Research on method of real-time target image generation under multi-light source illumination
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摘要: 由于地理位置、太阳、大气环境等因素限制，无法获取空间目标在各种姿态、光照条件、特别是激光、太阳和背景光共同作用下的实际成像。提出一种多光源照射下目标图像实时生成方法。该方法基于计算机图形学中纹理映射思想，采用现代图形显卡编程技术和帧缓存对象特性，在GPU（Graphics Processing Unit）端采用着色器语言实现多光源作用下目标亮度值高效计算和真实感增强；采用开源三维图形引擎OSG（Open Scene Graph）支持多种格式三维模型文件，提高与国产麒麟操作系统及常用战场态势显示软件的兼容性。仿真实验验证了该方法的有效性和优越性。Abstract: Impacted by various factors such as geographical position, sun and atmospheric environment, it is impossible to obtain the real images of space targets under various postures and illumination conditions, let alone under the interaction between laser, sun and background light. In this paper, a real-time target image generation method under multi-light source irradiation is proposed. This method is based on the modern graphics card programming technique and frame caching object advantages. At the GPU (Graphics Processing Unit) side, shader language is used to efficiently calculate target brightness values and enhance realism under the influence of multi-light source. The open-source 3D graphics engine named OSG (Open Scene Graph) helps support 3D model files of various formats and improve the compatibility with the domestic Kirin operating system as well as common battlefield situation display software. Simulation experiments demonstrate the effectiveness and superiority of the proposed method.
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图 1 多光源照射下目标图像生成流程图
Figure 1. Flowchart of target image generation under multi-light source illumination
图 3 CPU端渲染激光光照数据到纹理流程图
Figure 3. Flowchart of CPU-side rendering of laser illumination data to texture
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