In this paper, we propose a novel projector-camera system for practical and low-cost acquisition of a dense object 3D model with the spectral reflectance property. In our system, we use a standard RGB camera and leverage an off-the-shelf projector as active illumination for both the 3D reconstruction and the spectral reflectance estimation. We first reconstruct the 3D points while estimating the poses of the camera and the projector, which are alternately moved around the object, by combining multi-view structured light and structure-from-motion (SfM) techniques. We then exploit the projector for multispectral imaging and estimate the spectral reflectance of each 3D point based on a novel spectral reflectance estimation model considering the geometric relationship between the reconstructed 3D points and the estimated projector positions. Experimental results on several real objects demonstrate that our system can precisely acquire a dense 3D model with the full spectral reflectance property using off-the-shelf devices.

本文介绍了一种新型的投影仪-相机系统，可实现对物体的密集三维建模和光谱反射性质的低成本获取，该系统利用标准RGB相机和现成投影仪进行光照和结构估计，通过多视点结构光和SfM技术完成构建，并通过多光谱成像估计每个3D点的光谱反射，实验证明该系统可用于获得设备简单而精度高的三维模型和全光谱反射性质。

Pro-Cam SSfM：移动式光投影相机系统用于结构和光谱反射