A scheme of oblivious ghost-watermarking based on cepstral analysis and correlation techniques

Koda, Hiromu; Ogawa, Tetsuhiro; Sakata, Shojiro

doi:10.1109/pacrim.2003.1235952

Cited by 2 publications

(2 citation statements)

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“…The decoder functions based on 2D cepstrum dependences and the dependences occurring between 2D coefficients of the cosine transform. The beginning of the cepstrum analysis is marked for the 60's [2]; analyzing the field of digital image watermarking we find a small number of examples of using the Cepstrum [23,53,57] (used mainly for processing audio signals [37,49]). …”

Section: Introductionmentioning

confidence: 99%

Parallel blind digital image watermarking in spatial and frequency domains

Lenarczyk

Piotrowski

2013

Telecommun Syst

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The protection of copyrights of digital images authors is one of the most important tasks set before watermarking. What is especially important is to ensure the high robustness of a watermarked images against attacks, preventing the reading of additional information about the author. In addition, the used processing of the original image must be absolutely invisible. The presented algorithm embeds information in a parallel way-independently of the luminance and chrominance matrices in the spatial and frequency domains. The main factor motivating the use of a parallel watermark embedding via the proposed way was the mutual complementing of robustness, offered by processing in spatial and frequency domains. Additional information is recovered in a 2D cepstrum domain and in coefficients of the cosine transform. The article shows a description of a mathematical model, tests of invisibility, effectiveness and the robustness of the method were carried out. The robustness of the algorithm was shown against the following attacks: JPEG and JPEG2000 lossy compression, noise, median filtering, Low-Pass and High-Pass filtering, desynchronization, simple and inverse D/A conversion, majority cropping, photomontage and affine transforms-rotation, scaling, shearing, translation.

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Section: Introductionmentioning

confidence: 99%

Parallel blind digital image watermarking in spatial and frequency domains

Lenarczyk

Piotrowski

2013

Telecommun Syst

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“…[7]. In the literature there are a few examples [8], [9], [10] of using the cepstral analysis to process images (used mainly to process audio signals [11], [12]). …”

Section: Introductionmentioning

confidence: 99%

Novel Hybrid Blind Digital Image Watermarking in Cepstrum and DCT Domain

Lenarczyk

Piotrowski

2010

2010 International Conference on Multimedia Information Networking and Security

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The problem of affine transform attacks refers to many watermarking algorithms. A slight change in the geometry of watermarked image can disable the decoding of embedded information; therefore the advanced watermarking methods should be robust against the above-mentioned procedures. This paper contains a description of the algorithm consisting of two complementary methods of image watermarking. The watermark is encoded in the luminance and chrominance components in the spatial and frequency domains. The decoding process takes place in the two-dimensional Cepstrum and the discrete cosine transform. The algorithm makes the watermarked image robust against the following affine attacks: scaling shearing and translation. Also the following image distortion processes like JPEG lossy compression, adding noise to the watermarked image, median filtering and majority cropping do not cause any loss of hidden information.

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A scheme of oblivious ghost-watermarking based on cepstral analysis and correlation techniques

Cited by 2 publications

References 0 publications

Parallel blind digital image watermarking in spatial and frequency domains

Parallel blind digital image watermarking in spatial and frequency domains

Novel Hybrid Blind Digital Image Watermarking in Cepstrum and DCT Domain

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