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This paper presents a new fragile watermarking method, whereby a secure block-wise and an interlaced watermarking mechanisms are hierarchically structured to provide higher tampering localisation capabilities. The block-wise method provides security against conventional distortions, cropping, as well as sophisticated attacks, whereas the interlaced scheme is aimed at enhancing the localisation accuracy...
This paper presents a new image fragile watermarking method aimed at affording higher tampering localisation accuracy and self-recovery capabilities. First, the distorted regions are roughly localised by means of a secure block-wise mechanism resilient to cropping. An additional pixel-wise mechanism is proposed to refine the tampering localisation map and estimate the value of the distorted pixels...
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