一种基于小波和形态学的边缘检测方法

提出了一种基于多分辨率小波和二值形态学的边缘检测方法，通过对图像进行多尺度的小波分解，抛弃低频信息来重构小波系数．对重构后的图像利用形态学中的八邻域处理来提取边缘信息．实验结果表明该方法边缘定位准确，对边缘细节的检测效果明显．     

小波变换在图像分割中的应用研究

在讨论基于小波变换的阈值分割算法的同时,提出了Canny算子和小波变换的边缘信息融合的图像分割方法,以及利用小波变换对图像纹理进行分解、特征提取,然后利用模糊C-均值聚类(FCM)进行纹理分割的方法;探讨了各种分割方法的特点、应用范围、及图像分割技术的发展方向.     

方向小波在图象边缘提取中的应用

作者提出了一种基于方向小波变换的边缘检测新算法。比较了方向小波变换和传统小波变换在图像边缘检测中的不同之处。分析得出方向小波变换更符合图像的方向，纹理特征，因而更能反映图像的边缘信息。经计算机仿真，效果十分良好。     

双波段红外图像融合的小波分维算法

针对双式红外(中红外和长红外)提出了一种基于小波的分维融合算法.通过小波变换,分别对中波红外和长波红外的两幅图像进行小波分解,在小波变换域低频部分对小波系数用能量融合,高频部分采用分形分维进行融合,得到变换域中各个频带的融合图像,然后反变换进行重构,获取融合后的图像.实验结果表明,根据用分维进行数据融合的方法来确定两幅不同原图像在融合图像中所占的信息比例,可以有效地保留两幅原图像的边缘和纹理特征,避免融合图像平均化而出现的模糊现象,融合后的图像综合了两幅原图像的不同特征,使得处理后的图像更容易识别.因此,提出的双波段红外图像的小波分维融合算法是有效的,并且可以取得较好的效果.     

带钢表面缺陷在线检测系统的图像滤波算法

由于纹理背景的存在导致图像缺陷检测结果不准确是目前冷轧带钢表面缺陷在线检测过程中存在的主要问题之一.针对该问题提出了一种基于小波的各向异性扩散图像滤波方法,该方法通过小波分解得到图像的低频和高频分量,并针对高频分量采用小波扩散系数对小波系数进行正则化处理,最后进行小波逆变换,重构滤波后图像.实验结果表明该方法不仅能够有效地滤除不必要的纹理背景信息,而且能够较好地保留图像的细节信息,具有更好的综合性能,为带钢表面缺陷在线检测系统中的后续处理,如图像的边缘检测和自动分割等奠定了基础.     

应用于双光谱检测的图像融合技术

介绍双光谱图像检测系统的总体设计,针对紫外与可见光双光谱成像系统提出了基于模糊矩阵的双光谱图像融合法．该方法采用模糊矩阵表征融合区域,同时利用小波变换法对图像进行多分辨分解重构．实验选取UV图像与V图像进行融合,并对该方法和其他几种方法的融合图像进行了比较．基于模糊矩阵的双光谱图像融合法能比较好地兼顾图像融合中清晰度和融合边缘过渡两方面的要求．     

小波变换及骨架提取在图像边缘检测中的应用

提出了一种基于小波变换及骨架提取的图像边缘检测算法，该算法将小波变换、边缘点检测和骨架提取合并成一个完整过程，减少了图像中纹理对边缘提取的影响．实验结果表明，该算法有较好的边缘检测效果．     

利用对抗性边缘学习模型生成超分辨率图像

大部分基于卷积神经网络的图像超分辨率方法都是采用端到端的模式,这类图像超分辨率方法往往存在重构图像纹理边缘模糊、高频信息缺失的问题.为了改善该问题,在SRGAN(super-resolution generation adversarial networks)的基础上提出了一种基于对抗性图像边缘学习的深层网络模型,将图像边缘信息得到充分利用,来引导超分网络生成更加真实的高分辨率图像.该网络模型由两个生成对抗网络所组成,首先利用一个生成对抗网络来生成低分辨率图像所对应的高分辨率边缘特征图,然后再用高分辨率边缘特征图来约束和引导第二个生成对抗网络,使之重构出来的高分辨率图像纹理边缘更加清晰,更好地恢复图像边缘的高频细节.在Set5、Set14、BSD100、Urban100和Manga109基准测试集上的实验结果表明该算法重构出的高分辨率图像更加接近真实的图像,在峰值信噪比、结构相似度和感知指标上都有不错的表现.     

应用小波包变换的图像加权广义模糊增强算法

图像边缘细节富含高频成分,鉴于小波包分析具有对高频分辨率高的特点,提出一种应用小波包变换的图像加权广义模糊增强算法。对图像进行小波包分解,分别对各分解子图像进行基于线性广义模糊算子（LGFO）的模糊增强处理,重构前对各增强子图像赋予不同的权值,通过小波包图像重构实现对原始图像的加权模糊增强处理,获得细节丰富、对比度强的高质量增强图像。在基于边缘测度与噪声标准差的增强图像质量评估标准下,算法实现了模糊参数的自适应寻优。实验表明,增强图像轮廓准确、细节丰富。     

基于层间相关性的小波边缘检测

在计算机视觉系统当中，图像边缘检测占据着重要位置．图像成像过程中，噪声、畸变等因数引起图像细节模糊，如何有效提取图像边缘成为一个不断探索的课题．众所周知，采用Sobel、LapLacian边缘检测算子尽管能够有效地去除噪声的干扰，但是破坏了图像边缘细节．基于此，本文提出了一种基于层间相关性的小波边缘检测．在不同层间，如果低分辨率下的父系数绝对值大，则在高分辨率下四个相应的子系数的绝对值可能性也大，则其所代表地图像边缘信息可能性越大．因此，采用基于层间相关性的小波边缘检测算法既有效地去除噪声的干扰，又保留了图像边缘细节．     

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.     

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.     

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     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with