中国科学院机构知识库网格系统: 检索

On-orbit calibration of space camera lens distortion using a single image 期刊论文 OAI收割
OPTICS AND LASERS IN ENGINEERING, 2024, 卷号: 177
作者: Zhang, Gaopeng; Wang, Feng; Zhang, Guangdong; Zhang, Zhe; Du, Hubing

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收藏 | 浏览/下载：17/0 | 提交时间：2024/08/13

Machine vision Camera calibration Lens distortion Vanishing points Space camera

Precise Geometric Correction and Robust Mosaicking for Airborne Lightweight Optical Butting Infrared Imaging System 期刊论文 OAI收割
Ieee Access, 2019, 卷号: 7, 页码: 93569-93579
作者: F.L.Wu; H.N.Guan; D.J.Yan; Z.Wang; D.Wang

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收藏 | 浏览/下载：31/0 | 提交时间：2020/08/24

Image mosaicking,non-linear distortion correction,trapezoidal,distortion correction,UAVs,lens distortion,model,segmentation,calibration,rover,Computer Science,Engineering,Telecommunications

Robust Line-Based Radial Distortion Estimation From a Single Image 期刊论文 OAI收割
Ieee Access, 2019, 卷号: 7, 页码: 180373-180382
作者: L.W.Zhang; H.B.Shang; F.L.Wu; R.Wang; T.Sun

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收藏 | 浏览/下载：18/0 | 提交时间：2020/08/24

Distortion estimation,radial distortion,division model,feature,selection,plumb-line,lens distortion,automatic calibration,cameras,model,Computer Science,Engineering,Telecommunications

A single-image linear calibration method for camera 期刊论文 OAI收割
MEASUREMENT, 2018, 卷号: 130, 页码: 298-305
作者: Zhang, Zhuang; Zhao, Rujin; Liu, Enhai; Yan, Kun; Ma, Yuebo

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收藏 | 浏览/下载：34/0 | 提交时间：2019/08/23

Camera calibration Lens distortion correction Division model Non-iterative

基于附加参数光束法平差的非量测型数码相机检校研究/Calibration of a Nonmetric Camera Based on Bundle Adjustment with Additional Parameters[J] 期刊论文 OAI收割
遥感信息, 2014, 卷号: 29, 期号: 3, 页码: 14-18
作者: 曹良中; 杨辽; 李欣; 张伟阁; 贾洋

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收藏 | 浏览/下载：25/0 | 提交时间：2017/12/29

附加参数光束法平差非量测型数码相机室内三维检校场光学畸变差内方位元素 Bundle Adjustment With Additional Parameters Nonmetric Camera Three-dimensional Indoor Calibration Field Lens Optical Distortion Element Of Interior Orientation

Design and simulation of CMOS star sensor lens with large relative aperture and wide field (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Electronic and Mechanical Engineering and Information Technology, EMEIT 2011, August 12, 2011 - August 14, 2011, Harbin, China
Zhong X.; Jin G.

收藏 | 浏览/下载：60/0 | 提交时间：2013/03/25

A 50mm focal length F/1.25 Gaussian type optical system is designed in this paper which has 20field of view. Actual star image adding optical cross-talk effect of CMOS(Complementary Metal Oxide Semiconductor) detector is simulated by non-sequential ray tracing in ZEMAX optical design and analysis software to evaluate its performance. The distortion relative to image spot centriod is introduced and calculated by simulated star images which is less than 0.03% of lens in this paper. Thermal adaptability is discussed by opt-mechanic thermal analysis which shows the RMS spot radius of marginal filed changes less than 0.7m under 10C temperature gradient and changes less than 1m during homogeneous temperature changing from 40C to 40C. The results of analyses and simulations show the design of this lens can achieve the requirement of high precision CMOS star sensor well. 2011 IEEE.

The research on distortion measurement and compensation technology in photoelectricity measurement system (EI CONFERENCE) 会议论文 OAI收割
2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China
Hong F.; Mujun X.; Zhiqian W.

收藏 | 浏览/下载：22/0 | 提交时间：2013/03/25

The distortion made by optical lens largely affect the measurement accuracy of the large field of view photoelectricity measurement system according to the theory of aberration in the photoelectricity system this paper design a series of distortion measurement devices in connection with the process of distortion correction in photoelectricity system establish the related mathmatics model make the real time distortion correction by the method of software compensation. The experimental results demonstrate the method decrease the measurement error made by the photoelectricity system distortion after the compensation in tatal field of view the systematic measurement error is less than 0.5 picture element. 2010 IEEE.

Research on automatic Hartmann test of membrane mirror (EI CONFERENCE) 会议论文 OAI收割
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, April 26, 2010 - April 29, 2010, Dalian, China
作者: Zhang P.

收藏 | 浏览/下载：31/0 | 提交时间：2013/03/25

Electrostatic membrane mirror is ultra-lightweight and easy to acquire a large diameter comparing with traditional optical elements so its development and usage is the trend of future large mirrors. In order to research the control method of the static stretching membrane mirror the surface configuration must be tested. However membrane mirror's shape is always changed by variable voltages on the electrodes and the optical properties of membrane materials using in our experiment are poor so it is difficult to test membrane mirror by interferometer and null compensator method. To solve this problem an automatic optical test procedure for membrane mirror is designed based on Hartmann screen method. The optical path includes point light source CCD camera splitter and diffuse transmittance screen. The spots' positions on the diffuse transmittance screen are pictured by CCD camera connected with computer and image segmentation and centroid solving is auto processed. The CCD camera's lens distortion is measured and fixing coefficients are given to eliminate the spots' positions recording error caused by lens distortion. To process the low sampling Hartmann test results Zernike polynomial fitting method is applied to smooth the wave front. So low frequency error of the membrane mirror can be measured then. Errors affecting the test accuracy are also analyzed in this paper. The method proposed in this paper provides a reference for surface shape detection in membrane mirror research. 2010 Copyright SPIE - The International Society for Optical Engineering.

Design of optical lens for space tridimensional mapping camera (EI CONFERENCE) 会议论文 OAI收割
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, November 19, 2008 - November 21, 2008, Chengdu, China
作者: Wang Z.; Wang Z.; Zhang L.-P.

收藏 | 浏览/下载：26/0 | 提交时间：2013/03/25

Three-linear array tridimensional mapping camera consists of three independent linear CCD cameras. Unique position must be kept among the three linear CCD cameras. Optical lens is one of pivotal parts MTF the ground resolution power is 5m resolving power the distortion is 3/10000. They meet the need of user. 2009 SPIE. distortion are its important techno-items. The optical lens of space tridimensional mapping camera is the key to accomplish the tridimensional mapping mission. In order to meet the need of user a design on optical lens of transmission semi-telecentric beam path in image space is expounded and assembly method based on DFT(Design For Test) of single lens suit and whole optical lens are expounded. The test results indicates that the MTF of optical lens referred in the paper is 0.45(@77lp/mm)

A method for calibrating camera lens distortion with cross-ratio invariability in welding seam system 会议论文 OAI收割
1st International Conference Intelligent Robotics and Applications, Wuhan, PEOPLES R CHINA, OCT 15-17, 2008
作者: Zhao, Guangtao; Qiao, Hong

收藏 | 浏览/下载：11/0 | 提交时间：2017/01/12

camera calibration radial distortion decentering distortion cross-ratio invariability wide-angle lens