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Digital Hologram Encryption using Discrete Wavelet Packet Transform  

Seo, Young-Ho (광운대학교 교양학부 IT)
Choi, Hyun-Jun (광운대학교 전자재료공학과)
Kim, Dong-Wook (광운대학교 전자재료공학과)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.33, no.11C, 2008 , pp. 905-916 More about this Journal
Abstract
In this paper, we propose a new method which estimates and encrypts significant component of digital hologram using discrete wavelet packet transform (DWPT). After analyzing the characteristics of digital hologram in spatial and frequency domain, the required information for ciphering digital hologram was extracted. Based on this information an ciphering method was proposed with wavelet transform and packetization of subbands. The proposed algorithm can encrypt digital hologram in various robust from selecting transform-level and energy threshold. From analyzing the encryption effect numerically and visually, the optimized parameter for encryption is presented. Without additional analyzing process, one can encrypt efficiently digital hologram using the proposed parameter. Although only 0.032% among total data is encrypted, the reconstructed object dose not identified. The paketization information of subbands and the cipher key can be used for the entire secret key.
Keywords
Digital hologram; Fringe pattern; Encryption; 3 dimensional image; DWPT;
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