摘要
To detect and recover random tampering areas,a combined-decision-based self-embedding watermarking scheme is proposed herein.In this scheme,the image is first partitioned into 2×2 size blocks.Next,the high 5 bits of a block’s average value is embedded into its offset block.The tampering type of block is detected by comparing the watermarks of its pre-offset and post-offset blocks.The theoretical analysis and experiments demonstrate that the proposed scheme not only has a lower ratio of false detection but also better performance with regard to avoiding random tampering.
基金
This work was supported in part by the National Natural Science Foundation of China(No.61401512,61602508,61772549,6141512 and U1636219)
the National Key R&D Program of China(No.2016YFB0801303 and 2016QY01W0105)
the Key Technologies R&D Program of Henan Province(No.162102210032)
the Key Science and Technology Research Project of Henan Province(No.152102210005).
