Photometric stereo for general isotropic reflectances by spherical linear interpolation
Photometric stereo for general isotropic reflectances by spherical linear interpolation
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DOI：
10.1117/1.oe.54.8.083104
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发表时间：
2015-08
影响因子：
1.3
通讯作者：
Si Li;Boxin Shi
中科院分区：
文献类型：
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作者：
Si Li;Boxin Shi
抽象的。我们提出了一种实用的光度立体方法，适用于一般各向同性反射率。与之前使用特殊硬件设置或密集测量的方法不同，我们的方法只需要数十个随机但已知的照明方向。通过对光源方向进行球面插值以近似所需照明方向下的场景外观，我们的方法分别计算每个像素的表面法线的方位角和仰角。使用具有 100 种各向同性材料和各种真实世界物体的测量反射率数据库验证了所提出方法的有效性和准确性。
Abstract. We present a practical photometric stereo method that works with general isotropic reflectances. Unlike previous approaches that use special hardware setups or dense measurements, our method only requires dozens of random yet known lighting directions. By spherically interpolating the light source directions to approximate the scene appearance under desired lighting directions, our method separately computes azimuth and elevation angles of the surface normal for each pixel. The effectiveness and accuracy of the proposed method are validated using a measured reflectance database with 100 isotropic materials and various real-world objects.