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《计算机辅助设计与图形学学报》2016,(5)
本文将力反馈技术引入虚拟绘制过程,提出一种基于力反馈技术的笔道仿真方法.首先通过分析力对毛笔变形的影响机理,采用弹簧-振子模型构建了一种新的毛笔力反馈仿真模型;然后通过计算毛笔模型变形时每个采样点处的笔触形状,得到笔触变化的时间序列,获得完整的笔道,实现力对笔道的动态控制.文中利用Phantom Desktop力反馈设备,成功地实现了具有力觉反馈的笔道仿真.仿真结果表明,该方法再现了传统笔道绘制中通过力触觉控制绘制的过程,有效地增强了虚拟绘制过程的真实感. 相似文献
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随着煤矿安全的数字化管理,基于3D技术的煤矿系统虚拟现实成为煤矿安全中进行安全培训的重要技术手段。本文以OGRE引擎为软件开发环境设计煤矿安全虚拟现实3D软件,阐述OGRE的软件结构、煤矿安全虚拟现实3D软件的构成、3D模型的建模方法和实现方式,设计具有运动功能的3D模型的操作和控制方法。对煤矿安全管理和数字化煤矿的建设具有现实意义。 相似文献
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《计算机辅助设计与图形学学报》2016,(6)
将力反馈技术引入虚拟绘制过程,提出一种基于力反馈技术的干笔飞白仿真方法.该方法根据毛笔模型受力后的形态变化,提出一种笔道绘制算法;通过分析不同运笔方式下的飞白特征以及力对飞白的影响,建立了飞白纹理库;采用纹理映射和纹理融合技术将飞白纹理映射到笔道,实现了干笔飞白的计算机仿真.文中方法已成功地应用于基于力反馈技术的虚拟绘制系统,仿真效果良好. 相似文献
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提出了一种基于模型的水下航行器推进用直流电机的健康监测方法,通过对电机的关键模型参数进行监测,达到监测电机健康状态的目的.以电机的3种典型故障模式为例,建立电机的辨识模型,采用最小二乘算法对模型参数进行辨识,得到反映系统健康状态的特征参量,并采用趋势预测算法对3种典型故障进行仿真评估.仿真结果表明,所提出的方法能较好地... 相似文献
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提出了一种高效地构建开放式的机器人3D仿真环境的方法.该方法以Matlab软件为平台,充分结合Pro/E等3D实体设计软件、Matlab机器人工具箱和Matlab 3D动画技术建立可视化程度高、细节显示逼真的机器人3D仿真研究平台.以应用广泛的VA1400弧焊机器人为例,详细介绍了机器人3D仿真模型的建立、仿真实体的数据导入和仿真系统的3D动画演示等步骤,最终得到一个系统软件开放程度高、可视化效果逼真的机器人3D仿真环境.给出了仿真系统的部分显示效果,验证了本方法的有效性. 相似文献
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The Synthesis of Rock Textures in Chinese Landscape Painting 总被引:7,自引:0,他引:7
In Chinese landscape painting, rock textures portray the orientation of mountains and contribute to the atmosphere. Many landscape-painting skills are required according to the type of rock. Landscape painting is the major theme of Chinese painting. Over the centuries, masters of Chinese landscape painting developed various texture strokes. Hemp-fiber and axe-cut are two major types of texture strokes. A slightly sinuous and seemingly broken line, the hemp-fiber stroke is used for describing the gentle slopes of rock formations whereas the axe-cut stroke best depicts hard, rocky surfaces. This paper presents a novel method of synthesizing rock textures in Chinese landscape painting, useful not only to artists who want to paint interactively, but also in automated rendering of natural scenes. The method proposed underwrites the complete painting process after users have specified only the contour and parameters. 相似文献
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In this paper, we propose an off-line recognition method for handwritten Korean characters based on stroke extraction and representation. To recognize handwritten Korean characters, it is required to extract strokes and stroke sequence to describe an input of two-dimensional character as one-dimensional representation. We define 28 primitive strokes to represent characters and introduce 300 stroke separation rules to extract proper strokes from Korean characters. To find a stroke sequence, we use stroke code and stroke relationship between consecutive strokes. The input characters are recognized by using character recognition trees. The proposed method has been tested for the most frequently used 1000 characters by 400 different writers and showed recognition rate of 94.3%. 相似文献
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文中介绍了一种无笑序手写汉字在线识别方法,提出了基于汉字笔画数的编码方法。整个识别过程为两大部分,首先进行笔画分类,然后根据笔画序列码和汉字的结构完成入手 写何不在于识别。由于本系统要求可以无笔序地进行汉字输入,给汉分类带的来很大的困难,为此,在汉字结构匹配时,提出了一种结构特征搜索及排索算法,很好地解决了要求无笔序输入所带来的问题,实践证明,这种方法用于无笔序手汉字的在线识别是非常有效的。 相似文献
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汉字笔段形成规律及其提取方法 总被引:8,自引:0,他引:8
该文从点阵图像行(列)连通像素段出发,研究汉字图像的笔段构成,发现汉字点阵图像仅由阶梯型笔段和平行长笔段两种类型的笔段构成,并归纳出阶梯型笔段和平行长笔段的形成规律.以笔段形成规律为基础提出了汉字笔段的提取方法,该方法将像素级汉字图像转变为以笔段为单位的图像,有利于汉字识别、汉字细化及汉字字体的自动生成.最后该文给出了印刷体和手写体汉字笔段提取的实验结果. 相似文献
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陈来国 《数码设计:surface》2008,(2):173-174
绘画的哲学层次,道与天地的概念,贯穿在整个山水画美学之中。我们知道水的灵动,山的厚重,山水相联,又相互映衬而构成一幅幅出色的山水画。中国的山水画强调山与水的交融,凸显和谐之美。本文通过对山水树木,云天湖泊与时间和空间的特殊画面结构将大自然的这三个世界联结在一起的,提出山水画美学观。 相似文献
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Model-based stroke extraction and matching for handwritten Chinese character recognition 总被引:11,自引:0,他引:11
This paper proposes a model-based structural matching method for handwritten Chinese character recognition (HCCR). This method is able to obtain reliable stroke correspondence and enable structural interpretation. In the model base, the reference character of each category is described in an attributed relational graph (ARG). The input character is described with feature points and line segments. The strokes and inter-stroke relations of input character are not determined until being matched with a reference character. The structural matching is accomplished in two stages: candidate stroke extraction and consistent matching. All candidate input strokes to match the reference strokes are extracted by line following and then the consistent matching is achieved by heuristic search. Some structural post-processing operations are applied to improve the stroke correspondence. Recognition experiments were implemented on an image database collected in KAIST, and promising results have been achieved. 相似文献
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完全基于结构知识的汉字笔画抽取方法 总被引:17,自引:1,他引:16
从汉字结构知识出发,提出了一种从汉字图像直接抽取笔画的算法,给出了抽取横、竖、撇、捺4种笔画的完全量化的昨去除不同字体的笔画修饰噪声的规则,该方法较好地解决了各笔画的相交、相连及噪声排队等总理2,综在汉字识别及字体自动生成等汉字信息处理方面有重要作用。 相似文献
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Extracting perceptually meaningful strokes plays an essential role in modeling structures of handwritten Chinese characters for accurate character recognition. This paper proposes a cascade Markov random field (MRF) model that combines both bottom-up (BU) and top-down (TD) processes for stroke extraction. In the low-level stroke segmentation process, we use a BU MRF model with smoothness prior to segment the character skeleton into directional substrokes based on self-organization of pixel-based directional features. In the high-level stroke extraction process, the segmented substrokes are sent to a TD MRF-based character model that, in turn, feeds back to guide the merging of corresponding substrokes to produce reliable candidate strokes for character recognition. The merit of the cascade MRF model is due to its ability to encode the local statistical dependencies of neighboring stroke components as well as prior knowledge of Chinese character structures. Encouraging stroke extraction and character recognition results confirm the effectiveness of our method, which integrates both BU/TD vision processing streams within the unified MRF framework. 相似文献