中国科学院机构知识库网格系统: 检索

Monocular Visual-Inertial and Robotic-Arm Calibration in a Unifying Framework 期刊论文 OAI收割
IEEE/CAA Journal of Automatica Sinica, 2022, 卷号: 9, 期号: 1, 页码: 146-159
作者: Yinlong Zhang; Wei Liang; Mingze Yuan; Hongsheng He; Jindong Tan

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收藏 | 浏览/下载：61/0 | 提交时间：2021/11/03

Calibration inertial measurement unit (IMU) monocular camera robotic arm spiral moving trajectory

Monocular Visual-Inertial and Robotic-Arm Calibration in a Unifying Framework 期刊论文 OAI收割
IEEE-CAA JOURNAL OF AUTOMATICA SINICA, 2022, 卷号: 9, 期号: 1, 页码: 146-159
作者: Zhang YL(张吟龙); Liang W(梁炜); Yuan MZ(苑明哲); He, Hongsheng; Tan JD(谈金东)

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收藏 | 浏览/下载：54/0 | 提交时间：2021/11/08

calibration inertial measurement unit (IMU) monocular camera robotic arm spiral moving trajectory

Real-time human segmentation by BowtieNet and a SLAM-based human AR system 期刊论文 OAI收割
Virtual Reality & Intelligent Hardware, 2019, 卷号: 1, 期号: 5, 页码: 511—524
作者: Zhao,Xiaomei; Tang,Fulin; Wu,Yihong

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收藏 | 浏览/下载：36/0 | 提交时间：2020/05/07

Augmented Reality Moving Object Human Segmentation Reconstruction And Tracking Camera Pose Human segmentation

PTZ摄像机下的交通场景异常事件检测 学位论文 OAI收割
工学硕士, 中国科学院自动化研究所: 中国科学院研究生院, 2012
张玉双

收藏 | 浏览/下载：75/0 | 提交时间：2015/09/02

交通异常事件 PTZ摄像机背景拼接运动目标检测交通拥堵检测 traffic abnormal event PTZ camera background mosaic moving object detection traffic congestion

A simple and fast moving object segmentation based on H.264 compressed domain information (EI CONFERENCE) 会议论文 OAI收割
4th International Conference on Computational and Information Sciences, ICCIS 2012, August 17, 2012 - August 19, 2012, Chongqing, China
作者: Chen X.; Chen X.; Chen X.; Sun L.

收藏 | 浏览/下载：20/0 | 提交时间：2013/03/25

The paper presents a simple and fast approach for moving object segmentation based on H.264 compressed domain information for the application of indoor video surveillance with static camera. Due to the characteristics of indoor video surveillance the proposed method of segmentation avoids complicated background model like Gaussian Mixture background model. On the contrary it chooses some simple information like the type of Macroblock etc.. Experimental results of several specific H.264 compressed video sequences demonstrate the good segmentation quality of the proposed approach. 2012 IEEE.

Segmenting moving objects from a freely moving camera with an effective segmentation cue 期刊论文 OAI收割
MEASUREMENT SCIENCE & TECHNOLOGY, 2011, 卷号: 22, 期号: 2
作者: Wu, Mingjun; Peng, Xianrong; Zhang, Qiheng

收藏 | 浏览/下载：35/0 | 提交时间：2015/09/21

moving object segmentation segmentation cue conditional random field moving camera

Study on sub-pixel techniques for accurate image measurement of displacement (EI CONFERENCE) 会议论文 OAI收割
2011 2nd International Conference on Advanced Measurement and Test, AMT 2011, June 24, 2011 - June 26, 2011, Nanchang, China
作者: Zhang X.; Zhang X.; Zhang X.

收藏 | 浏览/下载：22/0 | 提交时间：2013/03/25

The high resolving power camera was often used to improve the precision of measuring system although its price is high because the accuracy of image measure was limited by the pixel resolving ability of camera. A method of one dimension gray level quadrature sub-pixel to detect edge was presented. This method was applied to measure the displacement of measuring head on 3-coordinate measuring machine. The data of test was shown that this system can distinguish displacement 0.001mm. it is higher accuracy than pixel level. So this method is convenient and fast fit to track and measure the moving object. It is obvious that this method can save the cost of hardware.

Design and analysis of auto-focus assembly for spaceborne remote sensing camera (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Electronics, Communications and Control, ICECC 2011, September 9, 2011 - September 11, 2011, Ningbo, China
作者: Chen W.; Gao X.

收藏 | 浏览/下载：33/0 | 提交时间：2013/03/25

Spaceborne remote sensing camera may be out of focus when the environment and photographic distance changes. In order to get higher ground sampled distance for the camera based on the experience gained from the development of a remote sensing camera working principle of auto-focus assembly control system was discussed. Time of waveform extraction was reduced. It sets force an auto-focus assembly that uses cam and line guide rail in order to move the lens group. The motion error of the auto-focus assembly was difficult to be eliminated and would affect on the focusing accuracy of the spaceborne remote sensing camera directly. So it was analyzed at both ends of the focusing structure. The CCD detector can keep stable when the remote sensing camera is imaging. The motion error was tested to verify the validity of the simulation result and it is less than 0.01mm. Its accuracy meets using demand. The focusing method of moving focal plane is suitable for spaceborne remote sensing camera. 2011 IEEE.

Application of precision harmonic gear drive in focusing mechanism of space camera (EI CONFERENCE) 会议论文 OAI收割
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Smart Structures and Materials in Manufacturing and Testing, April 26, 2010 - April 29, 2010, Dalian, China
作者: Zhang X.; Zhang X.; Zhang X.

收藏 | 浏览/下载：31/0 | 提交时间：2013/03/25

A kind of precision harmonic gear drive in the focusing mechanism of space camera is studied which adopt external meshing complex wave transmission mode. Wave generator is combined with an elliptic cam and a flexible bearing around it. Flexspline is a structure of single wave with the same teeth. The output shaft is supported by a single cross-roller bearing. Ball screws connected the output shaft translate the rotational motion to the linear motion and drive the focusing mirror repeated moving along the linear guide. The output rigid wheel is connected with absolute encoder to detect displacement of focusing movement. It has the characteristics of big transmission ratio high precision compact structure high efficiency and smooth running etc. According to the practical application of this harmonic gear drive in the space camera the location relationship between the displacement of focusing structure and the focal plane movement is derived and the system error is analyzed its accuracy is tested with the open-loop control method. Experimental results show that transmission ratio of the instrument is 1:70 repeated positional accuracy is 2m which meet the requirements for use. 2010 SPIE.

Restoration of an atmospherically blurred image based on physical model fusion approach (EI CONFERENCE) 会议论文 OAI收割
2010 IEEE 10th International Conference on Signal Processing, ICSP2010, October 24, 2010 - October 28, 2010, Beijing, China
作者: Wang Y.; Li J.; Li J.; Li J.; Wang Y.

收藏 | 浏览/下载：29/0 | 提交时间：2013/03/25

This paper proposes a new restoration method only using the single image information combining atmospheric physical model with fusion techniques to reduce the degradation of the image contrast in bad weather conditions caused by atmospheric aerosols such as haze and fog. The basic idea of this method is to utilize physics-based model method instead of multisensors to generate a serial of virtual images and then to fuse those virtual images into a high contrast image based on the wavelet fusion technique. In contrast to previous methods our restoration technique is not only independent on predicted structure distributions of scene reflectance or detailed knowledge about the particular weather condition but also adapt to the situation without a reference image or images with moving objects captured by a video camera. Experiments on different poorcontrast images demonstrate the availability of the proposed method in case of restoring the atmospherically blurred images. 2010 IEEE.