Invariant image watermarking using accurate Polar Harmonic Transforms

Hosny, Khalid M.; Darwish, Mohamed M.

doi:10.1016/j.compeleceng.2017.05.015

Cited by 41 publications

(48 citation statements)

References 19 publications

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“…The scaling resistance shown by PCT is better in [20] than that shown in [17]. In [17], zeroth order approximation was used for the moment computation while in [20] polar interpolation method was used for the moment computations. Therefore, an approach for computing the moments plays an important role.…”

Section: Resultsmentioning

confidence: 99%

“…Proposed PHFT [21] PCT [20] PST [20] PCET [17] PCT [17] PST [ extraction in the proposed method is reversible and the watermarked extraction in the PCT is not reversible, we can safely state that the proposed method is better at extracting watermark and it is more robust than the PCT in many kind of known attacks (Table 16). Other than the proposed method, only PHFT in [21] provides completely reversible extraction of the watermark.…”

Section: Attacksmentioning

confidence: 93%

“…Table 5 shows the BER of the extracted watermark when teeth X-ray watermarked image is scaled with a factor 0.5 (second column), 0.75 (third column), 1.5 (fourth column) and 2 (fifth column). Similar to chest X-ray, the proposed method along with PCT of [20] and PHFT of [21] are completely scaling invariant. The ZM and PZM do not show the scaling invariant property.…”

Section: Scaling Invariancementioning

confidence: 99%

“…Figure 8 Table 10 shows the comparison with other algorithms when watermarked image is attacked with JPEG compression. When the quality factor is kept at 90, 75 or 50, the BER of PCT in [20] is also zero. However, with the quality factor 25, the proposed algorithm has smaller BER than the PCT in [20].…”

Section: Jpeg Compressionmentioning

confidence: 99%

“…Orthogonal Fourier-Mellin moments can also used in image watermarking [19]. The authors in [20] used PHT moments for geometric invariant watermarking. The robustness of the watermark depends on the accuracy of the computed image moments.…”

mentioning

confidence: 99%

See 4 more Smart Citations

Application of a novel image moment computation in X‐ray and MRI image watermarking

Singh

Kumar

Ali

et al. 2020

IET Image Processing

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Orthogonal polar image moments which are defined over a unit disk, are used often in watermarking applications. One such image moment is polar harmonic Fourier transformation (PHFT). The quality of the extracted watermark depends on the accuracy of the computed image moments. Various methods have already been used for the computation of the moments with varying degrees of accuracy. This study proposes application of a novel image moments computation method which is a synergy of analytic, and numerical techniques, to image watermarking. The computed moment results in a robust watermark extraction. The PHFT have rotation, and scaling invariance property, which allows the watermark to resist various geometric attacks. In addition to the geometric attacks the watermark has the capability to resist various signal processing attacks. The performance of the proposed watermarking scheme is performed with the methods used in recently published articles. The experimental results show that the proposed method has the better performance compared to other techniques, and has better capability to resist various attacks.

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