Digital Image Watermarking and Performance Analysis of Histogram Modification Based Methods

Abstract

Digital image watermarking is defined as inserting digital signals in to a cover image such that the degradation of quality would be minimized and most amounts of the hidden data can be retrieved after geometric and signal processing distortions. In order to select an efficient algorithm in digital image watermarking to fulfill the criteria such as robustness, imperceptibility and capacity, it is necessary to be aware of the specifications of the chosen method. Considering the independency of image histogram from the position of the pixels classifies the histogram modification based watermarking as an appropriate method against geometric and signal processing attacks. This paper investigates the recent presented methods in histogram modification based image watermarking from 2010 to 2017 to identify the weak and strength points of them to emphasize which method should be developed to enhance the performance of the watermarking algorithms in terms of the mentioned criteria. Results show that using the techniques like selection of the adjacent bins intelligently, secret keys and constant points of cover images make them to be a good candidate for image watermarking to withstand against geometric and signal processing attack.