胡少兴
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- 姓名:胡少兴
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信息处理技术
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胡少兴,男,1972年生,北京大学视觉与听觉信息处理国家重点实验室博士后,现北京航空航天大学三维激光与工业内视技术研究室副教授。作为课题负责人承担了国家新青年教师博士点基金、国防基础预研、北京市创新团队资助计划科研协作项目、北京市教育委员会共建项目、三维信息获取与应用教育部重点实验室开放基金等科研项目10余项。在计算机视觉与模式识别、逆向工程、三维测量与可视化、几何建模、虚拟现实、计算机图形学、自动控制、面向制造行业的产品加工质量检测与分析等方面取得了一系列研究成果。
在计算机视觉和图像处理方面:搭建了由单摄像机和平面镜组成的摄像系统,建立了相应的数学模型;提出了平面镜与摄像机组成摄像系统的多传感器联合标定方法;建立了空间递推式群体相似颗粒运动规律检测模型,解决了近距离高速小目标检测与跟踪的难点问题。在逆向工程与虚拟现实方面:建立了大型场景几何信号处理体系,提出了基于激光与可见光数据的三维场景重建的工程方法;自主开发了大型场景多源数据基础处理软件;提出了复杂三维场景的激光扫描数据自动分割与三维特征提取方法,为多视点三维数据的配准、纹理映射、几何建模提供了可靠的基元特征;给出了基于轮廓特征的多视点三维数据全局配准方法,解决了直接将多视点三维数据整合在同一空间坐标系的大型场景三维重建关键问题。在基于工业CT三维重建方面:提出了采用亚像素定位和最小二乘B样条拟合提高断层图像边缘定位精度方法;给出了面向复杂断层轮廓集的分段三角化表面重建方法。在面向制造行业的产品加工质量检测与分析方面:针对加工制造业的迫切需求,在产品数字化基础之上,给出了产品加工质量全方位快速检测和分析的理论与方法,建立了产品加工质量检测和分析的统一理论框架。在系统开发方面,先后研制了基于计算机视觉的自由曲面非接触三维测量系统、近距离高速小目标检测与跟踪系统、便携式高精度三维激光扫描设备、事故现场重构系统、利用手持相机重构三维场景系统等。
已出版学术期刊及国际会议论文40余篇,其中EI正式收录20篇,ISTP正式收录9篇。申请国家发明专利1项。
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4704
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成果阅读
327
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成果数
7
胡少兴, 李俊江, 李保磊, 杨民
北京航空航天大学学报2007年11月第33卷第11期/Journal of Beijing University of Aeronautics and Astronautics November, 2007, Vol. 33, No. 11,-0001,():
-1年11月30日
CT图像环状伪影是由探测器像元响应不理想等因素造成的,它导致CT重建图像的降质,影响了图像的后续处理和量化分析。提出了一套完整的算法完成CT伪影校正:基于探测器像元通道响应不一致性的校正,通过偏置和增益校正对硬件响应不一致性进行补偿;基于投影正弦图的校正,通过数字滤波提取正弦图上残余的线状伪影,属于CT图像重建前的一种预处理校正方法;基于重建图像的校正,通过坐标变换将直角坐标系中的环状伪影变为极坐标系中的线状伪影进行处理,属于一种图像后处理方法。这些算法已经用于基于YXLON XRS232 9″图像增强器的CT重建,在保证图像质量的基础上环状伪影得到有效校正。
图像增强器, 计算机层析成像, 环状伪影, 正弦图, 响应不一致性
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【期刊论文】A High Precision Reconstruction Method of Dentition Defect 3D CAD Model
胡少兴, HU Shaoxing
,-0001,():
-1年11月30日
Reconstructing dentition defect model aims at assisting to remove, repair and make the partial dentures, which requests 3D model to support follow-up engineering redesign. Through processing dentition defect plaster casts of modification Kennedy Class II, we proposed a new method of 3D CAD modeling using ICT images. The method includes some key techniques: first, ICT image processing, accurately extract dentition edges from ICT images; Second, construct a full 3D dataset of Dentition Defect plaster cast; Finally, Generating 3D CAD dentition defect model. Our approach proposed contributes to the following removable partial denture CAD, finite element analysis and rapid prototyping (RP).
3D Reconstruction, ICT image, Image Processing
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【期刊论文】On-line Control of Manipulator Joint Based on RBFNN
胡少兴, LIU Haiyun, HU Shaoxing
,-0001,():
-1年11月30日
The on-line control strategy of Manipulator joint is proposed by using RBF (Radial basis function) neural network of characteristics with high accuracy, high-speed learning. Firstly, (RBF) neural network is applied to on-line control as a identifier, here the gradient descent method is used and improved. The center, width and weight of the network are regulated in order to reach the smallest error function. Then Jacobi matrix is obtained according to the calculated value. At last three parameters of controller are obtained by Jacobi matrix, thus obtain the purpose of on-line control. The simulation results of dynamics model have verified the proposed control scheme possesses characteristics of high-speed adjustment, and high-precision steady-state error and strong self-adaptive capability. This paper also proves mathematically the stability of the control system under the existence of disturbances and modeling errors.
radial basis function neural network, on-line, self-adaptive capability, manipulator joint
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29浏览
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【期刊论文】Extracting 3D Contour Features of Urban Scenes from Ground-Based Laser Range Data
胡少兴, Aiwu Zhang, Weidong Sun, Shaoxing Hu, Cheng Qian
,-0001,():
-1年11月30日
3D features of urban scenes are the most important basic elements, we present a method for extracting 3D features of urban scenes from ground-based laser range data. We give depth image representation, define vertical and horizontal scanline, and remove the invalid data including trees, cables, fences, cars, passers-by, outlies and so on. We employ local self-adaptive curve fitting extract line segments from main architecture structures. We introduce virtual feature conception for the first time, which indicates some implying structure features of urban scenes. The approach described in this paper has been implemented and applied to create the reconstruction of urban scenes. Experimental results show it is suitable to not only the modem buildings but also the classical architectures.
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55浏览
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【期刊论文】Real 3D Digital Method for Large-Scale Cultural Heritage Sites
胡少兴, Shao-xing HU, Hong-bin ZHA, Ai-wu ZHANG
,-0001,():
-1年11月30日
Digital preservation of cultural heritage sites has become a global problem. The paper proposes a real 3D digital method for culture heritage sites using 3D laser scanners and CCD cameras. Firstly, we preprocess the laser scans for noise removal and hole filling. Next step is using an improved ICP algorithm we present step-by-step registration to align all range scans into a common coordinate system. And then, we proposed a filtering of 3D data compression and use a volumetric-based algorithm for the construction of a coherent 3D mesh that encloses all range scans. Finally, through texture mapping, we obtain real 3D and real texture models. The example of the construction of the 3D model of buildings and grottos are presented.
Cultural Heritage Sites, Digitization, Laser scan, 3D model, Camera calibration, Texture mapping.,
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30浏览
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163下载
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【期刊论文】Registration of Multiple Laser Scans Based on 3D Contour Features
胡少兴, Shaoxing HU, Hongbin ZHA, Aiwu ZHANG
,-0001,():
-1年11月30日
When 3D laser scanner captures range data of real scenes, one of most important problems is how to align all range data into a common coordinate system. In this paper, we propose an algorithm of registration of multiple range data from real scenes using 3D contour features. Firstly, 3D contour features are extracted using self-adaptive curve fitting, and a searching structure of octree is built from the 3D contour features. Secondly, using mahalanobis distance, the leaf nodes are matched between two scans to compute original transform matrix, and then transform matrix is refined step by step through ICP until a best transform matrix is obtained. Lastly, a new global registration strategy is given based on the nearby principle. The experiments of multiple range data registration from indoor scenes, outdoor scenes and ancient buildings are done, and the results show the proposed algorithm is robust.
laser scanner, contour feature, mahalanobis distance, matching, registration.,
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26浏览
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85下载
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胡少兴, 张爱武, 孙卫东, 李风亭
电子学报2005年5月第33卷第5期/ACTA ELECTRONICA SINICA Vol.33, No.5, May,2005,-0001,():
-1年11月30日
本文根据TH-3DLCS-2001三维成像扫描仪可同步扫描激光与可见光数据的特点,提出了室外场景三维重建的系统方法。推导了激光与可见光采样点的配准关系,给出了每一激光采样点的RGB值;引入马氏距离,提出了基于反向投影的多机位三维数据快速配准算法,将多机位三维数据无缝拼合在同一坐标系内;依据Hough变换和模糊子集,划分室外三维数据场为房顶、墙面、窗户、地面、树木、其他物体等6类,并给出了网格剖分方法。实验证明本文所提出的方法有效地解决了室外场景三维重建的基本问题。
激光与可见光同步数据, 配准, 分割, 纹理映射, 三维建模
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