Affective Image Colorization

Colorization of gray-scale images has attracted many attentions for a long time.An important role of image color is the conveyer of emotions(through color themes).The colorization with an undesired color theme is less useful,even it is semantically correct.However this has been rarely considered.Automatic colorization respecting both the semantics and the emotions is undoubtedly a challenge.In this paper,we propose a complete system for affective image colorization.We only need the user to assist object segmentation along with text labels and an affective word.First,the text labels along with other object characters are jointly used to filter the internet images to give each object a set of semantically correct reference images.Second,we select a set of color themes according to the affective word based on art theories.With these themes,a generic algorithm is used to select the best reference for each object,balancing various requirements.Finally,we propose a hybrid texture synthesis approach for colorization.To the best of our knowledge,it is the first system which is able to efficiently colorize a gray-scale image semantically by an emotionally controllable fashion.Our experiments show the effectiveness of our system,especially the benefit compared with the previous Markov random field(MRF) based method.     

典型结艺产品三维结构快速设计方法

中国传统结艺产品结构复杂、设计方法原始,需要数字化设计技术的辅助来提高设计效率并增强创新.为此,提出了基于编织结构建模技术的结艺产品三维快速设计方法,以平面矢量曲线设计稿为蓝本,自动转化生成三维模型结构.该方法利用交叉点挑压状态的自动识别,配合用户交互修正得到正确的结构形式,从而回避了复杂交织结构的数学建模;针对典型结艺产品的囊状与翼状结构组合,利用平面矢量图分割、锁边连接和牵连连接来实现复杂三维结构的快速生成.实验结果表明,文中方法通过连接模式的自动识别和交互修正降低了对设计者的技术要求,简化了设计过程的复杂性.     

可调湿发泡缓冲包装材料的制备及性能研究

利用微波发泡法制备一种新型的功能性发泡缓冲包装材料,采用热场发射扫描电子显微镜及微机控制电子万能试验机对发泡淀粉基调湿材料的表观形貌及力学性能进行测试,探讨了淀粉含量、丙烯酸-丙烯酸钠混合溶液与丙烯酰胺质量比、丙烯酸中和度及初始水含量对发泡淀粉基调湿材料性能的影响。结果表明:当淀粉含量为10.5%wt、丙烯酸-丙烯酸钠混合溶液与丙烯酰胺质量比为4.5∶1、丙烯酸中和度为80%、初始水含量为10 g时,发泡淀粉基调湿材料的平台应力和缓冲系数分别达到0.363 MPa和3.618,单位体积吸收的能量为0.326 J/cm;发泡淀粉基调湿材料的吸/放湿率随淀粉含量的增加而降低,随丙烯酸-丙烯酸钠混合溶液与丙烯酰胺质量比、丙烯酸中和度及初始水含量的增加而增加。     

A driving simulator study to explore the effects of text size on the visual demand of in-vehicle displays

Modern vehicles increasingly utilise a large display within the centre console, often with touchscreen capability, to enable access to a wide range of driving and non-driving-related functionality. The text provided on such displays can vary considerably in size, yet little is known about the effects of different text dimensions on how drivers visually sample the interface while driving and the potential implications for driving performance and user acceptance. A study is described in which sixteen people drove motorway routes in a medium-fidelity simulator and were asked to read text of varying sizes (9 mm, 8 mm, 6.5 mm, 5 mm, or 4 mm) from a central in-vehicle display. Pseudo-text was used as a stimulus to ensure that participants scanned the text in a consistent fashion that was unaffected by comprehension. There was no evidence of an effect of text size on the total time spent glancing at the display, but significant differences arose regarding how glances were distributed. Specifically, larger text sizes were associated with a high number of relatively short glances, whereas smaller text led to a smaller number of long glances. No differences were found in driving performance measures (speed, lateral lane position). Drivers overwhelmingly preferred the ‘compromise’ text sizes (6.5 mm and 8 mm). Results are discussed in relation to the development of large touchscreens within vehicles.     

Use of a laser camera scanner to highlight the surface degradation of stone samples subjected to artificial weathering

A vision technique system was implemented in order to highlight the deterioration developing on the surfaces of stone samples during an artificial ageing test with marine spray. The system, which employs a matrix CCD camera and a laser beam, provides various kinds of information about the decay suffered by the stone samples, by comparing two types of visual information at different times throughout the ageing test: the partial digital images of the sample surfaces and then the surface relief and laser light reflection obtained by casting a sheet of laser light on to the material. The accuracy of the laser camera scanner is evaluated in the first part of this paper. The methodology was successfully used to identify the degradation morphologies occurring on five types of limestone exposed to salt spray, and to quantify the deterioration using statistical parameters computed from digitized visual data.     

木质纤维素-g-丙烯酸/蒙脱土水凝胶制备及吸附性能研究

以原位插层共聚法合成木质纤维素接枝丙烯酸/蒙脱土三维网络水凝胶(LNC-g-AA/MMT),探讨了丙烯酸与木质纤维素的质量比、丙烯酸单体浓度、中和度、引发剂用量和交联剂用量等因素对三维网络水凝胶吸附亚甲基蓝性能的影响,吸附量高达1994.38mg/g,并对最佳条件下吸附饱和的LNC-g-AA/MMT进行解吸研究,脱附率高达83.4%。用XRD、TEM和TG等方法对三维网络水凝胶的形貌和结构进行了表征。结果表明,木质纤维素接枝丙烯酸三维网络水凝胶(LNC-g-AA)插层进入蒙脱土层间,蒙脱土结晶结构在反应过程中被破坏,形成剥离型纳米复合材料,LNC-g-AA/MMT的热稳定性较LNC-g-AA有所改善。     

激光跟踪中目标卫星表面BRDF对回波信号的影响

通过双向反射分布函数(BRDF)公式,模拟了空间激光主动照明跟踪中,相同材料、不同粗糙度下卫星表面的BRDF,得出了随着卫星表面材料粗糙度的增加,镜面反射分量越小,漫反射分量越大,双向反射分布散射角越宽,接收到的回波信号对方向的敏感性减小。同时模拟了入射角度对卫星表面BRDF的影响,得出了照明光束小角度入射、接收信号方向与照明光束方向一致时,镜面反射分量的增加增强了反馈信号,当大角度入射时,反馈信号急剧减小。当入射角大于34°时,通过卫星表面BRDF计算得到的最小接收功率,比之前把卫星目标看成朗伯体,通过激光雷达公式计算得到的最小接收功率小。得出了增加照明光束的发射功率为原来的5倍,或者增大接收口径为原来的2.5倍,可以消除大入射角度带来的接收功率的减小,使得系统有4倍的功率余量。     

The Jerwood Applied Arts Prize Exhibition 2002: Textiles. Crafts Council Gallery,London 19 September–3 November 2002

Abstract

Debates over copyright and craft are particularly thorny, jumping as they do from notions of a common shared history of quilting bees and knitting circles that should be open and welcoming to all, passing through the idea that as an apparently gendered pastime crafting is regularly devalued (and that this is something its practitioners should resist) and concluding with more recent arguments that there are lucrative opportunities for professional crafters and designers that need to be protected through the copyrighting, patenting and trademarking of designs and processes. Of late, however, calls for ever more stringent protection and policing have marked the online crafting world, a transformation that I connect (albeit indirectly) to massive changes in the global textile industry and increasing anti-piracy initiatives resulting from the 2005 end of the Multifibre Arrangement (MFA). In this article, I analyze the appearance and spread of this intimidating lexicon of copyright protection in the (online) craft world. I argue that the rising interest in copyright and craft needs to be seen not only in light of growing visibility and marketability for crafting practice online, but also in terms of the positioning of intellectual property as an increasingly important economic strategy for Global North nations. So too, a transition from an ethos of community-based practice to one of individual property rights can be read as a part of ongoing debates over copyrighting (or lack thereof) for fashion designers, regulations concerning craft and textiles as protected national property in indigenous, developing and transitional economies, the changing global textile industry, and further debates over open source software and anti-copyright activism. My purpose here is to understand how and why a reiteration of (often incorrect or unsupported) norms is creating a strong atmosphere of policing and protection that contrasts with more traditional understandings of crafting.     

基于人机工程学的虚拟机械手臂运动控制方法

考虑到机械手臂在运动时会受到关节阻尼的作用,使手臂控制的全局稳定性降低的问题,提出一种基于人机工程学的虚拟机械手臂运动控制方法.首先,利用人机工程学构建人体模型架构,将其分为架构层、形态层与尺寸层,并以参数化形式描述表示;然后,通过解析人体模型获取各个关节的连接作用与功能,并计算虚拟机械手臂的运动坐标和运动矢量;再根据雅克比矩阵计算得到机械手臂末端的运动速度;最后,通过构建模糊逻辑系统得到控制模糊隶属度函数,并拟定为输入量输入至运动控制器内,完成对机械手臂的运动控制.