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.
© 2008 Chinese Optics Letters
(090.1760) Holography : Computer holography
(100.2000) Image processing : Digital image processing
(100.3010) Image processing : Image reconstruction techniques
(100.7410) Image processing : Wavelets
Zhibin Li, Fei Xia, Gang Zheng, and Junyong Zhang, "Copyright protection in digital museum based on digital holography and discrete wavelet transform," Chin. Opt. Lett. 6, 251-254 (2008)