
Keyword(s):  
Property Rights ◽  
Image Watermarking ◽  
Singular Values ◽  
Discrete Wavelet ◽  
Digital Image Watermarking ◽  
Robust Watermarking ◽  
Real Property ◽  
Noise Type ◽  
Value Decomposition ◽  
Watermarking Scheme

In this paper, a new robust digital image watermarking algorithm which was based on singular value decomposition (SVD) and discrete wavelet transform (DWT) was proposed and simulated for protecting real property rights. A gray scale logo image, rather than a randomly generated Gaussian noise type watermark, was used as a watermark. Its embedding algorithm hid a watermark LL sub-band blocks in the low–low (LL) and high-high (HH) sub-bands of a target non-overlapping block of the host image by modifying singular values on SVD version of these blocks. A semi-blind watermark extraction was designed to estimate the original coefficients. Experimental results showed that the proposed scheme made significant improvements in terms of both transparency and robustness and was superior to the existing methods which were considered in this paper.

scholarly journals GRAYSCALE IMAGE WATERMARK DETECTION

2012 ◽  
Vol 3 (1) ◽  
pp. 100-105
Author(s):  
Randeep Kaur ◽  
Kamaljit Kaur Dhillon
Keyword(s):  
Image Watermarking ◽  
Research Work ◽  
Digital Data ◽  
Digital Image Watermarking ◽  
Still Images ◽  
Dct Domain ◽  
Textual Data ◽  
Digital Watermarks ◽  
Comparative Results ◽  
Audio Video

A Digital watermarking is a technique that provides a solution to the longstanding problems faced with copyrighting digital data. Digital watermarks are pieces of information added to digital data (audio, video, or still images) that can be detected or extracted later to make an assertion about the data. This information can be textual data about the author, its copyright, etc; or it can be an image itself. Watermarking Based on DCT Coefficient Modulation technique embeds the watermark in the DCT domain to increase the robustness of the watermarking scheme.DCT based watermarking is an example of frequency domain watermarking. The objective of this research work is to implement DCT based watermarking technique on gray scale image. The study focuses on evaluating the robustness of watermarked image after having three different attacks on watermarked image and extraction of watermark from that particular image. To compare the DCT based watermarking with LSB based watermarking and to validate the proposed work & the comparative results of watermarking using DCT and LSB are also presented. This paper recommends DCT based technique for achieving robustness in digital image watermarking.

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