目标表面BRDF对非视距成像的影响

Influence of Target Surface BRDF on Non-Line-of-Sight Imaging

为了研究目标表面材质对非视距成像算法性能的影响,针对不同类型的双向反射分布函数,利用非视距成像领域的共焦扩散层析成像算法对非视距目标进行了仿真重建,最后以玻璃纤维、紫红色漆板、水泥板为实例更深入地探讨不同物体材质对成像质量的影响。对于隐藏目标,仿真结果表明:针对镜面反射率高的目标,重建结果模糊;针对镜面反射率和漫反射率均较高的目标,重建质量不太理想;针对漫反射率高的目标,重建质量较为理想;针对不发生镜面反射的目标,重建结果清晰。在散射特性不同的目标物体中,镜面反射部分占比更小的物体可以较高质量地重建出来。该研究结果为非视距目标领域中目标表面材质的选择提供指导。

In order to investigate the impact of target surface material on the performance of non-line-of-sight imaging algorithms,different types of bidirectional reflection distribution functions were studied,and the confocal diffusion tomography algorithm in the field of non-line-of-sight imaging was used to simulate and reconstruct non-line-of-sight targets.Finally,glass fiber,purple red paint board,and cement board were taken as examples,a more in-depth exploration of the impact of different object materials on imaging quality was conducted.The simulation results show that for hidden objects,targets with high specular reflectance have blurry reconstruction results,while targets with high specular and diffuse reflectance have less ideal reconstruction quality.Targets with high diffuse reflectance have ideal reconstruction quality,while targets without specular reflectance have clear reconstruction results.In target objects with different scattering characteristics,objects with a smaller proportion of specular reflection are reconstructed with higher quality.This research results provide guidance for the selection of target surface materials in the field of non-line-of-sight targets.