Research on elaborate image simulation method for close-range space target

IF 1.2 4区物理与天体物理 Q4 OPTICS

Journal of Modern Optics Pub Date : 2023-02-23 DOI:10.1080/09500340.2023.2219776

Hao Wang, Qianhao Ning, Zhiqiang Yan, Xiang Liu, Yinxi Lu

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引用次数: 1

Abstract

In order to meet the urgent needs of target image data in the testing of close-range space target situational awareness algorithm, an elaborate image simulation method that fully considers the target surface texture structure is proposed. First, the physical mechanism is analysed by constructing a radiation transmission model. Then, Phong and five-parameters BRDF models are adopted to characterize the optical properties of the material. The geometric characteristic of texture structure is also characterized through displacement mapping. Finally, the sequence images of the space target are obtained by simulation based on the designed simulation process and given imaging conditions. The CPU multi-core parallel acceleration based on the Embree engine is taken to compensate for the speed reduction caused by the increase in the number of model faces. Compared with the measured image in orbit for verification, the image simulation similarity is above 80%. The results show that the simulation method in this article can better describe the characteristics of the target in the actual on-orbit environment and meet the near real-time simulation requirements of the system, providing a more realistic image data source for the ground test of the on-orbit service technology.

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近距离空间目标精细图像仿真方法研究

为了满足近距离空间目标态势感知算法测试中对目标图像数据的迫切需求，提出了一种充分考虑目标表面纹理结构的精细图像仿真方法。首先，通过建立辐射传输模型，分析了辐射传输的物理机制。然后，采用Phong和五参数BRDF模型来表征材料的光学性能。纹理结构的几何特征也通过位移映射来表征。最后，在设计的仿真过程和给定的成像条件下，通过仿真获得了空间目标的序列图像。采用基于Embree引擎的CPU多核并行加速来补偿模型面数量增加导致的速度下降。与在轨验证的实测图像相比，图像模拟相似度在80%以上。结果表明，本文的仿真方法能够更好地描述目标在实际在轨环境中的特性，满足系统的近实时仿真要求，为在轨服务技术的地面测试提供了更真实的图像数据源。

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

Journal of Modern Optics 物理-光学

CiteScore

2.90

自引率

0.00%

发文量

审稿时长

2.6 months

期刊介绍： The journal (under its former title Optica Acta) was founded in 1953 - some years before the advent of the laser - as an international journal of optics. Since then optical research has changed greatly; fresh areas of inquiry have been explored, different techniques have been employed and the range of application has greatly increased. The journal has continued to reflect these advances as part of its steadily widening scope. Journal of Modern Optics aims to publish original and timely contributions to optical knowledge from educational institutions, government establishments and industrial R&D groups world-wide. The whole field of classical and quantum optics is covered. Papers may deal with the applications of fundamentals of modern optics, considering both experimental and theoretical aspects of contemporary research. In addition to regular papers, there are topical and tutorial reviews, and special issues on highlighted areas. All manuscript submissions are subject to initial appraisal by the Editor, and, if found suitable for further consideration, to peer review by independent, anonymous expert referees. General topics covered include: • Optical and photonic materials (inc. metamaterials) • Plasmonics and nanophotonics • Quantum optics (inc. quantum information) • Optical instrumentation and technology (inc. detectors, metrology, sensors, lasers) • Coherence, propagation, polarization and manipulation (classical optics) • Scattering and holography (diffractive optics) • Optical fibres and optical communications (inc. integrated optics, amplifiers) • Vision science and applications • Medical and biomedical optics • Nonlinear and ultrafast optics (inc. harmonic generation, multiphoton spectroscopy) • Imaging and Image processing