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A Partial Encryption Methods for Digital Holograms  

Choi, Hyun-Jun (광운대학교 전자재료공학과)
Seo, Young-Ho (한성대학교 정보통신공학과)
Kim, Dong-Wook (광운대학교 전자재료공학과)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.32, no.1C, 2007 , pp. 51-58 More about this Journal
Abstract
The purpose of this paper is to find an efficient encryption scheme for digital holograms (fringe patterns) with low encryption cost. Therefore, we introduced several encryption attempts in both hologram-domain and frequency-domain (both DCT-domain and DWT-domain) on the bases of the results from analyzing the properties of the coefficients in each domain. To effectively hide the image information, 25%, 1.5625%, and 0.0244% of the original fringe pattern need to be encrypted for hologram-domain scheme, DWT-domain scheme, and DCT-domain scheme, respectively. Consequently the DCT-domain scheme was the most efficient and it is caused by the fact that the ability for DCT to concentrate the energy of a given 2-dimensional image into a small area is the best. The encryption schemes and the analyses in this paper are expected to be used effectively on the researches on encryption and others for digital holograms.
Keywords
Digital Hologram; Fringe Pattern; Encryption; DCT; DWT;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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