不同位置强光源作用微光电视系统成像特征建模及分析

发布时间：2018-11-24 10:40

【摘要】：以强光源作用微光电视成像机理为基础,借助端到端成像建模思想,综合考虑强光源作用目标表面辐射特性及系统自动亮度控制特性,建立了不同位置强光作用后系统成像特征量化模型.以模型为基础,利用三维场景仿真平台实时计算强光源作用后地物成像灰度,实现了不同位置微光系统成像数字仿真.结合外场实验数据,通过对比实验结果与仿真结果中目标和背景灰度及目标成像对比度,对仿真模型进行了验证,结果表明:该模型与外场实验数据有较好的一致性,模型可靠性较高.最后探讨了强光作用后不同干扰因素对系统成像质量的影响,当强光源位于系统视场外时,其对目标表面辐射特性的作用是影响系统输出图像质量的主要因素;当强光源位于系统视场内时,其对系统增益的作用则成为主要因素.
[Abstract]:Based on the imaging mechanism of LLL TV with strong light source, and with the help of the idea of end-to-end imaging modeling, the radiation characteristics of the target surface and the automatic luminance control characteristics of the system are considered synthetically. A quantization model of the imaging characteristics of the system under the action of strong light at different positions is established. Based on the model, the 3D scene simulation platform is used to calculate the image grayscale of ground object after the action of strong light source in real time, and the imaging digital simulation of low light level system in different position is realized. The simulation model is verified by comparing the experimental results with the simulation results, the gray level of the target and the background and the contrast of the target imaging. The results show that the model is in good agreement with the experimental data in the field. The reliability of the model is high. Finally, the influence of different interference factors on the imaging quality of the system is discussed. When the strong light source is located outside the system field, the effect of the strong light source on the radiation characteristics of the target surface is the main factor that affects the image quality of the system output. When the strong light source is in the field of view, its effect on the system gain becomes the main factor.
【作者单位】：西安电子科技大学物理与光电工程学院;中国人民解放军63870部队;
【基金】：国家自然科学基金项目(No.61007014) 航空科学基金(No.2010181004)资助
【分类号】：TN949.14

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