Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/37707
標題: Steganography on point-sampled geometry
作者: Wang, C.M.
王宗銘 
Wang, P.C.
關鍵字: steganography;point-sampled geometry;principal component analysis;watermarking
Project: Computers & Graphics-Uk
期刊/報告no:: Computers & Graphics-Uk, Volume 30, Issue 2, Page(s) 244-254.
摘要: 
We present two new schemes for digital steganography of point-sampled geometry in the spatial domain. To the best of our knowledge, our schemes are the first in the literature for such types of geometry. Both schemes employ a principal component analysis to translate the points' coordinates to the new coordinate system, resulting in a blind approach. In the first scheme, we establish a list of intervals for each axis according to the secret key. We then embed a bit into each interval by changing the points' position. In the second scheme, we locate a list of macro embedding primitives (MEPs), and then embed c bits (2 <= c <= 6) at each MEP, instead of a single bit its in the first approach. We validate our schemes with various models in terms of capacity, complexity, visibility, and Security. Experimental results demonstrate that the proposed schemes are robust against translation, rotation, and scaling operations. In addition, our schemes are fast and can achieve high data capacity with insignificant visual distortion in the stego models. (c) 2006 Elsevier Ltd. All rights reserved.
URI: http://hdl.handle.net/11455/37707
ISSN: 0097-8493
DOI: 10.1016/j.cag.2006.01.030
Appears in Collections:資訊科學與工程學系所

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