A robust DCT-based watermarking for copyright protection

Lin, Shinfeng D.; Chen, Chin-Feng

doi:10.1109/30.883387

Cited by 279 publications

(45 citation statements)

References 11 publications

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“…The watermark is embedded in to the perceptually most significant portion of the signal with spread-spectrum scheme. Lin and Chen also proposed a DCT-based watermarking scheme [8]. Their method embeds the watermark into the low-frequency coefficients.…”

Section: Introductionmentioning

confidence: 99%

DCT based image watermarking method with dynamic gain

Ustubioglu

Ulutaş

2015

2015 38th International Conference on Telecommunications and Signal Processing (TSP)

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Digital watermarking is a basic method for copyright protection. This paper presents a blind watermarking approach in DCT domain with Spread Spectrum technique. The method divides the image into non-overlapping blocks of size 8×8. Each block is transformed into frequency domain using DCT. Middle band frequency coefficients of each block are utilized to embed and extract watermark. Two number sequences of size 1×22 are carefully (first set in increasing order and the other one in decreasing order) predetermined by the algorithm to improve the robustness of the method against some attacks. The strength of the watermark is also determined dynamically according to the energy characteristic of the current block. Experimental results show that the proposed method can extract watermark even when an image was distorted by some attacks such as JPEG compression, cropping and noise addition. The method also has higher Normalized Cross-Correlation (NC) values compared to other works in the literature.

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Section: Introductionmentioning

confidence: 99%

DCT based image watermarking method with dynamic gain

Ustubioglu

Ulutaş

2015

2015 38th International Conference on Telecommunications and Signal Processing (TSP)

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“…[5][6][7] These techniques take the secret data to be protected as the watermark and embed it into the carrier. However, the most important mission the watermarking techniques must accomplish is to prevent any attacker from removing the watermark from the cover image.…”

Section: Introductionmentioning

confidence: 99%

Scheme for hiding images by finding optimal one-to-two substitution table using dynamic programming strategy

Chan¹,

Chang²

2007

The Imaging Science Journal

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, Chang et al. (Pattern Recognition, 2003 (7), 1583-1595) proposed a way to find an optimal one-to-one substitution table using a dynamic programming strategy in image hiding. The present paper introduces a new method which uses the one-to-two substitution table to help with image hiding. First, a square-error matrix with three dimensions was built up. After applying a dynamic programming strategy on the square-error matrix, one can obtain the optimal one-to-two substitution table. According to the experimental results, the new method is capable of offering much better stego-image quality than the LSB substitution method and the one-to-one substitution method.

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“…The calculation of mean value is addressed in (4). 3) Use the secret key KeyA to obtain the estimative watermark with exclusive-or operation as show in (7).…”

Section: The Extracting Phasementioning

confidence: 99%

“…Invisible watermarking, as the name suggests, the watermark is imperceptible in the watermarked image. Invisible watermarking can be classified into three types, robust [4,5,8], fragile [1,3,6] and semi-fragile [7].…”

Section: Introductionmentioning

confidence: 99%

A Multipurpose Wavelet-Based Image Watermarking

Chang

Tai

Lin

First International Conference on Innovative Computing, Information and Control - Volume I (ICICIC'06)

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To address copyright protection and content authentication, researchers have proposed various digital watermarking methods. In this paper, an improved, multipurpose method is proposed where the authentication watermark and the robust watermark are embedded in the wavelet transform domain. Through a series of experiment, supportive evidence is provided to demonstrate the proposed method being effective in image authentication and pre-empting image processing attacks.

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A robust DCT-based watermarking for copyright protection

Cited by 279 publications

References 11 publications

DCT based image watermarking method with dynamic gain

DCT based image watermarking method with dynamic gain

Scheme for hiding images by finding optimal one-to-two substitution table using dynamic programming strategy

A Multipurpose Wavelet-Based Image Watermarking

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