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2D Sub-Pixel Disparity Measurement Using QPEC/Medicis
2D Stereo Matching Sub-pixel Disparity Geometric Calibration QPEC Medicis
2016/7/4
In the frame of its earth observation missions, CNES created a library called QPEC, and one of its launcher called Medicis. QPEC / Medicis is a sub-pixel two-dimensional stereo matching algorithm that...
Tumble! Splat! Helping Users Access and Manipulate Occluded Content in 2D Drawings
Layer management 2D drawing occlusion interaction technique
2016/5/24
Accessing and manipulating occluded content in layered 2D drawings
can be difficult. This paper characterizes a design space of
techniques that facilitate access to occluded content. In addition,
w...
When we map an area or create a digital database for it, the first task is often to partition the space into smaller units.There are traditionally two methods of partition called vector and raster. A ...
北京大学深圳研究生院新材料学院2D材料成果被列入“2015年度二次电池领域20大重磅事件”（图）
北京大学深圳研究生院新材料学院 2D材料 2015年度二次电池领域20大重磅事件”
2016/4/29
“新材料在线”和一些媒体网站评出“2015年度二次电池领域20大重磅事件”，其中“北京大学发现新型单双层二维材料，可在锂电池中应用”被列入，具体内容为“在潘锋教授的指导下，北京大学深圳研究生院新材料学院2014级直博生刘同超和博士后冯炎聪等人与团队老师和同学合作，意外发现了一种全新只有单层/双层Fe3(PO4)2226;8H2O二维材料，并实现了这种二维材料单双层的可控制备。该项工作得到了国...
基于2D激光探测的立木胸径几何算法优化
立木胸径 2D激光扫描仪 几何类算法 拟合方程
2016/12/21
目前林业测绘中使用2D激光扫描仪对树干立木胸径及位置的测定研究占据重要地位。针对3种较为常用的几何类算法（弧长法、切线法和双余弦法），提出在近距离下利用补偿角对其测量值进行补偿的方案，研究了弧长法与切线法补偿角随距离的变化关系，并进行回归分析，所得拟合方程的R2均大于0.85。运用拟合方程在0~5.5m范围内对实际树干进行验证，试验选取了5株杨树树干，通过算法补偿，半径与距离测量值的准确性均得到提...
圆形传感器阵列运动多目标2D DOA估计
DOA估计 运动多目标 独立分量分析 圆型阵列
2016/3/3
针对雷场低空运动多目标方向角估计中，现有算法需要设置立体传感器阵列，且估计精度还不能满足实战化要求等问题，提出了基于圆形传感器阵列的运动多目标二维波达方向估计方法;该方法用向量来表示方向角，采用独立分量分析算法，并结合波束形成算法，实现运动多目标方向角估计;场地实验表明:该方法能够准确地识别运动多目标的数目，其二维波达方向估计精度比基于小波加权的相关时延算法要好，为提高雷场运动多目标识别率和定位精...
IMPROVING 2D CHANGE DETECTION BY USING AVAILABLE 3D DATA
Remote Sensing Change Detection Updating Segmentation 3D Object Oriented
2015/12/31
Change detection with very high resolution imagery is difficult, because 3D objects as buildings appear differently in 2D imagery due to varying viewing angles and sun positions. This research propose...
On the Graph-Based Panorama Construction for 2D Large-Scale Microscope Images
mosaicing graph panoramic image spanning tree
2015/12/16
On analysis of existing images mosaicing methods, the conception of mosaicing graph is introduced and some principles to construct
high quality panorama are presented in the paper. Image registration...
A Test of 2D Building Change Detection Methods: Comparison, Evaluation and Perspectives
Change Detection 2D Vector Databases Algorithms Comparison Quality Assessment
2015/12/16
In the past few years, 2D topographic databases have been completed in most industrialised countries. Most efforts in National Mapping and Cadastral Agencies (NMCAs) are now devoted to the update of s...
REPRESENTATION OF GRADIENTS OF A SCALAR FIELD ON THE SPHERE USING A 2D FOURIER EXPRESSION
2D Fourier series gradients representation coefficients D-functions spectral transfers
2016/1/18
Representation of data on the sphere is conventionally done using spherical harmonics. Making use of the Fourier series of the Legendre function in the SH representation results in a 2D Fourier expres...
Connected 2D and 3D Visualizations for the Interactive Exploration of Spatial Information
Geovisualization Three-dimensional representation Interactive
2015/12/3
This paper describes the concepts and the successful prototypal implementation of interactively connected 2D information visualizations and data displays in 3D virtual environments for the interactive...
A Neural Network Algorithm for Vectorization of 2D Maps
Spatial Information Sciences Analysis Artificial_Intelligence Accuracy CAD
2015/12/2
In the last twenty-five years a great number of vectorization methods were developed. In this paper we first give an overview about the most known methods, and then propose a vectorization algorithm b...
滚轮压扭型2D电液比例方向阀特性分析
电液比例方向阀 滚轮压扭 流量滞环 颤振补偿
2016/12/21
设计了一种滚轮式双向压扭联轴器，以球型滚轮代替滚动轴承，既简化了压扭联轴器的加工，也减小了摩擦阻力；可实现比例电磁铁直线运动和阀芯旋转运动的转换，同时放大阀芯旋转扭矩，并将其与双向比例电磁铁和2D方向阀共轴联接，组成一种压力高、流量大、结构简单的位置反馈型2D电液比例方向阀。进而建立了该阀的数学模型，应用Matlab软件对阀的特性进行了仿真分析。实验结果表明：滚轮型压扭联轴器具有良好的输入输出特性...
Generative Models and Markov Chain Monte Carlo Techniques for Detection and Reconstruction of Stairs from 2D Point Clouds
Building Stairs Detection Reconstruction Markov Chain Monte Carlo MAP Estimation Generative Model Point Cloud
2015/10/12
The paper describes an approach for the automatical reconstruction of homogeneous straight stairs from point cloud data by using a
generative model and Markov Chain Monte Carlo techniques for estima...
BUILDING 3D MAPS WITH SEMANTIC ELEMENTS INTEGRATING 2D LASER, STEREO VISION AND IMU ON A MOBILE ROBOT
3D mapping sensor integration autonomous robots
2015/10/8
Building 3D models is important in many applications, ranging from virtual visits of historical buildings, game and entertainment, to
risk analysis in partially collapsed buildings. This task is perf...