太原理工大学学报2011，Vol.42Issue(5)：514-516,3.
DCT域大容量鲁棒数字水印
Robust and Large Digital Watermarking in DCT Domain
摘要
Abstract
Common digital watermarking will reduce the robust performance and invisibility when the embedded information volume is improved. A gray level digital watermarking was embedded in the DCT transformation domain by exchange the DCT coefficient in order to improve the information volume without decreasing the robust performance. The embedded watermarking is a high compression edition of watermarking image with DWT transformation and the carrier image middle frequency DCT coefficient is replaced with the low frequency coefficient. The algorithm with modification of middle frequency DCT coefficient can promise the robust performance and large information volume. Results show that the algorithm improved the robust performance when it was attacked with JPEG compression, cutting and adding some noises.关键词
数字水印/离散余弦变换(DCT)/鲁棒性/变换域/大容量Key words
digital watermarking/discrete cosine transformation/robust performance/transformational domain/large information volume分类
信息技术与安全科学引用本文复制引用
耿芸,张贵仓,柴智..DCT域大容量鲁棒数字水印[J].太原理工大学学报,2011,42(5):514-516,3.基金项目
国家教育部重点科学技术项目(20413) （20413）
甘肃省科技攻关计划(2GS035-A052-011) （2GS035-A052-011）
