Anti-print and scan security watermarking algorithm based on halftone image
An anti-print-scanning anti-counterfeiting watermarking algorithm based on threshold-adjusted dot diffusion image and master-slave pixel pair switching is proposed.Firstly,the single error diffusion kernel and quantization threshold in the point diffusion process are changed.Then,the watermark image is encrypted by Arnold scrambling and chaotic encryption.Finally,the watermark information is embedded in the halftone image by switching the master-slave pixel pair.The experimental results show that there is no periodic pattern inside the watermarked image,and the correct decoding rate of the watermark is more than 85％ under the attack of printing scanning,cutting,painting and noise,which shows stronger robustness than other similar algorithms.
万方数据
维普
