【摘要】 首先采用边缘跟踪算法获取矢量图形的轮廓曲线坐标;然后对坐标数据进行独立元分析处理,以获取仿射不变描述子,根据提取的仿射不变描述子生成与之正交的水印,并将水印加性嵌入到不变描述子中;最后通过上述过程的逆过程恢复出嵌有水印的多边形曲线.实验结果证明了文中算法的有效性,尤其对于仿射变换攻击、检测水印时不需要获得仿射变换参数,是一种鲁棒性很强的算法.更多还原

【Abstract】 An ICA-based polygonal curve watermarking algorithm is proposed.The algorithm consists of the following parts: Firstly,the contour points of polygonal curves are extracted by an edge tracking technique,then an affine-invariant descriptor is computed from the extracted contour points by the ICA.Secondly,the watermark,which is orthogonal to the descriptor,is generated and embedded into the descriptor.Finally,the watermarked contour is recovered by applying the inverse process.The proposed algorithm is experimental shown robust enough to common image processing operations,especially to affine operations.更多还原