基于二进小波变换的图像增强技术

文章给出了图像的二进小波分解与重构,通过理论分析和实验研究了基于二进小波变换的图像子带增强算法,重点是二进小波基的选取以及图像分解层次对图像中目标边缘增强的影响研究。二进小波变换提供平移不变表示,导致完备的高频分量适于图像增强,实验结果表明,二进小波变换增强方法可以减少噪声的放大,在增强图像微小细节和避免放大噪声两方面获得令人满意的结果。     

图像压缩技术

着重说明图像压缩的目的及意义,并介绍一些代表性的图像数据的压缩方法.另外还介绍了静态图像的标准压缩格式JEPG和动态图像的标准压缩格式MPEG,并对图像和视频压缩的热点问题作了初步的探讨.     

基于可变长音素序列拼接单元的维吾尔语语音合成技术研究

文章采用了一种以可变长音素序列为拼接单元的维吾尔语语音合成系统的技术方案,阐述了维吾尔语的语言特点及语音合成中必须考虑的语音协同发音等现象,给出了语音库的设计思路及其句子、短语、词语、音节以及音素等多级语音库结构,以便直接从语音库中找到拼接单元,还考虑了怎样合成语音库中没有拼接单元的情况。该方法能更好地利用自然语流的原始信息,提升了系统合成语音效果的自然度。     

图像压缩技术

着重说明图像压缩的目的及意义,并介绍一些代表性的图像数据的压缩方法.另外还介绍了静态图像的标准压缩格式JEPG和动态图像的标准压缩格式MPEG,并对图像和视频压缩的热点问题作了初步的探讨.     

Design and implementation of prototype system for online handwritten Uyghur character recognition

Based on the analysis of the unique shapes and writing styles of Uyghur characters,we design a framework for prototype character recognition system and carry out a systematic theoretical and experimental research on its modules.In the preprocessing procedure,we use the linear and nonlinear normalization based on dot density method.Both structural and statistical features are extracted due to the fact that there are some very similar characters in Uyghur literature.In clustering analysis,we adopt the dynamic clustering algorithm based on the minimum spanning tree(MST),and use the k-nearest neighbor matching classification as classifier.The testing results of prototype system show that the recognition rates for characters of the four different types(independent,suffix,intermediate,and initial type) are 74.67%,70.42%,63.33%,and 72.02%,respectively;the recognition rates for the case of five candidates for those characters are 94.34%,94.19%,93.15%,and 95.86%,respectively.The ideas and methods used in this paper have some commonality and usefulness for the recognition of other characters that belong to Altaic languages family.     

在使用代理时因浏览器缺陷引起的几种攻击的介绍

在不使用中间人攻击的情况下(伪造证书),HTTPS是比较安全的(sslv3防范了中间人攻击).但是,即使恶意代理无法直接读到HTTPS加密过后的明文,但是攻击者还是可以使用一些攻击的技巧来达到目的.这就是PBP-因浏览器的缺陷引起的代理攻击.本文说明了目前使用的代理机制上存在的威胁并阐述了这些威胁实现攻击的几种方法,并对于一些没有对浏览器及时更新或对没有好好管理所在局域网的代理的用户提出了警告,提醒在校学生在使用代理(所谓的加速器)上网时有可能存在的安全隐患.     

维吾尔语词频统计子系统的体系结构

维语语料库是汉维机器翻译系统的核心基础,同时也是对维语中的词语进行统计的一个完整和完善的基础模型。在此我们要介绍管道与过滤器模式在维语语料库的构造和维语词频统计系统中的应用。第一步介绍管道和过滤器概念,其次说明建立维语语料库过程和选择语料库原则,最后陈述维语词频统计结果和进行分析。     

Acoustic analysis and decision tree-based shifting hierarchical approach for prediction of Uyghur prosodic boundary

Correct prosodic boundary prediction is crucial for the quality of synthesized speech in text-to-speech system. This article mainly presents the prosodic hierarchy of Uyghur language, which belongs to Turkish language family of Altaic language system and further verifies the reliability of proposed Uyghur prosodic boundary annotation rules by acoustic analysis. In the prediction part, a two-layer shifting hierarchical approach based on decision tree is used for predicting prosodic word and prosodic phrase boundary, and the influence of different feature sets on the Uyghur prosodic boundary prediction is also investigated. Experimental results clearly show the acoustical changes and automatic prediction performance of different prosodic boundaries of Uyghur language, thus laying a good foundation for further research.     

维吾尔语陈述句语调的起伏度

该文基于语调格局的研究思路,采用语调起伏度的计算方法,初步对维吾尔语标准语发音人的陈述语句语料进行了定量分析,考察语句调域(总调域)和调群调域(分调域)的音高表现。研究结果表明:划分总调域和分调域、计算起伏度的方法可以对于语句音高进行量化分析,从而实现不同发音人之间的可比性,进一步可以探求维吾尔语陈述句语调起伏度的分布特征。