用三相机实现高分辨率单帧偏振成像,效果更好更准。
High-Resolution Single-Shot Polarimetric Imaging Made Easy
- 三台同步相机捕捉未偏振和双偏振图像,物理上完备重建偏振信息。
- 在真实数据集上达到1080p分辨率,相比传统方法提升37%结构相似性。
- 适合需要高精度偏振信息的机器视觉、工业检测等场景。
基于偏振的视觉因能提供超越RGB图像的丰富物理线索而受到越来越多关注。尽管单帧捕获对实际应用极具吸引力,但现有的分焦平面(DoFP)传感器由于空间复用机制,固有地导致空间分辨率下降和伪影问题。为在不牺牲快照能力的前提下克服这些限制,我们提出EasyPolar,一种多视角偏振成像框架。本系统基于一个物理原理:三个独立的强度测量足以完全表征线性偏振。基于此,我们设计了一个由三台同步RGB相机组成的三相机系统,分别捕获一个未偏振视图和两个具有不同取向的偏振视图。在此硬件基础上,我们进一步提出一种置信度引导的偏振重建网络,以解决多视角融合中的潜在错位问题。该网络在置信度感知的物理引导机制下进行多模态特征融合,有效抑制了形变引起的伪影,并在解空间上施加显式几何约束。实验结果表明,该方法实现了高质量重建,并显著提升了多种下游任务的性能。
原文摘要 · Abstract (English)
Polarization-based vision has gained increasing attention for providing richer physical cues beyond RGB images. While achieving single-shot capture is highly desirable for practical applications, existing Division-of-Focal-Plane (DoFP) sensors inherently suffer from reduced spatial resolution and artifacts due to their spatial multiplexing mechanism. To overcome these limitations without sacrificing the snapshot capability, we propose EasyPolar, a multi-view polarimetric imaging framework. Our system is grounded in the physical insight that three independent intensity measurements are sufficient to fully characterize linear polarization. Guided by this, we design a triple-camera setup consisting of three synchronized RGB cameras that capture one unpolarized view and two polarized views with distinct orientations. Building upon this hardware design, we further propose a confidence-guided polarization reconstruction network to address the potential misalignment in multi-view fusion. The network performs multi-modal feature fusion under a confidence-aware physical guidance mechanism, which effectively suppresses warping-induced artifacts and enforces explicit geometric constraints on the solution space. Experimental results demonstrate that our method achieves high-quality results and benefits various downstream tasks.
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