Encrypting digital holograph with magic transformation
Dongmei Wang · Journal of Zhejiang University of Technology · 2007
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.