Title :
Lossless DEM Watermark Signature Based on Directional Wavelet
Author :
Liu, Xuchong ; Wang, Jianxin ; Luo, Yong
Author_Institution :
Sch. of Inf. Sci. & Eng., Central South Univ., Changsha, China
Abstract :
The conceptions of generalized grayscale and generalized histogram are introduced. A new lossless DEM data watermark sign based on directional wavelet and histogram shift has been developed. It can be used at integrity verification and lossless restoration. The watermark is generated by directional wavelet transformation and embedded by generalized histogram shift by comparing the extracted watermark by using key and the one computed from the reconstructed DEM data, the identity of DEM can be confirmed. It is a kind of blind watermark. The arithmetic can restore the lossless DEM data, and it is safe and not easy to be detected.
Keywords :
image reconstruction; watermarking; wavelet transforms; DEM watermark signature; blind watermark; digital terrain model; directional wavelet transformation; generalized grayscale; generalized histogram; histogram shift; integrity verification; lossless restoration; reconstructed DEM data; Authentication; Cryptography; Data mining; Digital elevation models; Digital signatures; Histograms; PSNR; Protection; Shape; Watermarking;
Conference_Titel :
Image and Signal Processing, 2009. CISP '09. 2nd International Congress on
Conference_Location :
Tianjin
Print_ISBN :
978-1-4244-4129-7
Electronic_ISBN :
978-1-4244-4131-0
DOI :
10.1109/CISP.2009.5304716
