基于学习的彩色人脸图像超分辨率重构研究

提出了一种基于四元数模型的彩色人脸图像超分辨率重构算法.该算法利用主成分分析的主要思想,同时结合插值算法的理论,前期进行整体约束,后期进行分块处理,对人脸图像进行超分辨率重构.同时使用奇异值分解去除彩色图像中的噪声,针对主成分分析算法不太忠实于原图像的弱点进行改进;使用四元数表示彩色图像,将R,G,B三个分量同时进行处理.分析结果表明,该算法既利用了彩色分量的相关性,又提高了运算效率.     

基于马氏距离和模糊C均值聚类的抠图算法与应用

基于马氏距离和模糊C均值聚类算法提出了一种数字彩色图像抠图算法.该算法首先对彩色图像像素的红绿蓝三种彩色分量进行正则化处理;然后在正则化图像背景中选取适当的掩膜作为样本集,计算各像素与样本集之间的马氏距离;再利用模糊C均值聚类算法对计算出的马氏距离进行分类;最后利用填洞操作提高抠图质量.对八幅彩色数字图像进行对比实验,结果显示本算法可以自动抠图,且结果优于马氏距离算法、Grow-Cut算法和正则化线性回归算法的相应抠图效果.     

基于CIELab颜色空间的矢量彩色图像放大算法

提出了一种基于CIELab颜色空间和矢量滤波器的彩色图像放大算法.该算法利用彩色图像各颜色通道的固有相关性,在CIELab颜色空间中利用矢量滤波器将彩色像素作为矢量集合进行处理,首先将彩色图像从RGB空间转换为CIELab颜色空间,然后在CIELab颜色空间利用矢量滤波器进行空间插值,最后将插值后的图像从CIELab空间转换为RGB颜色空间,得到放大后的彩色图像,保持了彩色图像的空间和频率特性.实验结果表明该算法优于传统算法.     

基于梯度局部一致性的自适应Bayer模式彩色图像恢复算法

基于图像局部梯度具有明显一致性先验,提出了一种基于梯度局部一致性的自适应Bayer模式彩色图像恢复算法。算法在恢复绿色通道时首先从垂直和水平两个方向的进行插值,得到候选插值结果。然后根据彩色通道结构相似的特点,提出利用多通道梯度线性加权估计图像局部梯度,并利用引导滤波实现用时域图像边缘结构对图像局部梯度进行一致化校验,从而提高边缘估计的精度。然后将一致化校验后的梯度特征与候选插值进行自适应融合得到最终绿色通道插值。最后依据图像通道之间的结构相似性先验,利用绿色通道结构细节实现对红色和蓝色通道重构图像的修正,从而恢复完整的去马赛克彩色图像。通过在Kodak和IMAX两个数据库进行的有效性验证,并与其他最新方法进行的性能对比,结果表明恢复图像主观视觉特性和客观评价指标都优于传统方法。此外,由于不涉及迭代和网络训练,具有高效性。     

一种Bayer图像的插值与去噪方法

为了改善彩色图像还原效果,降低硬件设计复杂性,分析了彩色插值对脉冲噪声的影响,以及彩色插值与去噪先后顺序对图像质量造成的影响,提出一种基于5×5窗口的先去噪后插值的彩色图像还原方法。采用阈值检测噪点的中值滤波算法去除Bayer图像的脉冲噪声,后采用基于梯度的插值算法完成彩色插值。仿真结果表明,该方法还原的图像性能指标优于传统方法,可以有效去除脉冲噪声,同时较好的保留图像细节,且算法复杂度不高,实时性好,易于硬件实现。     

基于Hermite插值的彩色图像边缘检测技术

针对现有的边缘提取方法存在的不能同时解决抑噪能力强和保证边缘连续性好的问题,提出了一种基于Hermite插值的彩色图像边缘检测技术算法.该算法与多通道彩色图像边缘检测算法相结合,根据图像自身的彩色、梯度信息,依靠多尺度Hermite曲线插值技术对边缘线段进行连接修复,保证了算法抑噪和检出边缘曲线光滑连接的能力.实验证明,与现有的算法相比,该算法能充分利用图像的颜色和梯度信息,有效地消除噪声,提高边缘检测的连续性.     

一种基于颜色跟踪的彩色边缘检测算法

传统的边缘检测方法大都是基于灰度图像的,用于彩色图像边缘检测时效果往往不能令人满意.本文提出了一种新的彩色边缘检测算法,它充分考虑了彩色图像的边缘特性,使用彩色差进行跟踪,从而弥补了传统边缘检测方法检测时丢失边缘的不足.通过与其它成熟的边缘检测技术进行比较,结果显示:该算法能提取更多的彩色边缘信息,而且检测精度和效果都比较令人满意,具有一定的实用价值和良好的处理效果.     

相位信息和数学形态学的彩色图像边缘检测

针对传统边缘检测算法最初只基于灰度图像,对彩色图像提取的边缘定位不准确、边缘有断点等问题,将在HSV彩色空间中对彩色图像进行了多通道边缘检测.考虑到传统边缘检测算子对图像的噪声和明暗程度比较敏感,采用相位一致和数学形态学相结合的方法对单通道图像进行边缘检测.仿真实验显示,该方法可以有效地提取彩色图像的边缘.     

采用亮通道先验的低照度图像增强算法

针对低照度彩色图像亮度偏低、对比度差等问题,提出基于亮通道先验的低照度图像增强算法.首先,分析Retinex算法所存在的缺陷,提出了亮通道先验.然后,将原RGB彩色图像转换到HSV彩色空间,对亮度分量V使用亮通道先验和引导滤波估计光照分量和反射分量,并且采用自适应对数校正对光照分量进行提升.最后,将增强后的图像转换到RGB彩色空间.实验结果表明:该算法快速有效,能够很好地提升图像整体亮度和对比度,图像细节得到增强,克服了颜色失真和光晕等问题,增强后的彩色图像更为明亮、自然.     

基于Unit-Linking PCNN和HSI空间的彩色图像分割方法

提出了一种基于Unit-Linking PCNN和HSI空间的彩色图像分割新方法.在RGB空间中,由于R,G,B分量之间有很高的相关性,直接利用这些分量不能得到所需的效果.在提出的算法中,彩色图像首先被转化到HSI颜色空间,图像分解成彩色通道(H和S分量)和亮度通道(I分量).对彩色通道采用基于Unit-Link-ing PCNN的分割算法进行分割,对亮度通道采用最大类间方差阈值算法进行分割,然后将分割后的结果用大概率合并的方法进行组合,得到最终分割结果.试验结果表明,这种方法具有很好的彩色图像分割效果.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that