We present a method for 3D reconstruction only using calibrated multi-view
surface azimuth maps. Our method, multi-view azimuth stereo, is effective for
textureless or specular surfaces, which are difficult for conventional
multi-view stereo methods. We introduce the concept of tangent space
consistency: Multi-view azimuth observations of a surface point should be
lifted to the same tangent space. Leveraging this consistency, we recover the
shape by optimizing a neural implicit surface representation. Our method
harnesses the robust azimuth estimation capabilities of photometric stereo
methods or polarization imaging while bypassing potentially complex zenith
angle estimation. Experiments using azimuth maps from various sources validate
the accurate shape recovery with our method, even without zenith angles.

本文提出了一种仅使用校准多视图表面方位地图进行三维重建的方法 —— 多视图方位立体。这种方法对于无纹理或具有镜面效果的表面来说非常有效，并通过引入切空间一致性概念，在使用光度立体方法或偏振成像时，利用切空间一致性以恢复形状，从而绕过了可能的复杂天顶角估计。实验表明，即使没有天顶角，使用来自各种来源的方位地图，我们的方法也能够验证准确的形状恢复。