Opto-Digital Implementation of Multiple Information Hiding & Real-time Extraction System 


Vol. 28,  No. 1, pp. 24-31, Jan.  2003


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  Abstract

In this paper, a new opto-digital multiple information hiding and real-time extracting system is implemented. That is, multiple information is hidden in a cover image by using the stego keys which are generated by combined use of random sequence(RS) and Hadamard matrix(HM) and these hidden information is extracted in real-time by using a new optical correlator-based extraction system In the experiment, 3 kinds of information, English alphabet of "N", "R", "L" having 512x512 pixels, are formulated 8x8 blocks and each of these information is multiplied with the corresponding stego keys having 64 x 64 pixels one by one. And then, by adding these modulated data to a cover image of "Lena" having 512x512 pixels, a stego image is finally generated In this paper, as an extraction system, a new optical nonlinear joint transform correlator(NJTC) is introduced to extract the hidden data fro a stego image in real-time, in which optical correlation between the stego image and each of the stego keys is performed and from these correlation outputs the hidden data can be easily extracted in real-time Especially, it is found that the SNRs of the correlation outputs in the proposed optical NJTC-based extraction system has been improved to 7dB on average by comparision with those of the conventional JTC system under the condition of having a nonlinear parameter less than k=0.4. This good experimental results might suggest a possibility of implementation of an opto-digital multiple information hiding and real-time extracting system

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  Cite this article

[IEEE Style]

J. Kim, J. Choi, E. S. Kim, "Opto-Digital Implementation of Multiple Information Hiding & Real-time Extraction System," The Journal of Korean Institute of Communications and Information Sciences, vol. 28, no. 1, pp. 24-31, 2003. DOI: .

[ACM Style]

Jung-Jin Kim, Jin-Hyug Choi, and Eun Soo Kim. 2003. Opto-Digital Implementation of Multiple Information Hiding & Real-time Extraction System. The Journal of Korean Institute of Communications and Information Sciences, 28, 1, (2003), 24-31. DOI: .

[KICS Style]

Jung-Jin Kim, Jin-Hyug Choi, Eun Soo Kim, "Opto-Digital Implementation of Multiple Information Hiding & Real-time Extraction System," The Journal of Korean Institute of Communications and Information Sciences, vol. 28, no. 1, pp. 24-31, 1. 2003.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880