no code implementations • 18 Apr 2024 • Chuanhao Xu, Jingwei Cheng, Fu Zhang
In this paper, we introduce P-NAL, an entity alignment method that captures two types of logical inference paths with Non-Axiomatic Logic (NAL).
no code implementations • 29 Apr 2023 • Zheng Liu, Fu Zhang
However, the accuracy and speed of LiDAR bundle adjustment depend on the quality of plane extraction, which provides point association for LiDAR BA.
1 code implementation • 12 Jan 2023 • Jiarong Lin, Chongjiang Yuan, Yixi Cai, Haotian Li, Yunfan Ren, Yuying Zou, Xiaoping Hong, Fu Zhang
This voxel-wise meshing operation is delicately designed for the purpose of efficiency; it first performs a dimension reduction by projecting 3D points to a 2D local plane contained in the voxel, and then executes the meshing operation with pull, commit and push steps for incremental reconstruction of triangle facets.
1 code implementation • 26 Sep 2022 • Chongjian Yuan, Jiarong Lin, Zuhao Zou, Xiaoping Hong, Fu Zhang
For a triangle, its shape is uniquely determined by the length of the sides or included angles.
1 code implementation • 8 Sep 2022 • Jiarong Lin, Fu Zhang
The LIO subsystem utilizes the measurements from a LiDAR for reconstructing the geometric structure (i. e., the positions of 3D points), while the VIO subsystem simultaneously recovers the radiance information of the geometric structure from the input images.
3 code implementations • 10 Sep 2021 • Jiarong Lin, Fu Zhang
Moreover, to make R3LIVE more extensible, we develop a series of offline utilities for reconstructing and texturing meshes, which further minimizes the gap between R3LIVE and various of 3D applications such as simulators, video games and etc (see our demos video).
1 code implementation • 24 Feb 2021 • Jiarong Lin, Chunran Zheng, Wei Xu, Fu Zhang
Our proposed framework is composed of two parts: the filter-based odometry and factor graph optimization.
Robotics
3 code implementations • 16 Oct 2020 • Wei Xu, Fu Zhang
To lower the computation load in the presence of large number of measurements, we present a new formula to compute the Kalman gain.
Robotics
1 code implementation • 16 Oct 2020 • Zheng Liu, Fu Zhang
We propose a framework for bundle adjustment (BA) on sparse lidar points and incorporate it to a lidar odometry and mapping (LOAM) to lower the drift.
Robotics
no code implementations • 12 Oct 2020 • Wei Xu, Dongjiao He, Yixi Cai, Fu Zhang
It is shown that this new paradigm is much simpler and more natural than existing methods based on quaternion parameterizations.
1 code implementation • 3 Jul 2020 • Jiarong Lin, Xiyuan Liu, Fu Zhang
To improve the system robustness and performance in self-localization and mapping, we develop a decentralized framework for simultaneous calibration, localization and mapping with multiple LiDARs.
Robotics
no code implementations • 10 Jun 2020 • Filip Ilievski, Pedro Szekely, Jingwei Cheng, Fu Zhang, Ehsan Qasemi
Commonsense reasoning is an important aspect of building robust AI systems and is receiving significant attention in the natural language understanding, computer vision, and knowledge graphs communities.
2 code implementations • 25 Sep 2019 • Jiarong Lin, Fu Zhang
This paper presents a loop closure method to correct the long-term drift in LiDAR odometry and mapping (LOAM).
2 code implementations • 15 Sep 2019 • Jiarong Lin, Fu Zhang
LiDAR odometry and mapping (LOAM) has been playing an important role in autonomous vehicles, due to its ability to simultaneously localize the robot's pose and build high-precision, high-resolution maps of the surrounding environment.
no code implementations • 6 Jun 2019 • Wei Xu, Haowei Gu, Fu Zhang
Both the feedback controller and the iterative learning feed-forward controller are based on the aircraft acceleration model, which is directly measurable by the onboard accelerometer.
Systems and Control
1 code implementation • 21 Mar 2019 • Jiarong Lin, Luqi Wang, Fei Gao, Shaojie Shen, Fu Zhang
To this end, we propose an end-to-end policy network, which imitates from the traditional pipeline and is fine-tuned using reinforcement learning.
Robotics
no code implementations • 21 Sep 2016 • Nian Cai, Zhineng Lin, Fu Zhang, Guandong Cen, Han Wang
Finally, the facial landmarks in the current frame are exactly detected from the validated face bounding box via the landmark detector.