漫画风格的人脸肖像生成算法

为模拟艺术家画出的具有夸张效果的肖像漫画,由用户输入正面人脸照片,通过交互获取关键特征点,根据特征点计算面部特征值来判断需要夸张的部分和各自的夸张方式;然后根据特征点自动生成不同层级的网格并分层实施夸张变形;最后进行图像处理以获得不同艺术风格的图像.该算法从研究漫画家的作画风格入手,总结了肖像漫画特定的夸张规律,所生成的漫画风格人脸肖像效果较好,能够应用于非真实感图形学和数字娱乐等领域.     

基于相关分析的肖像素描漫画生成系统

目前,计算机生成肖像漫画的方法尚不能从漫画作品中有效地学习到人物五官之间的位置关系及相互作用,其生成的肖像漫画不够协调、生动。为此,通过分析人脸肖像漫画的作画规律,提出一种基于相关分析的肖像漫画生成方法。该方法从研究漫画家的作画风格着手,通过形状夸张和关系夸张来协调五官的位置关系及其相互作用,所生成的肖像漫画更为生动、形象,具有较好的协调性。通过与一种简单有效的非真实渲染方法结合,最终实现一个素描漫画生成系统。     

符合认知心理的三维人脸线条化评估方法

针对三维人脸几种典型的特征线条表达类型,结合人脸的领域知识和人脸识别认知机理,面向人脸线条化艺术方式,提出一种适用于人脸识别认知机理的人脸表情、朝向和五官的主观识别和评估方法.首先对大量的用户人脸进行识别测试,统计不同风格化线条在识别过程的准确率和效率,评估在不同表情和人脸区域中不同线条的表达能力;然后依据评估结论融合不同类型线条,生成人脸线条化优化绘制结果.实验结果表明,优化后的线条化结果更加有利于人脸的主观识别,该方法可推广至人脸肖像画、油画等多种风格,适用于人脸肖像具有象征主义的艺术表达形式.     

基于样本学习的人像线条画生成系统

介绍了一个基于样本学习的人脸线条画生成系统.该系统可以根据用户给定的正面人脸照片自动生成相应的人脸线条画.在系统中有两个关键技术,即非参数化采样方法和灵活的线条画模板.对于给定图像上的任意像素点及其邻域,通过在样本空间搜索并匹配所有的相似邻域,计算该像素点在相应的线条画上出现的条件概率;然后根据艺术家的风格和得到的条件概率绘制"期望的线条画";最后使用模板匹配得到最后的线条画.此方法可以生成高质量的正面人脸线条画.     

中国肖像画的风格转移算法

风格转移技术能快速生成目标艺术作品,但直接用在中国画上通常会存在特征分布不协调、人脸辨识不一致等问题.针对上述问题,文中提出基于卷积神经网络(CNN)的中国肖像画风格转移算法.首先,针对中国肖像画中写意和工笔两种绘画技法,提出笔触控制约束,指导图像的纹理分布.然后,提出国画特征移动距离,用于度量内容与风格特征,并将参考的中国画风格协调部署在肖像照上.最后,针对中国画的水墨色调和留白特点,提出水墨留白约束改进损失网络.实验表明,文中算法生成的结果不仅保证人脸辨识的一致性,而且在中国画艺术风格上表现更优.     

一种基于卡通画的线条画提取方法

给出了一种从卡通画中提取线条画的新方法.方法由三部分组成:线条提取、线条绘制和风格变换.给出了基于形态学方法细化图像,把结果中离散像素点深度优先遍历生成笔划路径集合,用不同细节来控制线条绘制,达到不同程度的抽象效果.给出了生成具有夸张风格的线条画的方法,实验结果显示用文中方法能从图像中抽象出生动的线条画.     

参数化的肖像漫画生成算法

现有计算机生成漫画的方法大多基于高层语义描述和图像模板的方式来实现,主要通过基于图像变形的算法达到漫画夸张的效果,更多关注的是夸张点的位置模板和夸张的比例,很少从艺术家的绘画本质,即线条来描述夸张的尺度。参数化的方法从艺术家绘画的本质线条出发,分析夸张的基本原理,构建组成人脸夸张各器官的线条元素,将漫画的夸张特征转换为一些可控制的参数,并通过局部参数的控制调整,实现不同艺术风格的漫画。实验证明该方法实现的漫画效果线条造型丰富,夸张效果突出,较好地还原了艺术家漫画夸张的线条表现本质。     

云南重彩画人脸肖像生成算法

通过对云南重彩画作画风格的研究,论文提出了云南重彩画人脸肖像生成 算法。首先从云南重彩画绘画作品中学习云南重彩画人脸绘制特点,引入特征比例对云南重 彩画人脸特征进行描述,发现云南重彩画人脸绘制特点,并归纳总结云南重彩画人脸绘制规 律。然后对输入的人脸照片进行轮廓线提取、特征点标定、特征值及特征比例的计算,将特 征比例与云南重彩画人脸特征比例进行比对,发现变形程度并进行变形。最后,根据主观辨 识后的经验值对五官特征的位置进行调整,再进行风格转换处理。运用该算法生成的云南重 彩画风格的人脸肖像,既与原图相似,又符合云南重彩画人脸绘制特点。     

新的蜡笔画风格生成方法

对真实蜡笔画的艺术特征和纹理结构分析,模拟了蜡笔画的颜色、纹理特点,提出了一种基于彩色图像的蜡笔画风格自动生成算法,实现了基于区域的均值漂移对输入图像迭代运算,完成了图像的色彩风格转换。在此基础上,提出了多噪声纹理模拟方法,分别实现了对图像色彩区域和轮廓区域的纹理模拟与添加,生成蜡笔画风格,从而达到计算机辅助生成蜡笔画的目的。该算法生成的结果图和手绘效果非常相似,适合教育、漫画插图和娱乐等领域的应用。     

基于人脸特征和线积分卷积的肖像素描生成

为了更好地模拟素描的笔画和突显肖像素描中五官的部分,提出基于人脸特征和线积分卷积的肖像素描生成方法.首先进行人脸分割,由人脸特征点确定GrabCut算法中每个特征的初始trimap,然后根据分割结果使用线积分卷积算法绘制肖像素描.文中使用了基于分割结果的多分辨率白噪声和方向场,并提出了基于分割结果的自适应性边界提取算法.实验结果表明,该算法改善了肖像素描的生成效果.     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

View-based model-driven architecture for enhancing maintainability of data access services

In modern service-oriented architectures, database access is done by a special type of services, the so-called data access services (DAS). Though, particularly in data-intensive applications, using and developing DAS are very common today, the link between the DAS and their implementation, e.g. a layer of data access objects (DAOs) encapsulating the database queries, still is not sufficiently elaborated, yet. As a result, as the number of DAS grows, finding the desired DAS for reuse and/or associated documentation can become an impossible task. In this paper we focus on bridging this gap between the DAS and their implementation by presenting a view-based, model-driven data access architecture (VMDA) managing models of the DAS, DAOs and database queries in a queryable manner. Our models support tailored views of different stakeholders and are scalable with all types of DAS implementations. In this paper we show that our view-based and model driven architecture approach can enhance software development productivity and maintainability by improving DAS documentation. Moreover, our VMDA opens a wide range of applications such as evaluating DAS usage for DAS performance optimization. Furthermore, we provide tool support and illustrate the applicability of our VMDA in a large-scale case study. Finally, we quantitatively prove that our approach performs with acceptable response times.     

A pragmatic multi-method investigation of discrepant technological events: Coping,attributions, and ‘accidental’ learning

Discrepant technological events or situations that entail a problem, a misunderstanding or a difficulty with the Information Technology (IT) being employed, are common in the workplace, and can lead to frustration and avoidance behaviors. Little is known, however, about how individuals cope with these events. This paper examines these events by using a multi-method pragmatic approach informed by coping theory. The results of two studies – a critical incident study and an experiment – serve to build and test, respectively, a theoretical model that posits that individuals use a variety of strategies when dealing with these events: they experience negative emotions, make external attributions, and adopt engagement coping strategies directed at solving the event, eventually switching to a disengagement coping strategy when they feel they have no control over the situation. Furthermore, users’ efforts may result in ‘accidental’ learning as they try to overcome the discrepant IT events through engagement coping. The paper ends with a discussion of the results in light of existing literature, future opportunities for research, and implications for practice.     

The Distributed Time-Triggered Simulation Scheme: Core Principles and Supporting Execution Engine

Distributed real-time simulation is a young technology field but its practice is under increasing demands. In recent years the author and his collaborators have been establishing a new approach called the distributed time-triggered simulation (DTS) scheme which is conceptually simple and easy to use but widely applicable. The concept was initiated in the course of developing a new-generation object-oriented real-time programming scheme called the time-triggered message-triggered object (TMO) programming scheme. Some fundamental issues inherent in distributed real-time simulation that were learned during recent experimental studies are discussed along with some approaches for resolving the issues. An execution engine developed to support both the TMOs engaged in control computation and the TMOs engaged in DTS is also discussed along with its possible extensions that will enable significantly larger-scale DTSs.     

Software-Konfigurationsmanagement in großen Softwareprojekten

Zusammenfassung Mit zunehmender Größe der Softwaresysteme verschärfen sich die für die Software-Herstellung typischen Probleme: Beherrschen großer Objektmengen, Erhalten der Systemkonsistenz, Kontrolle der ständigen Änderungseinflüsse und Gewährleisten einer langen Lebensdauer. Die Disziplin Konfigurationsmanagement bildet den methodischen Ansatz, diese Probleme besser zu beherrschen. Software-Konfigurationsmanagement faßt die Herstellung von Softwaresystemen als eine Abfolge von kontrollierten Änderungen an gesicherten Zwischen- und Endergebnissen auf. Dargestellt werden die Objekte und Funktionen des Software-Konfigurationsmanagements sowie die hierfür in großen Software-Projekten benötigten Methoden, Instanzen und Hilfsmittel.     

Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and     

Editorial:Brain-machine interface(BMI) and cyborg intelligence

正Brain-machine interfaces(BMIs)aim at building a direct communication pathway between the brain and an external device,and represent an area of research where significant progress has been made during the past decade.Based on BMIs,mind information can be read out by neural signals to control     

Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and overseas to the world’s scientific circles,especially to stimulate     

SCIENCE CHINA Information Sciences SUBJECT INDEX TO VOLUME 57(2014)

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Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and overseas to the world’s scientific circles,especially to stimulate