图像压缩

The algorithm proposed has higher compression ratio than JPEG algorithm and the image compressed has a perceptually high quality.

实验结果表明，该算法具有比JPEG算法更高的压缩效率，同时保证了图像良好的视觉效果。

There is a mass noted over the posterior cervical space in the left posterior neck ,that corresponds to the mass palpated by patient.This mass appears hyperintense on T2 image,and shows moderate contrast enhancement.Radiograph confirmed the presence of a phlebolith at this location,and complementary ultrasound shows hypoechoic mass which is compressible.

有一个大规模指出，在颈椎后路空间在左后颈部，即相当于地下palpated由patient.this大规模出现高信号图像，并显示出温和的反差enhancement.radiograph证实存在一个静脉石在这个位置，和互补性超声显示低回声肿块是可压缩。

The compressed encoding of image data is one of the most important ring - joint of digital photogrammetric surveying field.

前言 图像数据压缩作为数字摄影测量领域的关键环节，一直受到测绘专业人员的高度关注。

Advanced users can select the compression in the photo resizer or the dimensions of the images.

先进的用户可以选择压缩图片resizer或尺寸的图像。

For preparing for the researches of text digital watermarking and advantaging other researchers" development when using the Chinese mathematical expression theory, this paper designs and realizes a development platform of Chinese mathematical expression. It has been proved by experiments that the platform"s function, execution speed and stability can satisfy the requirements of conversion and operation of enormous data.This research found out that the structure information of Chinese have plenty redundant information that can be used by the Chinese mathematical expression for the digital watermarking, the data embedded can possess better robustness. Based on this finding, this paper designs a kind of text digital watermarking method of embedding watermarking by using Chinese structure, and realizes the method by using the Chinese mathematical expression platform.Considering the watermarking embedding algorithms importance to the robustness of the text digital watermarking, this paper makes fully use of the advantage of the Chinese mathematical expression theory to design a kind of layered text method, which has being realized by using the Chinese mathematical expression platform. The layered text method can handle the text as a solid structure, and the embedding data havepreferable robustness.Finally, based on the researches of the text digital watermarking method and the text layered method, this paper integrates the method of making use of the Chinese structure embedding watermarking with the robust algorithm based on text layered, and realizes a brand-new text digital watermarking method. Proved by lots of experiments, this brand-new method has good robustness and better invisibility.

为了为研究工作做准备和方便其他使用汉字数学表达式理论体系的人进行开发，本文基于汉字数学表达式理论设计实现了一个汉字数学表达式平台，实现了Unicode汉字集中的汉字、汉字数学表达式、汉字的Unicode码之间的相互转化、依据汉字数学表达式提取汉字的结构信息、由汉字数学表达式在非中文平台上不依赖字库显示汉字的图像等功能，使用复合文档技术和流压缩技术进行数据的存储，使用对汉字数学表达式进行二叉树拆分来处理汉字数学表达式中包含的信息，使用自定义哈希函数来提高运行速度，实验证明，该平台功能、速度和稳定性完全能满足大量数据的转化和运算要求；通过研究表明汉字的结构信息中存在大量可使用汉字数学表达式理论加以利用的水印加载空间，加载在该空间的数据可以具有较好的鲁棒性，基于此，本文设计了一种利用汉字结构加载水印的文本数字水印方法，并使用汉字数学表达式平台将其实现；由于水印嵌入算法对于文本数字水印的鲁棒性至关重要，本文充分利用汉字数学表达式理论的优点，设计了一种文本分层的方法，并使用汉字数学表达式平台将其实现，使文本成为一个立体的空间，使嵌入在其中的数据具有更好的鲁棒性；最后在基于汉字数学表达式的文本数字水印嵌入方法的研究和基于汉字数学表达式的文本分层方法的研究的基础上，结合利用汉字结构嵌入水印的方法和基于文本分层的抗攻击文本水印嵌入算法实现了一种全新的文本数字水印方法，经实验证明，该方法有良好的鲁棒性和较好的隐蔽性。

And the attributes, classing and applying matter of digital watermarking technology is presented in a nutshell. Some typical algorithms and performance is analyzed. Then three algorithms based on DCT are carried out.

然后在MATLAB环境中实现了三种基于DCT的数字水印算法，并通过各种常见的图像处理、压缩、剪切和加噪等各种攻击实验验证了这三种算法所生成水印的性能。

It not only dissertates the common procedure, patterns and technical points in developing of the software.

对于图像技术的编码格式，格式转换，数据压缩和流媒体技术结合等应用进行的详细论述。

It not only dissertates the common procedure, patterns and technical points indeveloping of the software.

对于图像技术的编码格式，格式转换，数据压缩和流媒体技术结合等应用进行的详细论述。

It has great significance to compress the hyper-spectral imageries because of its huge data volume.

由于高光谱图像的数据量巨大，因此对其进行压缩具有十分重要的意义。

The experimental results show that this algorithm has good performance against common image processing such as filtering, JPEG compression, noising and geometric transform.

仿真结果表明，算法对高斯白噪声干扰、裁剪、JPEG压缩、旋转、滤波等常见图像处理过程具有很好的鲁棒性。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。