High-accuracy asteroid 3D modelling method based on stereo images and laser altimetry data

IF 5 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology Pub Date : 2025-07-11 DOI:10.1016/j.optlastec.2025.113501

Shuo Zhang, Yichen Yang, Bo Hu, Yuzhan Han, Youqing Ma, Shaochuang Liu

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引用次数: 0

Abstract

Asteroid 3D modelling is of great significance for asteroid exploration mission. Asteroid 3D modelling method based on the combined adjustment of stereo images and laser altimetry data is proposed. The methodological novelty is: (1) 3D modeling pipeline for asteroids is proposed, include: laser footprint positioning, laser point image coordinate extraction, combined adjustment and PMVS (Patch based Multi View Stereo). (2) combined adjustment model integrating stereo image and laser altimeter data has been established. The boresight misalignment and the eccentric distance of the main camera, the laser altimeter pointing angle, are added as additional parameters for improved accuracy. The accuracy and effectiveness are verified by simulated experiment. Through verification, the highest RMS (Root Mean Square) of laser point positioning is 0.85 mm, and the lowest RMS is 35.18 mm. The checkpoints RMS for 3D modelling, the highest is 4.55 mm and the lowest is 11.66 mm. Through the linear fitting analysis, it is determined that the modeling accuracy is 0.16 m at a photography distance of 500 m and 0.31 m at a photography distance of 1000 m. Through calculation, the Pearson correlation coefficient reaches 0.97. This shows that the proposed model has a high correlation with the original model.

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基于立体图像和激光测高数据的高精度小行星三维建模方法

小行星三维建模对小行星探测任务具有重要意义。提出了基于立体影像和激光测高数据联合平差的小行星三维建模方法。方法新颖之处：(1)提出了小行星三维建模流水线，包括：激光足迹定位、激光点图像坐标提取、组合平差和基于Patch的多视点立体成像（PMVS）。(2)建立了立体图像与激光高度计数据相结合的组合平差模型。为了提高精度，增加了主摄像机的轴向偏差和偏心距离、激光测高仪指向角等参数。仿真实验验证了该方法的准确性和有效性。经验证，激光点定位的最高均方根（RMS）为0.85 mm，最低均方根（RMS）为35.18 mm。三维建模的检查点均方根值最高为4.55 mm，最低为11.66 mm。通过线性拟合分析，确定在拍摄距离为500 m时建模精度为0.16 m，在拍摄距离为1000 m时建模精度为0.31 m。经计算，Pearson相关系数达到0.97。这表明本文提出的模型与原模型具有较高的相关性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Optics and Laser Technology 物理-光学

CiteScore

8.50

自引率

10.00%

发文量

1060

审稿时长

3.4 months

期刊介绍： Optics & Laser Technology aims to provide a vehicle for the publication of a broad range of high quality research and review papers in those fields of scientific and engineering research appertaining to the development and application of the technology of optics and lasers. Papers describing original work in these areas are submitted to rigorous refereeing prior to acceptance for publication. The scope of Optics & Laser Technology encompasses, but is not restricted to, the following areas: •development in all types of lasers •developments in optoelectronic devices and photonics •developments in new photonics and optical concepts •developments in conventional optics, optical instruments and components •techniques of optical metrology, including interferometry and optical fibre sensors •LIDAR and other non-contact optical measurement techniques, including optical methods in heat and fluid flow •applications of lasers to materials processing, optical NDT display (including holography) and optical communication •research and development in the field of laser safety including studies of hazards resulting from the applications of lasers (laser safety, hazards of laser fume) •developments in optical computing and optical information processing •developments in new optical materials •developments in new optical characterization methods and techniques •developments in quantum optics •developments in light assisted micro and nanofabrication methods and techniques •developments in nanophotonics and biophotonics •developments in imaging processing and systems