Abstract
This study, discusses several kinds of attacks that may meet the watermarked image such as JPEG compression, Gaussian noise and median filter. The study introduces an approach capable of selecting the optimal blocks in cover image to be used in embedding process. Also, in this study, we propose a technique in robust digital watermarking system looking for finding a relation between the contrast of cover image and robustness to increase the resistance of previous attacks.
Highlights
Information hiding is a general term that can be implemented using several techniques
Definition of the optimal cover image block depends on the contrast of block that used to hide watermark has the main reason to choose it as a measurement of selection blocks process
The Proposed technique looking for high contrast and low contrast blocks in origin image to hide two copies of watermark, one of them embedding in most high contrast blocks and the other one embedding in most low contrast blocks
Summary
Information hiding is a general term that can be implemented using several techniques. An adaptive digital image watermarking technique for copyright protection (ADIW): To meet both invisible and robust requirements, we will adaptively modify the intensities of some selected pixels as large as possible and this modification is not noticeable to human eyes. Definition of the optimal cover image block depends on the contrast of block that used to hide watermark has the main reason to choose it as a measurement of selection blocks process.
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