Heteroscedastic watermark detector in the contourlet domain
نویسندگان
چکیده
منابع مشابه
A Robust Image Denoising Technique in the Contourlet Transform Domain
The contourlet transform has the benefit of efficiently capturing the oriented geometrical structures of images. In this paper, by incorporating the ideas of Stein’s Unbiased Risk Estimator (SURE) approach in Nonsubsampled Contourlet Transform (NSCT) domain, a new image denoising technique is devised. We utilize the characteristics of NSCT coefficients in high and low subbands and apply SURE sh...
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tectable by dedicated software or hardware and very A watermark is a perceptually unobtrusiGe signal embedded in a n image, a n audio or video clip, or any other other multimedia asset. I t s purpocie is t o be a label which is holographically attached to the content. Moreover, it can only be removed by malicious and deliberate attacks (without a great loss of content quali ty) i f some secret ...
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ژورنال
عنوان ژورنال: IET Computer Vision
سال: 2019
ISSN: 1751-9640,1751-9640
DOI: 10.1049/iet-cvi.2018.5254