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標題Title: A recursive embedding algorithm towards lossless 2D vector map watermarking
作者Authors: 徐苡庭,陳益崙..等
上傳單位Department: 資訊工程系
上傳時間Date: 2013-12-30
上傳者Author: 徐苡庭
審核單位Department: 資訊工程系
審核老師Teacher: 李南逸
檔案類型Categories: 課堂報告In-class Report
關鍵詞Keyword: Keywords: Lossless watermarking 2D vector map Recursive embedding High capacity Integer transform
摘要Abstract: The copyright protection of two-dimensional (2D) vector map has attracted a lot of research focus
due to the increasing security issues raised in recent years. One promising direction seeking the
optimal tradeoff between adding watermarks and maintaining minimal distortion is the so-called lossless
watermarking, i.e., after watermark extraction the 2D vector maps are fully lossless. This paper presents
a novel lossless watermarking scheme for 2D vector maps based on a novel recursive embedding
algorithm. In our algorithm, feature points of individual polylines are first grouped into united, upon
which highly correlated unites are selected as cover data to carry out a recursive modification of its
mean vertex coordinates. Such operation not only ensures lossless compression, but also enables higher
payload capacity and, to a certain degree, the perception invisibility before and after the watermark
extraction. We have conduced experiments on several real-world 2D vector map applications to show
the effectiveness, efficiency of the proposed algorithm.

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2013_12_5730a110.pptx 3688Kb pptx 68 8
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