A public verifiable copy protection technique for still images

Lee, Wei‐Bin; Chen, Tung-Her

doi:10.1016/s0164-1212(01)00142-x

Cited by 56 publications

(55 citation statements)

References 6 publications

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“…Many lossless watermarking techniques have also been proposed [10][11][12][13][14][15][16] to maintain good image quality. Visual cryptography [13][14][15] is such one kind of lossless watermarking scheme which furnishes the requirement by utilizing the codebook concept to divide an image into several different sharing images and produce the same by stacking when a dispute for ownership arises.Visual cryptography serves as a good technique against tampering of digital media and proving its rightful ownership and gained much attention for researchers in recent years.…”

Section: Related Workmentioning

confidence: 99%

A Visual Cryptography based Watermarking Scheme Incorporating the Concepts of Homogeneity Analysis and Singular Value Decomposition

Singh¹,

Agarwal²

2013

IJCA

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A visual cryptography based watermarking scheme incorporating the concepts of singular value decomposition (SVD) and the homogeneity analysis of the cover image is proposed here. Firstly, feature vectors are created from the singular values of the homogeneous blocks and thereby classified using the k-medoid clustering technique. A master share is then constructed based on the clustering result and thereafter, combined with the secret binary image (watermark) ownership share is build up. This ownership share is registered with the certificate authority in case to resolve any dispute regarding rightful ownership of the image in future. A two-out-of-two visual cryptography scheme is being used in the proposed methodology and robustness validated by applying comprehensive set of attacks. The peak signal to noise ratio (PSNR) and normalized cross correlation (NCC) metric values are used for evaluation of the scheme. Higher values of these metrics establish the appropriateness of the proposed methodology as compared to the other state of art schemes for copyright protection.

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Section: Related Workmentioning

confidence: 99%

A Visual Cryptography based Watermarking Scheme Incorporating the Concepts of Homogeneity Analysis and Singular Value Decomposition

Singh¹,

Agarwal²

2013

IJCA

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“…Step 1: The translation is eliminated by setting the center of the image , at point with and in (2). , and are the moments of , .…”

Section: Image Normalizationmentioning

confidence: 99%

“…Step 2: Apply a shearing transform to , in the x direction with matrix A= 1 β 0 1 and d=0 in (2). The parameter β is set in a way that the resulting image, denoted by , achieves 0 [11], where the superscript is used to denote , .…”

Section: Image Normalizationmentioning

confidence: 99%

“…The watermarking technique is one of the solutions for image copyright protection. Traditional watermarking methods [1,2,3], embed a watermark logo in the spatial or frequency domain of an original image so that the watermark information can be extracted for copyright protection. However, this embedding procedure degrades the original image's quality.…”

Section: Introductionmentioning

confidence: 99%

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A Robust Zero-Watermark Copyright Protection Scheme Based on DWT and Image Normalization

Shakeri

Jamzad

2011

Advances in Image and Video Technology

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Abstract. Recently, protecting the copyright of digital media has become an imperative issue due to the growing illegal reproduction and modification of digital media. A large number of digital watermarking algorithms have been proposed to protect the integrity and copyright of images. Traditional watermarking schemes protect image copyright by embedding a watermark in the spatial or frequency domain of an image. However, these methods degrade the quality of the original image in some extend. In recent years, a new approach called zero-watermarking algorithms is introduced. In these methods, the watermark does not require to be embedded into the protected image but is used to generate a verification map which is registered to a trusted authority for further protection. In this paper a robust copyright proving scheme based on discrete wavelet transform is proposed. It uses a normalization procedure to provide robustness against geometric distortions and a cellular automaton for noise robustness. Experimental results on images with different complexity demonstrate that our proposed scheme is robust against common geometric and non geometric attacks including blurring, JPEG compression, noise addition, sharpening, scaling, rotation, and cropping. In addition, our experimental results obtained on images with different complexities showed that our method could outperform the related methods in most cases.

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“…Therefore, how to conquer this problem is a major challenge in most of the digital watermarking techniques. Different from conventional watermarking schemes, some novel schemes combining the signature with digital watermarking-like techniques were proposed [1,[14][15][16][17]. There are four advantages in these schemes.…”

Section: Introductionmentioning

confidence: 99%

On the pinned field image binarization for signature generation in image ownership verification method

Lee

Chang

2011

EURASIP J. Adv. Signal Process.

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The issue of pinned field image binarization for signature generation in the ownership verification of the protected image is investigated. The pinned field explores the texture information of the protected image and can be employed to enhance the watermark robustness. In the proposed method, four optimization schemes are utilized to determine the threshold values for transforming the pinned field into a binary feature image, which is then utilized to generate an effective signature image. Experimental results show that the utilization of optimization schemes can significantly improve the signature robustness from the previous method (Lee and Chang, Opt. Eng. 49(9), 097005, 2010). While considering both the watermark retrieval rate and the computation speed, the genetic algorithm is strongly recommended. In addition, compared with Chang and Lin's scheme (J. Syst. Softw. 81 (7), [1118][1119][1120][1121][1122][1123][1124][1125][1126][1127][1128][1129] 2008), the proposed scheme also has better performance.

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A public verifiable copy protection technique for still images

Cited by 56 publications

References 6 publications

A Visual Cryptography based Watermarking Scheme Incorporating the Concepts of Homogeneity Analysis and Singular Value Decomposition

A Visual Cryptography based Watermarking Scheme Incorporating the Concepts of Homogeneity Analysis and Singular Value Decomposition

A Robust Zero-Watermark Copyright Protection Scheme Based on DWT and Image Normalization

On the pinned field image binarization for signature generation in image ownership verification method

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