【摘 要】
:
We present an efficient polygonization approach for tree trunks modeled by line skeleton-based convolution surfaces.A quad-dominated non-convex bounding polyhedron is firstly created along the skeleto
【出 处】
:
Science China(Information Sciences)
论文部分内容阅读
We present an efficient polygonization approach for tree trunks modeled by line skeleton-based convolution surfaces.A quad-dominated non-convex bounding polyhedron is firstly created along the skeleton,which is then tetrahedralized and subdivided into
其他文献
如何合理进行码率分配达到充分利用码率资源目的,提高视频的主观视觉质量一直是视频编码领域研究的关键问题。本研究首先提出一种基于人眼视觉注意检测模型,该模型的核心思想是针对人眼不同时间段内进行眼动策略分析;然后结合显著计算得到图像注视区域结果得到SVC增强层码率分配算法。实验测试结果表明本研究提出的算法与现有其他算法相比具有更为有效的模拟人眼视觉注意的特性,在有限网络带宽条件下使得人眼视觉效果得到显著
为解决堆石混凝土(RFC)施工现场依靠人工巡视目测堆石质量的方法的不足,该文提出了一种用于堆石仓面质量管理的方法。该方法首先在施工现场采集堆石仓面的图像;其次对堆石图像上的视觉信息进行分析处理,为解决数字图像上石块间重叠、接触给石块识别带来的困难,应用分水岭算法实现块石的识别,进而提取块石粒径;最后得到堆石的级配曲线,从而对堆石仓面的质量进行等级评价。对在施工现场拍摄的堆石图像进行处理,将自动识别
为解决常用的基于图像像素连通性的分类标识算法和当前的基于密度可达性的快速算法在处理类似线粒体等分布不连续的荧光图像上存在标识不稳定和误标识的问题,通过改进基于密度的算法在搜集对象上的策略,采用基于局部密度提取的搜集方法。结果表明:对于不连续分布的荧光图像,这种方法可以很稳定的给出符合实际的分类标识结果,优于基于连通性和基于密度的快速算法,准确率和稳定性较高。
The possibilities of combining the dissolution of short-range-order minerals (SROMs) like allophane and imogolite, by ammonium oxalate and a particle size distribution analysis performed by the pipett
Aluminum (Al) is very toxic to many living organisms, including plants, animals and microorganisms. However, despite many studies on Al tolerance in plants, little has been reported concerning these m
Soil dissolved phosphorus (P) and colloidal P mobilization could be closely related to the degree of phosphorus saturation (DPS). Effects of a wide range of DPS on the distributions of dissolved P and
With the portable Fourier Transform Infrared Spectroscopy (FTIR), the reflectance spectra of soil samples with different moisture content are measured in laboratory for expounding the characteristic o
目的评价多层CT心肌动态灌注成像时一种新的迭代重建算法的辐射剂量、影像质量、信噪比和对比噪声比。材料与方法对6头猪的一支动脉进行次全球囊闭塞后,进行心电门控的256层螺旋CT心肌动态灌注成像。比较两种100kV的方案:高剂量,150mAs;低剂量,100mAs。采用滤波反投影法(FBP)对高剂量影像进行重建,采用滤波反投影法和不同程度的迭代重建算法(L1,L4和L7)对低剂量影像进行重建。比较高剂
交互技术是实现用户和计算机之间数据交流不可缺少的环节,它为计算机图形学教学提供了技术支持。在此以直线段的绘制为例,将直线段绘制功能封装成CLine类的成员函数、坐标录入界面映射为CCanshuShezhiDialog类,通过菜单项点击事件的响应实现绘图功能,探讨了交互技术在计算机图形学教学中的应用,这为计算机图形学教学提供了参考。
Real-time estimation of outdoor illumination is one of the key issues for ensuring the illumination consistency of augmented reality.In this paper,we propose a novel framework to estimate the dynamic