摘要
从离散余弦变换出发,提出了一种图象中植入数字水印的方法此。方法与JPEG,MPEG图象数据压缩标准算法相一致,不仅可方便地实现水印的图象植入,而且在JEPG,MPEG压缩之下,可取得高质量图象效果,并在很大程度上解决了由于图象能量损失导致的数字水印丢失问题。
Starting from discrete cosine transformation, this paper presents a new way to embed digital watermark in images. This method accords with JPEG, MPEG image compression standard. It can no only easily embed watermark into images, but al-so produce a better effect of embedded images even after JPEG, MPEG compression.The method solves the problem of digital watermark image loss caused by images energy loss.
出处
《北方工业大学学报》
1999年第3期71-75,共5页
Journal of North China University of Technology
基金
国家973计划资助
国家自然科学基金
关键词
离散余弦变换
数字水印
信息隐蔽
图象处理
discrete cosine transformation
digital watermark
information hiding