Bitte wählen Sie ihr Lieferland und ihre Kundengruppe
During the past few years a variety of techniques have emerged to hid specific information within multimedia data for copyright protection, tamper-proofing and secret communication. The schemes for information hiding that have been proposed so far used either digital signal processing software or hardware; they thus have a problem in some applications like automatic copyright control system which need a fast data-extracting scheme. In this paper, we show that the newly proposed optical correlator-based information hiding system overcomes the problem. In this scheme it is possible to simultaneously extract all the data hidden in one stego image and, furthermore, it is also possible to simultaneously extract all the data hidden in several stego images using optical correlators such as matched spatial filter and joint transform correlator.