摘要
设计并实现了一种基于分层的半脆弱数字水印算法，用于图像内容完整性认证，篡改定位和恢复。实验结果表明，该算法可以有效地检测篡改区域，对篡改位置精确定位并进行内容恢复，篡改面积小于或等于50％，能够完全恢复被篡改内容。
A hierarchical semi-fragile digital watermarking algorithm was designed for image content integrality authentication, tamper lo- calization and recovery. The experiment results show that the proposed semi-fragile watermarking algorithm had good capability of tamper detection, localization and recovery.It can recovery the tampered image completely when the tamper area is no more than 50%.
作者
陈力
戴勤
CHEN Li, DAI Qin （Electronic Department of Shantou University, Shantou 515063, China）
出处
《电脑知识与技术》
2009年第6期4246-4247,共2页
Computer Knowledge and Technology
关键词
半脆弱水印
篡改定位
篡改恢复
环面自同构映射
矢量量化
semi-fragile watermark
tamper localization
tamper recovery
toral automorphisms
vector quantization
