基于视觉密码与QR码的光学脆弱水印

Optical fragile watermarking based on visual cryptography and QR code

提出了一种基于视觉密码与QR码的图像认证和篡改检测的光学脆弱水印方法.一方面,将原始水印图像变换为QR码水印图像,以提高水印隐藏容量.另一方面,将视觉密码与光学相位编码相融合来加密水印图像,以增强系统安全性.通过一系列的攻击与篡改测试了所提水印方法的可行性、脆弱性和不可感知性.模拟结果表明,所提水印方法不仅具有较好的不可感知性,而且在任意攻击下都能灵敏地检测出图像发生了篡改,具有很强的脆弱性.

An optical fragile watermarking method is proposed based on visual cryptography and QR code for image authentication and tamper detection. On the one hand, the original image is transformed into a QR watermark image to improve the watermark hiding capacity. On the other hand, the visual cryptography and optical phase coding are fused to encrypt the watermark image to enhance system security. The feasibility, vulnerability and imperceptibility of the proposed scheme are tested through a series of attacks and tampering. The simulation results show that the proposed method can not only have good imperceptibility, but also achieve high detection performance under different attacks and tampering.