IEEE Trans Image Process - Robust reversible watermarking via clustering and enhanced pixel-wise masking.

Tópicos

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Resumo

Robust reversible watermarking (RRW) methods are popular in multimedia for protecting copyright, while preserving intactness of host images and providing robustness against unintentional attacks. However, conventional RRW methods are not readily applicable in practice. That is mainly because 1) they fail to offer satisfactory reversibility on large-scale image datasets; 2) they have limited robustness in extracting watermarks from the watermarked images destroyed by different unintentional attacks; and 3) some of them suffer from extremely poor invisibility for watermarked images. Therefore, it is necessary to have a framework to address these three problems, and further improve its performance. This paper presents a novel pragmatic framework, wavelet-domain statistical quantity histogram shifting and clustering (WSQH-SC). Compared with conventional methods, WSQH-SC ingeniously constructs new watermark embedding and extraction procedures by histogram shifting and clustering, which are important for improving robustness and reducing run-time complexity. Additionally, WSQH-SC includes the property inspired pixel adjustment (PIPA) to effectively handle overflow and underflow of pixels. This results in satisfactory reversibility and invisibility. Furthermore, to increase its practical applicability, WSQH-SC designs an enhanced pixel-wise masking (EPWM) to balance robustness and invisibility. We perform extensive experiments over natural, medical, and synthetic aperture radar (SAR) images to show the effectiveness of WSQH-SC by comparing with the histogram rotation (HR)-based and histogram distribution constrained (HDC) methods.

Resumo Limpo

robust revers watermark rrw method popular multimedia protect copyright preserv intact host imag provid robust unintent attack howev convent rrw method readili applic practic main fail offer satisfactori revers largescal imag dataset limit robust extract watermark watermark imag destroy differ unintent attack suffer extrem poor invis watermark imag therefor necessari framework address three problem improv perform paper present novel pragmat framework waveletdomain statist quantiti histogram shift cluster wsqhsc compar convent method wsqhsc ingeni construct new watermark embed extract procedur histogram shift cluster import improv robust reduc runtim complex addit wsqhsc includ properti inspir pixel adjust pipa effect handl overflow underflow pixel result satisfactori revers invis furthermor increas practic applic wsqhsc design enhanc pixelwis mask epwm balanc robust invis perform extens experi natur medic synthet apertur radar sar imag show effect wsqhsc compar histogram rotat hrbase histogram distribut constrain hdc method

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