中国科学院机构知识库网格系统: 检索

A Novel Sparse Geometric 3-D LiDAR Odometry Approach 期刊论文 OAI收割
IEEE SYSTEMS JOURNAL, 2021, 卷号: 15, 期号: 1, 页码: 1390-1400
作者: Liang, Shuang; Cao, Zhiqiang; Guan, Peiyu; Wang, Chengpeng; Yu, Junzhi

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收藏 | 浏览/下载：32/0 | 提交时间：2021/05/06

Laser radar Feature extraction Simultaneous localization and mapping Three-dimensional displays Computational complexity Distance measurement Lighting Line and plane features line-to-line and plane-to-plane associations sparse geometric map 3-D light detection and ranging (LiDAR) odometry

Efficient Center Voting for Object Detection and 6D Pose Estimation in 3D Point Cloud 期刊论文 OAI收割
IEEE TRANSACTIONS ON IMAGE PROCESSING, 2021, 卷号: 30, 页码: 5072-5084
作者: Guo, Jianwei; Xing, Xuejun; Quan, Weize; Yan, Dong-Ming; Gu, Qingyi

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收藏 | 浏览/下载：52/0 | 提交时间：2021/08/15

Three-dimensional displays Pose estimation Shape Object detection Feature extraction Object recognition Transmission line matrix methods 6D pose estimation 3D object recognition point pair features 3D point cloud

Comparison of simulated backgrounds with in-orbit observations for HE, ME, and LE onboard Insight-HXMT 期刊论文 OAI收割
Astrophysics and Space Science, 2020, 卷号: 365, 页码: 158
作者: HXMT

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收藏 | 浏览/下载：53/0 | 提交时间：2022/02/08

Insight-HXMT Geant4 simulation Background observation Astrophysics - Instrumentation and Methods for Astrophysics Abstract: Insight-HXMT, the first X-ray astronomical satellite in China, aims to reveal new sources in the Galaxy and to study fundamental physics of X-ray binaries from 1 to 250 keV. It has three collimated telescopes, the High Energy X-ray telescope (HE), the Medium Energy X-ray telescope (ME), and the Low Energy X-ray telescope (LE). Before the launch, in-orbit backgrounds of these three telescopes had been estimated through Geant4 simulation, in order to investigate the instrument performance and the achievement of scientific goals. In this work, these simulated backgrounds are compared with in-orbit observations. Good agreements are shown for all three telescopes. For HE, (1) the deviation of the simulated background rate after two years of operation in space is 5 % from the observation (2) the total background spectrum and the relative abundance of the 67 keV line show long-term increases both in simulations and observations. For ME, (1) the deviation of simulated background rate is within 15 % from the observation, and (2) there are no obvious long-term increase features in the background spectra of simulations and observations. For LE, the background level given by simulations is also consistent with observations. The consistencies of these comparisons validate that the Insight-HXMT mass model, i.e., space environment components and models adopted, physics processes selected, and detector constructions built, is reasonable. However, the line features at 7.5 and 8.0 keV, which are obvious in the observed spectra of LE, are not evident in simulations. This might result from uncertainties in the LE constructions.

Robust stereo visual odometry based on points and lines 会议论文 OAI收割
Shenyang, China, August 28-30, 2019
作者: Zhang, Jhua

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收藏 | 浏览/下载：23/0 | 提交时间：2020/03/22

visual odometry points and line features SAD adaptive weight model region growth

PL-VIO: Tightly-Coupled Monocular Visual-Inertial Odometry Using Point and Line Features 期刊论文 OAI收割
SENSORS, 2018, 卷号: 18, 期号: 4, 页码: 25
作者: He, Yijia; Zhao, Ji; Guo, Yue; He, Wenhao; Yuan, Kui

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收藏 | 浏览/下载：63/0 | 提交时间：2018/10/10

sensor fusion visual-inertial odometry tightly-coupled point and line features

PL-VIO: Tightly-Coupled Monocular Visual–Inertial Odometry Using Point and Line Features 期刊论文 OAI收割
Sensors, 2018, 卷号: 18, 期号: 4, 页码: 1159
作者: He YiJia(贺一家); Zhao Ji(赵季); Guo Yue(郭跃); He WenHao(何文浩); Yuan Kui(原魁)

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收藏 | 浏览/下载：160/0 | 提交时间：2018/06/04

Sensor Fusion Visual–inertial Odometry Tightly-coupled Point And Line Features

A line mapping based automatic registration algorithm of infrared and visible images 会议论文 OAI收割
5th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Infrared Imaging and Applications, Beijing, June 25-27, 2013
作者: Ai R(艾锐); Shi ZL(史泽林); Xu DJ(徐德江); Zhang CS(张程硕)

收藏 | 浏览/下载：40/0 | 提交时间：2013/12/26

There exist complex gray mapping relationships among infrared and visible images because of the different imaging mechanisms. The difficulty of infrared and visible image registration is to find a reasonable similarity definition. In this paper, we develop a novel image similarity called implicit linesegment similarity(ILS) and a registration algorithm of infrared and visible images based on ILS. Essentially, the algorithm achieves image registration by aligning the corresponding line segment features in two images. First, we extract line segment features and record their coordinate positions in one of the images, and map these line segments into the second image based on the geometric transformation model. Then we iteratively maximize the degree of similarity between the line segment features and correspondence regions in the second image to obtain the model parameters. The advantage of doing this is no need directly measuring the gray similarity between the two images. We adopt a multi-resolution analysis method to calculate the model parameters from coarse to fine on Gaussian scale space. The geometric transformation parameters are finally obtained by the improved Powell algorithm. Comparative experiments demonstrate that the proposed algorithm can effectively achieve the automatic registration for infrared and visible images, and under considerable accuracy it makes a more significant improvement on computational efficiency and anti-noise ability than previously proposed algorithms.

Z-shaped Perspective-Three-Line Problem's Unique Solution Conditions 会议论文 OAI收割
2010 3rd International Conference on Intelligent Networks and Intelligent Systems (ICINIS 2010), Shenyang, China, November 1-3, 2010
作者: Liu C(刘昶); Zhu F(朱枫); Ou JJ(欧锦军); Yu Y(于泳)

收藏 | 浏览/下载：26/0 | 提交时间：2012/06/06

computer vision pose measurement line features perspective-three-line(P3L) problem

The judgment method for the unique solution of real-time pose estimation from particular line correspondences 会议论文 OAI收割
IEEE International Conference on Mechatronics and Automation, Luoyang, China, June 25-28, 2006
作者: Qin LJ(秦丽娟); Zhu F(朱枫)

收藏 | 浏览/下载：16/0 | 提交时间：2012/06/06

line features pose estimation multi-solution phenomenon unique solution

A novel algorithm for real-time pose determination and its iterative method 会议论文 OAI收割
IEEE International Conference on Information Acquisition, Weihai, China, August 20-23, 2006
作者: Qin LJ(秦丽娟); Zhu F(朱枫)

收藏 | 浏览/下载：23/0 | 提交时间：2012/06/06

line features pose geometric constraints step acceleration method