Chinese Optics Letters, Volume. 6, Issue 4, 251(2008)
Copyright protection in digital museum based on digital holography and discrete wavelet transform
A new method to protect the copyright of digital museum based on digital holography is proposed. The Fresnel hologram of watermark image is embedded in the object to be protected through discrete wavelet transform (DWT). After the watermark detection, the copyright information appears in the reconstructed hologram. With the higher redundancy feature in the hologram, the proposed technique can actually survive several kinds of image processing. Experimental results prove that the presented method has good robustness in image protection.
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Zhibin Li, Fei Xia, Gang Zheng, Junyong Zhang. Copyright protection in digital museum based on digital holography and discrete wavelet transform[J]. Chinese Optics Letters, 2008, 6(4): 251