This paper presents a method aimed at encrypting color images using vector operations and secondary image phase masks (SPMs). In this encryption, the optical coherent superposition principle is used to separate and overlay the original image into two phase plates on the three channels R, G and B, respectively. Then the double random phase encoding in the Fresnel domain is performed using the SPMs to encrypt one of the phase plates. Finally, the Kronecker product of two random matrices is directly perform randomization on the encoded image, achieving multilevel encryption of color images. Computer simulations are presented to demonstrate its performance, and the feasibility and security of the proposed system are analyzed as well.

中文翻译：

---

基于矢量分解操作和二次图像相位掩码的彩色图像加密

本文提出了一种旨在使用矢量运算和辅助图像相位掩码 (SPM) 加密彩色图像的方法。在该加密中，利用光学相干叠加原理将原始图像分离并叠加到三个通道 R、G 和 B 上的两个相位板中。然后使用 SPM 执行菲涅耳域中的双随机相位编码，以加密相位板之一。最后，两个随机矩阵的Kronecker积直接对编码图像进行随机化，实现彩色图像的多级加密。提出了计算机模拟来证明其性能，并分析了所提出系统的可行性和安全性。