中文摘要：

提出了一种彩色图像的单通道加密方法.在该方法中,首先采用三色光栅编码原理将一幅彩色图像编码为一幅灰度图像,再利用双随机相位加密技术对其加密,从而实现了彩色图像的单通道加密.该方法既保证了安全性,同时在加密时仅需要一个相干光源,简化了系统,实用性较强.模拟实验结果证明了其有效性.

英文摘要：

A new method for color image single-channel encryption is proposed. According to tricolor grating theory, a color image is encoded into a gray scale image, and then the gray scale image is encrypted by double-phase encoding. Thus by combining multi-channel with single-channel, only one laser is needed for encryption. With this method, both single-channel encryption and high security are ensured, and the system is simpler and more practical. Computer simulation proves the validity of the proposed method.