目标表面BRDF对非视线成像的影响
Yufeng Yang1,2,3, Kailei Yang1, Ao Zhang1
1College of Automation & Information Engineering, Xi'an University of Technology, Xi'an 710048, China.
Journal of imaging
|November 26, 2024
概括
表面材料显著影响非视线 (NLOS) 图像质量. 优化扩散反射和最大限度地减少镜面反射可以提高NLOS图像清晰度,这对于基于材料的成像应用至关重要.
科学领域:
- 光学是什么?光学是什么?光学是什么?
- 计算机视觉 计算机视觉
- 材料科学 材料科学 材料科学
背景情况:
- 非视线 (NLOS) 成像受到对象表面特性的挑战.
- 了解表面材料对NLOS图像质量的影响对于先进的成像应用至关重要.
研究的目的:
- 调查表面材料特性对NLOS成像质量的影响.
- 为各种材料建模双向反射分布函数 (BRDF),并将其集成到NLOS成像模拟中.
- 量化评估不同表面反射特性对重建图像清晰度的影响.
主要方法:
- 用深度神经网络建模BRDF用于化绝缘材料和白色油漆板,对实证模型进行验证.
- 应用BRDF建模,以适应各种常见材料的数据.
- 使用共聚焦扩散断层扫描算法,重建了具有不同表面材料的NLOS目标.
- 用卷积神经网络进行分类重建图像,以评估成像质量.
主要成果:
- 深度神经网络准确地建模了BRDF,表现优于实证模型.
- 在NLOS重建中,图像清晰度有所改善,镜面反射减少,扩散反射增加.
- 具有高扩散和没有光镜反射的表面产生了最好的NLOS成像结果.
结论:
- 表面材料特性,特别是BRDF,是NLOS成像性能的关键决定因素.
- 尽量减少镜像反射和最大限度地扩散反射是提高NLOS图像质量的关键策略.
- 这项研究为材料意识的NLOS成像和重建提供了一个框架.
相关概念视频
01:05Total Internal Reflection Fluorescence Microscopy
5.6K
Total internal reflection fluorescence microscopy or TIRF is an advanced microscopic technique used to visualize fluorophores in samples close to a solid surface with a higher refractive index, such as a glass coverslip. TIRF only allows fluorophores in proximity to the solid surface to be excited. When light from a medium with a lower refractive index (such as air) hits the glass coverslip at a critical angle, the light undergoes total internal reflection stead of passing through the glass.
5.6K
01:26Influence of Earth's Curvature and Atmospheric Refraction on Leveling
54
During leveling, the Earth's curvature and atmospheric refraction introduce deviations in the line of sight from a true horizontal reference. When the line of sight is leveled, it remains perpendicular to the plumb line only at a single point. Beyond this, it deviates due to the Earth’s curvature, represented by the correction C. For a sight distance D, the deviation can be derived using the relationship:This relationship shows that the deviation increases quadratically with distance.
54