【摘 要】
:
A novel robust watermarking scheme based on image connectivity is proposed. In the scheme, the connected objects are obtained according to selected connectivity
论文部分内容阅读
A novel robust watermarking scheme based on image connectivity is proposed. In the scheme, the connected objects are obtained according to selected connectivity pattern, and the gravity centers are calculated in several bigger objects as the reference points for watermark embedding. Based on these reference points and the center of the whole image, several sectors are formed, and the same version of watermarks is embedded into these sectors and their opposites. Thanks to the very stable gravity center of the connected objects, watermark detection is synchronized successfully. Simulation results show that the watermark can survive under both local and global geometrical distortions.
其他文献
为探讨烯草酮EC对禾本科杂草的防治效果,以洋葱品种红一号为试材,研究了240g·L~(-1)烯草酮EC加入3种专用助剂不同处理对禾本科杂草的防效。结果表明:240g·L~(-1)烯草酮EC18
患者,女,22岁,因腹胀不适3个月就诊.右侧中腹部可触及大小约1.2×1.0cm肿块,质地中等硬,边界欠清晰,活动度小.
笔者结合有关水池引入管宜设置减压孔板的文章,分析了相关参数设计,提出了简化水力计算的方法,其内容可供参考。
The author combined with the article about the introduc
中国制造商联盟(ChinaManufacturers Alliance,简称CMA)宣布,该公司将推出双钱牌REM-15工程机械轮胎(如图1所示)。该款轮胎适用于较大规格的装载机和推土机。
LBT4.2 m×34 m篦冷机第一次改造未能实现高效低维护成本的目标.二次改造中,改变了人口固定篦床结构;对灰斗下部电动弧形阀向下漏风的现象进行了治理;安装PTFE与弹簧组合的三
丹参酮ⅡA磺酸钠是一种红色的澄明液体,主要用于治疗冠心病、心绞痛、心肌梗死等;氯化钾注射液为无色液体,主要用于补钾.笔者在临床应用中配置5%葡萄糖注射液250ml+丹参酮Ⅱ
屋面材料及制品防火性能测试方法在国内尚属空白,本文概述了国际上常用的三种屋面材料及制品防火性能测试方法,比较了三种测试方法的区别。
Roofing materials and products
他是安全的卫士,他是钢轨的医生。他从事钢轨探伤工作20多年,行走超过2万km,检出并处理重伤钢轨超过200处。自1987年从事钢轨探伤工作以来,他所管辖的区段没有过漏检错检,更
请下载后查看,本文暂不支持在线获取查看简介。
Please download to view, this article does not support online access to view profile.