幻方变换加密数字全息图

幻方变换加密数字图像,在某些迭代次数时会泄露原图像的信息.因此,一种改进的方法是将其与其它加密技术结合在一起,如用幻方变换加密数字全息图像.该方法先用信息光学原理将原图生成傅立叶数字全息图,再经幻方变换得到加密图像.在MATLAB上的实验结果表明,幻方变换全息图方法,生成一些类似数字全息图的图像,生成的图像彻底隐去原图的信息.相比单纯使用幻方变换的加密方法,新方法有双重因素控制,有更高的安全性.

Encrypting digital holograph with magic transformation

Using the magic generating algorithms,some image information will be revealed in a digital image encrypted with magic transformation during the transforming process.Now,a new way is proposed in which the magic transformation and encryption techniques is combined together,such as encrypting the digital holograms with the magic transformation.First,the original image is turned into the Fourier digital hologram with information theories.Then the FDCH is transformed into encrypted digital holograph with magic transformation.Experimental results based on MATLAB show that this approach can hide the information of the original image whole by generating some image patterns like FDCH.Comparing with the encryption method only using magic transformation,the new method has two controlling factors and is more secure.