Space target laser radar scattering cross section simulation method, device, equipment and medium

By projecting the triangular facets of a spatial target onto a pixel plane and selecting the pixel with the smallest depth value as the visible pixel, the problem of inaccurate judgment of complex spatial target occlusion in the prior art is solved, and more accurate simulation of lidar scattering cross section is achieved.

CN122174575AActive Publication Date: 2026-06-09齐鲁空天信息研究院
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
齐鲁空天信息研究院
Filing Date
2026-05-08
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing methods for determining surface occlusion of space targets based on depth of surface elements are difficult to apply to complex space targets, resulting in low accuracy of lidar scattering cross-section simulation.

Method used

The triangular facets of the spatial target are projected onto a pixel plane perpendicular to the incident wave of the lidar. By calculating the depth value and relative position of each pixel, the pixel with the smallest depth value is selected as the visible pixel, and the scattering cross section is calculated based on the backscattering effect of the visible facets.

Benefits of technology

It improves the accuracy of reflecting the occlusion relationship of surface elements on the outer surface of complex space targets, and obtains more accurate simulation results of lidar scattering cross section.

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Abstract

This application relates to the field of lidar detection, specifically to a method, apparatus, device, and medium for simulating the lidar scattering cross section of a space target. The method includes: projecting triangular facets onto a pixel plane perpendicular to the incident wave to obtain projected facets with depth attributes; using pixels within the projected facets' bounding rectangle as area pixels, and calculating a weighted average of the depth values ​​of three vertex pixels based on the relative positions of the area pixels within the projected facets to obtain the depth value of the area pixels; selecting the area pixel with the smallest depth value from at least one area pixel corresponding to any pixel in the pixel plane as a visible pixel, and designating projected facets where the ratio of visible pixels to area pixels exceeds a preset visibility threshold as visible facets; and calculating the lidar scattering cross section based on the visible facets. By performing pixel-level depth testing on the facets to identify visible pixels and determine the visible facets, an accurate lidar scattering cross section can be obtained.
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