| 1. | Researches on evaluation of digital image quality are meaningful and basic for the image processing engineering
对图象质量评价的研究已成为图象信息工程中重要的基础研究课题之一。 |
| 2. | As the most important information sources , video information became one of the focuses in the research of underwater objects " detection
其中，图象信息作为主要信息来源成为水下探测技术研究的焦点之一。 |
| 3. | The message to be transferred can be image or text file , and can be hided in the space domain or frequency domain of the image
这些要传输的秘密信息可以是文字信息也可以是图象信息，隐藏的位置可以是图象的空间域或频率域内。 |
| 4. | The former requires the availability of a ground truth . the latter performs change detection without any additional information besides the raw images considered
前一种需要利用先验知识,而后一种除了利用原始图象信息外,不需要任何另外信息。 |
| 5. | The database will allow the fbi to check all entrants to the us against the faces , fingerprints , palm prints and irises of known terrorists and wanted criminals
数据库将会允许fbi检查所有的新入境的对他们有威胁的恐怖分子和犯罪嫌疑人的面部，指纹、掌纹和虹膜图象信息。 |
| 6. | We assorted all information with its format . there are text info , image info , animation info and stream format info . we dealt different info with different method
我们对文档中的信息先进行分类，把文档的信息分为四类，分别为文本信息、图象信息、动画信息和流媒体信息。 |
| 7. | Then based on information theory , we discuss the security of informatin hiding system , including the security of plain messages , secure messages and host images
基于信息论描述了图象信息隐藏及其攻击过程，提出三类典型的理论安全性，即明信安全性、密信安全性和宿主图象的安全性。 |
| 8. | At the same time , multimedia information security problems including copyrights piracy emerged as side effects of the popularity of digital representation and distribution over network
因而，如何保护多媒体信息的安全成为国际上研究的热门课题。本论文主要探讨有关数字图象信息安全中的数字水印技术。 |
| 9. | Based on the laplacian distribution model of dct coefficients , we deduce a theoretical relationship between the scaling parameter in some typical watermarking algorithms and the degradation of watermarked images
研究了图象信息隐藏技术中普遍关注的几个典型性能的定量评估方法，得到了相应的隐藏算法参数调节策略和攻击规避准测。 |
| 10. | Information hiding , which has been proposed as a solution to the problem of covert communication on the internet and copyright protection for multimedia data , is a process of embedding messages directly into the media data by making small modifications to them
图象信息隐藏是一种新颖的信息安全技术，在信息战、数字媒体的知识产权保护和票据防伪等方面有许多重要的应用。 |
