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公开(公告)号：US12118780B2
公开(公告)日：2024-10-15
申请号：US18352246
申请日：2023-07-14
Applicant: GUILIN UNIVERSITY OF TECHNOLOGY
Inventor： Guoqing Zhou , Yue Jiang , Haoyu Wang
CPC classification number: G06V20/176 , G06T7/11 , G06V10/764 , G06V10/7715 , G06V10/806 , G06V10/95 , G06T2207/10028 , G06T2207/20081 , G06T2207/30181
Abstract: The present disclosure relates to a PointEFF method for urban object classification with LiDAR point cloud data, and belongs to the field of LiDAR point cloud classification. The method comprises: point cloud data segmentation; End-to-end feature extraction layer construction; External feature fusion layer construction; and precision evaluation. The PointEFF method for urban object classification with LiDAR point cloud data fuses point cloud hand-crafted descriptors with End-to-end features obtained from a network at an up-sampling stage of a model by constructing an External Feature Fusion module, which improves a problem of local point cloud information loss caused by interpolation operation in the up-sampling process of domain feature pooling methods represented by PointNet and PointNet++, greatly improves classification precision of the model in complex ground features, especially in rough surface ground features, and is capable of being better applied to the classification of urban ground features with complex ground feature types.
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公开(公告)号：US12196885B2
公开(公告)日：2025-01-14
申请号：US18557926
申请日：2023-06-21
Applicant: GUILIN UNIVERSITY OF TECHNOLOGY
Inventor： Guoqing Zhou , Zhexian Liu
Abstract: The present disclosure relates to a stray light suppression device for bathymetric LiDAR onboard unmanned shipborne, belonging to the technical field of LiDAR water depth detection, particularly to a stray light suppression device for bathymetric LiDAR onboard unmanned shipborne. The device comprises an optical system component, a first objective lens barrel, a second objective lens barrel, a spectroscope barrel, a first eyepiece barrel a, a first eyepiece barrel b, a second eyepiece barrel a, a second eyepiece barrel b, a PMT detector a, a PMT detector b and a spectroscope supporting structure. Stray light suppression of an optical system with minimal field-of-view is realized, and stray light propagated by first-order, second-order and third-order scattered light paths is suppressed, so that a water depth detection capability of the bathymetric LiDAR onboard unmanned shipborne is improved and a dynamic detection range is expanded.
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公开(公告)号：US12146987B2
公开(公告)日：2024-11-19
申请号：US17345799
申请日：2021-06-11
Applicant: Guilin University of Technology
Inventor： Guoqing Zhou , Xiang Zhou , Jiasheng Xu
IPC: G01S7/481 , G01S17/32 , G01S17/894 , G01S17/933
Abstract: An airborne super-continuum 50-band hyperspectral light detection and ranging system comprises an integrated control system, a storage unit, a super-continuum laser system, an optical transmitting system, a reflecting mirror, a scanning system, an optical receiving system, a super-continuum hyperspectral laser detection system, a plane array CCD camera. The operation process includes super-continuum laser system emitting continuous hyperspectral pulsed lasers, performing lasers beam expansion and collimation, emitting it to ground objects, reflecting it, receiving it by the scanning system, transmitting to the optical receiving system, and focusing it into hyperspectral laser detection system for outputting laser hyperspectrum and 3D spatial data, storing laser data in the storage unit with high-resolution multi-spectral data. The system acquires hyperspectral spectrum data with 50 bands at aspectral range of 400-900 nm, spectral resolution of 10 nm and 3D spatial data of ground objects with a ground resolution better than 0.5 meters.
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