Difference angle quantization index modulation scheme for image watermarking

作者：

Highlights：

• Difference angle quantization index modulation method is proposed for watermarking.

• Quantize the difference of the two angles instead of the angle themselves.

• The method is for against the gain attacks.

• The method is to disperse interference to watermark from one angle to more angles.

摘要

•Difference angle quantization index modulation method is proposed for watermarking.•Quantize the difference of the two angles instead of the angle themselves.•The method is for against the gain attacks.•The method is to disperse interference to watermark from one angle to more angles.

论文关键词：Gain attack,Difference angle,Quantization index modulation,Document-to-watermark ratio,Robust watermarking

论文评审过程：Received 26 June 2014, Revised 25 March 2015, Accepted 26 March 2015, Available online 3 April 2015.

论文官网地址：https://doi.org/10.1016/j.image.2015.03.010