Phase Digital Hologram Encryption Technique in Discrete Wavelet Transform Domain
Hyun-Jun Choi, Young-Ho Seo, Young‐Geun Choi, Hwa‐Sung Kim, Ji‐Sang Yoo, Dong-Wook Kim · ITC-CSCC :International Technical Conference on Circuits Systems, Computers and Communications · 2007
In this paper, we try to encrypt a digital hologram electronically, not optically, to examine the possibility of electronic encryption of a digital hologram. It includes both the spatial-domain encryption and the frequency-domain encryption. For the frequency domain, DWT (Discrete Wavelet Transform) is considered as the transform method from spatial-domain to frequencydomain. Experimental results with more than 100 test digital holograms indicated that DWT domain scheme is the most efficient.