一种用于版权保护的随机相位量化编码方法

基于传统的随机相位编码技术，提出了一种新的相息图量化编码方法。该方法采用条码编码技术和数制转换原理，将编码得到相息图的高阶量化信息映射为二值矩阵，并进一步打印制作成二值的防伪标签，不但可以实现文本内容的自动录入，同时也提高了传统随机相位编码技术解码图像的信噪比。计算机仿真与光学扫描实验表明，该方法具有认证过程相对简单、解码图像信噪比高、成本低和防伪性能好等优点。

A New Phase Quantization Method of Random-phase Encoding for Copyright Protection

A new phase quantization method of a phase hologram based on conventional random-phase encoding technique is proposed.The value consisted of multi-phase information of the phase hologram is mapped into a binary matrix by decimal-binary conversion.The binary matrix is encoded and printed as the 2-D anti-counterfeit label.As a result,the technique not only realizes the automatic input of text information,but also enhances the peak signal-tonoise ratio(PSNR) of the decoded image.Computer simulations and optical scanning experiments show that the presented technique has advantages of the simple authentication process,high PSNR,inexpensive cost and good security.