Coherent Streamline Generation for 2-D Vector Fields

来源 :Tsinghua Science and Technology | 被引量 : 0次 | 上传用户:yh920927
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Visualizing 2-D vector fields using streamlines is one popular ?ow visualization technique.Standard streamline generation algorithms compute the density of streamlines across the domain,detect features,and employ customized rules to emphasize features.
其他文献
In order to determine the design tide levels in the areas without measured tide level data, especially in the areas where it is difficult to measure tidal levels, a calculation method based on a numer
期刊
Seismic anisotropy and its main features along the convergent boundary between Africa and Iberia are detected through the analysis of teleseismic shear-wave splitting.Waveform data generated by 95 tel
期刊
Shape analysis plays a fundamental role in computer graphics.We present a novel global and intrinsic shape representation for shape analysis,called stable geodesic signature.It is based on the theory
期刊
Affine ellipses/ellipsoids based bounding volumes are widely used in various graphics applications,such as ray tracing and collision detection.They provide a much tighter fit than the regular ellipses
期刊
为提高虹膜识别的准确度,提出采用第二代曲波变换提取虹膜图像纹理特征的方法。首先将预处理后的虹膜图像进行曲波分解,然后采取不同方法对曲波分解后的低通和带通子带进行特征提取,并根据各带通子带的能量大小赋予不同的加权系数,最后采用欧式距离进行虹膜特征匹配。在4种虹膜图像库上测试表明,提出的虹膜图像纹理特征提取方法具有较高的识别率,与Harr小波和DCT(离散余弦变换)相比,特征提取时间相当,但识别率相对
期刊
In the decade of data explosion, a significant challenge is how to transform data into understandings and insights that are useful to people. Visualization,the use of computer-supported, interactive v
期刊
方向场估计是指纹识别过程中非常重要的步骤。传统方向场提取算法存在着3个较为严重的问题:指纹质量较低时,无法获得满意的结果;无法在背景区域获得可靠的方向场;基于模型的方法,如Legendre模型或FOMFE模型,在奇异区域会产生较大偏差。针对这些问题,该文改进了基于复数滤波的质量评价方向,并提出了一种融入指纹质量的扩散方程来提取指纹方向场。为了验证算法的有效性,在各种质量的指纹图像上进行了实验。实验
期刊
The node-link diagram is an intuitive way to depict a graph and present relationships between entities.Addressing the visual clutter induced by edge crossing and node-edge overlapping is a challenging
期刊
Recently,sequential document visualization has attracted much attention for its superior capability in depicting the sequential semantic progression in a single document.However,existing methods commo
期刊
Ultra-scale data analysis has created many new challenges for visualization.For example,in climate research with two-dimensional time-varying data,scientists find it crucial to study the hidden tempor
期刊