卢荣胜
从事光学、三维机器视觉、数字图像处理以及基于视觉成像方法的表面在线检测技术方面的研究
个性化签名
- 姓名:卢荣胜
- 目前身份:
- 担任导师情况:
- 学位:
-
学术头衔:
博士生导师
- 职称:-
-
学科领域:
机械工程
- 研究兴趣:从事光学、三维机器视觉、数字图像处理以及基于视觉成像方法的表面在线检测技术方面的研究
卢荣胜,男,工学博士,合肥工业大学仪器科学与光电工程学院教授,博士生导师。2006-2010年教育部高等学校光电信息科学与工程专业教学指导分委员会委员。
卢荣胜教授近几年一直在国内与国外从事光学、三维机器视觉、数字图像处理以及基于视觉成像方法的表面在线检测技术方面的研究。近年来,在天津大学精密测试技术与仪器国家重点实验室做博士后期间、合肥工业大学工作期间和香港城市大学担任Senior Research Associate期间,得到了国家重点实验室基金、合肥工业大学人才引进基金、国家自然科学基金、香港研究资助局基金的资助,对基于标定方法的多传感器三维机器视觉在线检测技术与不标定三维场景重构理论与应用技术进行了广泛深入的研究。在英国Imperial College London光学与机器视觉研究室担任 Research Associate期间和英国University of Huddersfield计算与工程学院担任Research Fellow期间,在英国工程与物理科学研究局(EPSRC)基金资助下,对基于机器视觉成像方法的表面质量在线检测技术, 进行了许多探索性研究。主要研究成果有:
1.在基于标定方法的多传感器三维机器视觉在线检测技术研究方面,解决了多传感器三维机器视觉在线检测技术中的许多关键问题,研究论文曾被大型国际会议授予最佳论文奖。
2.在不标定三维场景重构理论与技术方面进行了创新性研究,即:基于编码结构光主动视觉测量原理,提出了在可变场景环境中,采用伪随机彩色序列编码闪光照明、数码相机摄像的方法,仅用一幅空间编码二维数字图象,在摄像机参数可变未知的条件下,不需标定,在欧氏空间自适应测量重构三维场景的理论与技术。
3.开发出了激光扫描多频道成像表面质量在线检测技术。在研究中发现照射到不同物体表面上的激光被物体散射后,散射光场中包含的物体表面质量信息(如表面缺陷、微观三维形貌、表面表面粗糙度等),可以通过角度分辨多频道成像的方法来分离。通过研究,成功地研制出了一种多频道成像激光扫描仪,可以用于各种金属和非金属大面积表面质量在线检测。
4. 基于机器视觉成像方法,提出了三种视觉成像表面粗糙度在线测量方法,即从一幅表面加工痕迹微观形貌纹理图像、散射光强空间分布图像和光学散斑场纹理分布图像中提取表面粗糙度的方法。研究成果发表于英国物理研究院(IOP) 的学术刊物Measurement Science and Technology和美国光学学会会刊Applied Optics 和Journal of the Optical Society of America A 上。
卢荣胜教授目前已经在国外学术杂志与国际会议上发表论文二十几篇,在国内学术期刊上发表论文30多篇,发表中文专著1本,为近10个国际英文学术期刊提供论文评阅服务。
-
主页访问
3594
-
关注数
0
-
成果阅读
495
-
成果数
11
【期刊论文】A global calibration method for large-scale multi-sensor visual measurement systems
卢荣胜, R.S. Lu, Y.F. Li
R. S. Lu, Y. E. Li. Sensors and Actuators A 116 (2004) 384-393,-0001,():
-1年11月30日
Each sensor in a multi-sensor visual measurement system has its own local coordinate system to which its measurements are referred. To use the measurement results, the data need to be transformed into a global coordination system. This indicates that all of the local sensor systems relative to the global coordinate system need to be calibrated by a global calibration method. In this paper, a method for calibrating the coordinate systems of a large-scale multi-sensor visual measurement system is introduced. The method utilizes a theodolite coordinate measurement system based on a theodolite pair to realize the global calibration. During the global calibration process, the theodolite coordinate measurement system measures the 3D coordinates of the feature points within each visual sensor relative to a global coordinate system. Then the global calibration can be implemented by means of direct and indirect transformation methods depending on the calibration targets. The calibration method has been successfully applied in practical applications.
Visual measurement, Multi-sensor system, Global calibration, Theodolite
-
121浏览
-
0点赞
-
0收藏
-
0分享
-
211下载
-
0评论
-
引用
【期刊论文】Calibration of a 3D vision system using pattern projection
卢荣胜, R.S.Lu, Y.F.Li
R. S. Lu, Y. F. Li. Sensors and Actuators A 104 (2003) 94-102,-0001,():
-1年11月30日
In this paper, we describe a calibration method for 3D vision system using pattern projection.The calibration consists of two phases: offline calibration of the parameters of the pattern projector and on-line calibration of the varying intrinsic and extrinsic parameters of the camera. During the on-line recalibration, we do not need to calibrate the homographies of all the light stripe planes relative to the camera, but just need to calibrate those of the two or more arbitrary light planes. Then all of the other light stripe planes homographies relative to the camera image plane can be recovered based on the relation derived in this paper between the homographies of the light stripe planes and their transformations with respect to the world coordinate frame. By this method, we can easily implement recalibration of the 3D vision system with its pattern projection when the intrinsic and extrinsic parameters of the camera are changed.
3D vision, Recalibration, Pattern projection, Homography
-
38浏览
-
0点赞
-
0收藏
-
0分享
-
155下载
-
0评论
-
引用
【期刊论文】Geometrical information extraction from laser speckle pattern images using texture analysis
卢荣胜, Rong-Sheng Lu
Proc. Of SPIE vol. 6280,-0001,():
-1年11月30日
In this paper, the statistical properties of speckle pattern are investigated from the point of view of computer texture analysis, and a measurement method of an object surface roughness and the object surface displacement is subsequently put forward. In the geometrical information extraction technique, the speckle pattern images are taken by a very simple configuration of setup consisting of a laser and a CCD camera. Surface roughness and displacement information is extracted based on the energy feature characterization of the grey level co-occurrence matrices of the speckle pattern images. Our experimental results show that surface roughness and displacement contained in surface speckle pattern images have a good relationship with their energy feature. By means of a set of standard surface specimens with different roughness, the relation curve is readily calibrated. Then the surface roughness of an object surface made by same material and manufactured by the same way as the standard specimens can be evaluated from a single speckle pattern image taken from the surface. Similarly, the surface displacement can also be obtained from a single speckle pattern image. The easily implemented method can be used in-process surface roughness and displacement measurement.
Surface roughness, speckle pattern, texture analysis, grey level co-occurrence matrix
-
33浏览
-
0点赞
-
0收藏
-
0分享
-
447下载
-
0评论
-
引用
卢荣胜, Rong-Sheng Lu, Gui-Yun Tian, Duke Gledhill, Steve Ward
10 December 2006/Vol. 45, No. 35, APPLIED OPTICS,-0001,():
-1年11月30日
Surface speckle pattern intensity distribution resulting from laser light scattering from a rough surface contains various information about the surface geometrical and physical properties. A surface roughness measurement technique based on the texture analysis of surface speckle pattern texture images is put forward. In the surface roughness measurement technique, the speckle pattern texture images are taken by a simple setup configuration consisting of a laser and a CCD camera. Our experimental results show that the surface roughness contained in the surface speckle pattern texture images has a good monotonic relationship with their energy feature of the gray-level co-occurrence matrices. After the measurement system is calibrated by a standard surface roughness specimen, the surface roughness of the object surface composed of the same material and machined by the same method as the standard specimen surface can be evaluated from a single speckle pattern texture image. The robustness of the characterization of speckle pattern texture for surface roughness is also discussed. Thus the surface roughness measurement technique can be used for an in-process surface measurement.
-
0浏览
-
0点赞
-
0收藏
-
0分享
-
171下载
-
0评论
-
引用
【期刊论文】Hybrid vision system for online measurement of surface roughness
卢荣胜, Gui Yun Tian, Rong-Sheng Lu
G. Y. tian and R. -S. Lu J. Opt. Soc. Am. A/Vol. 23, No. 12/December 2006,-0001,():
-1年11月30日
A hybrid vision system for online measurement of surface roughness is introduced. The hybrid vision system applies two cameras for capturing the laser speckle pattern and scattering images simultaneously. With the help of advanced image processing, several features of texture and shape are computed for the surface roughness characterization. On the basis of experimental tests, feature fusion to improve measurement range and linearization of the measurement is also discussed.
-
40浏览
-
0点赞
-
0收藏
-
0分享
-
316下载
-
0评论
-
引用
【期刊论文】Global Calibration of Sensor External Parameters in Large-Scale Machine Vision Systems
卢荣胜, R. S. Lu, Y. F. Li
8th IEEE Conference on Mechatinics and Machine Vision in Praclice Hong Kong 2001,-0001,():
-1年11月30日
Each sensor in a large-scale machine vision system has its own local coordinate system to which its measurements are referred. To use the measurement results, the data need to be transformed into a global coordination system's. This dictates that all of the local sensor systems relative to the global coordinate system need to be calibrated by a global calibration method. In this paper, a global calibration method for determining the relationship between each sensor coordinate system and the global coordinate system in a large-scale machine vision system is introduced. Two coordinate transformation methods corresponding to the global calibration method, direct and indirect transformation methods, are developed. The global calibration method is very useful and has been successfully used in many practical applications, and very good results have been achieved, as observed from the experimental results in the end of the paper.
global calibration, theodolite coordinate system calibration target,, large-scale machine vision system.,
-
46浏览
-
0点赞
-
0收藏
-
0分享
-
61下载
-
0评论
-
引用
【期刊论文】On-line measurement of surface roughness by laser light scattering
卢荣胜, Rong-Sheng Lu , Gui Yun Tian
Institute of Physics Publishing Measurement Science and Technology Meas. Sci. Technol. 17 (2006) 1496-1502,-0001,():
-1年11月30日
On-line roughness measurement of a surface with one-dimensional manufacturing marks is difficult to implement. For example, a contact stylus-type inspection method often does not perform very well or fails without any prior knowledge of the mark distribution on the surface. In this paper, we propose an on-line surface roughness measurement method based on laser light scattering, which is very effective for roughness measurement of one-dimensional manufacturing surfaces. The surface roughness is obtained from the spatial distribution of the scattered light intensity. The measurement setup has a very simple configuration, which consists of a CCD sensor, a collimated diode laser and an expander. The orientation of the spatial distribution of the scattered light intensity from the surface, which depends on the surface orientation, is detected by the CCD sensor, and then the mark direction can be readily determined from image processing. After that the root-mean-square (RMS) height of the surface roughness is extracted by means of image processing of the scattered light distribution in the direction parallel to the manufacturing mark, rather than in the direction perpendicular to the mark which is often followed by other measurement probes. The experimental tests show that the non-contact method has great potential for on-line surface roughness measurement.
on-line measurement,, surface roughness,, light scattering,, one-dimensional manufacturing surface
-
35浏览
-
0点赞
-
0收藏
-
0分享
-
313下载
-
0评论
-
引用
【期刊论文】On-line Measurement of the Straightness of Seamless Steel Pipes Using Machine Vision Technique
卢荣胜, R.S.Lu, Y.F.Li, Q.Yu
R. S. Lu et al. Sensors and Actuators A 94 (2001) 95-101,-0001,():
-1年11月30日
In this paper, on-line and real-time laser visual alignment measurement technique is studied to measure the spatial straightness of large objects. The basic principle of the visual alignment measurement is detailed. The mathematics models of visual sensor, measurement system and their calibrations are presented. Based on the technique, an experiment system is developed and the straightness of a 1500 mm long seamless steel pipe is inspected. The experiment results show that the measurement technique can achieve total on-line measurement and it offers high precision and stability, which is of practical importance for the application.
Visual alignment, Straightness, On-line measurement, Calibration
-
48浏览
-
0点赞
-
0收藏
-
0分享
-
67下载
-
0评论
-
引用
【期刊论文】Surface measurement using active vision and light scattering
卢荣胜, Gui Yun Tian, Rong Sheng Lu, Duke Gledhil
G. Y. Tian et al. Optics and Lasers in Engineering 45 (2007) 131-139,-0001,():
-1年11月30日
This paper reviews the recent progress in surface measurement methods using active vision and light-scattering techniques. The active vision methods with different structured light patterns and the corresponding techniques are summarized. The surface roughness and defects inspection with light-scattering are discussed. After the review, an integrative method to measure surface waviness and form, roughness is proposed.
Surface measurement, Active vision, Light scattering, Speckle pattern
-
57浏览
-
0点赞
-
0收藏
-
0分享
-
302下载
-
0评论
-
引用
【期刊论文】Surface topology from multi-angular reflectivity
卢荣胜, A.K.Forrest, R.S.Lu
Proc. Of SPIE Vol. 6280,-0001,():
-1年11月30日
A surface scanner has been developed which records the light from an approximately flat surface at up to sixteen different angles. The scanner simultaneously records images of the surface as an illuminated spot is traversed across the surface. The optical design of the scanner allows the use of just one parabolic mirror slightly larger than the scan length required, and small detectors for the reflected/scattered light at each angle. Design principles for the scanner are developed and some resulting images on surfaces presented. The data from the above scanner is used to compute the surface topology of a surface by integrating the surface slope measurements obtained from the multi-angle data. This is accomplished by obtaining an estimation of surface slope at each pixel position. Constraints are then imposed on the data to obtain a continuous three-dimensional surface. The surface obtained is compared with data obtained from the surface by measuring with a “Talysurf” stylus measurement machine. To do this a common coordinate frame is needed requiring a rotation and scaling in two directions of one of the data sets to obtain maximum cross-correlation between the three dimensional profiles.
Scanner, surface measurement, profile, reflectance, texture, roughness
-
33浏览
-
0点赞
-
0收藏
-
0分享
-
111下载
-
0评论
-
引用