Comparison Of Reversible Image Watermarking Methods Based On Prediction-Errors

Yıl 2019, Cilt: 23 Sayı: 4, 493 - 500, 01.08.2019

Emre Altınkaya Burhan Baraklı

https://doi.org/10.16984/saufenbilder.466656

Öz

This study compares two reversible image
watermarking algorithms applied to a digital image. The first algorithm is a
method based on adaptive watermarking of prediction-errors. With this method,
as in the existing reversible image watermarking methods, pixels are embedded
in two different ways according to the values of prediction-errors instead of
applying the same watermarking algorithm to all pixels in the imageAccordingly,
the image pixels are divided into two blocks as uniform and non-uniform. The
watermarking capacity has been increased by embedding 2-bit to specific pixels
of uniform blocks and 1-bit to specific pixels of non-uniform blocks. The
second algorithm is a method based on interpolation errors. In this method,
interpolation error is utilized. The two methods compared with each other were
compared with the existing methods in the literature by using computer
simulations, and superior and weak aspects of the methods were determined.

Anahtar Kelimeler

reversible watermarking, adaptive reversible image watermarking, pixel selection, prediction-error expansion, interpolation error expansion

Kaynakça

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