首页|期刊导航|哈尔滨工业大学学报（英文版）|DCT based multipurpose watermarking technique for image copyright notification and protection
哈尔滨工业大学学报（英文版）2004，Vol.11Issue(3)：237-239,3.
DCT based multipurpose watermarking technique for image copyright notification and protection
DCT based multipurpose watermarking technique for image copyright notification and protection
摘要
Abstract
A multipurpose image watermarking technique based on DCT is proposed to notify and protect the copyright of digital products. In order to achieve this objective, the DCT coefficients of each image block are divided into two parts for embedding the visible and invisible watermarks. The visible watermark is embedded in each DC DCT coefficient and most of the AC DCT coefficients of every block, and the invisible watermark in the rest. Based on the characteristics of Human Visual System (HVS) , the embedding strength of the visible watermark is varied in accordance with the underlying content of the host image. The invisible watermark is embedded in a quaternity of midrange frequencies. Experimental results show that the visible watermark is hard to remove and the invisible watermark is robust to common digital signal processing operations.关键词
copyright notification/visible watermark/HVS/quantization index modulationKey words
copyright notification/visible watermark/HVS/quantization index modulation分类
信息技术与安全科学引用本文复制引用
姜守达,陆哲明,吴昊天..DCT based multipurpose watermarking technique for image copyright notification and protection[J].哈尔滨工业大学学报（英文版）,2004,11(3):237-239,3.基金项目
Sponsored by the National Natural Science Foundation of China( Grant No.60272074). （ Grant No.60272074）
