Surface orientation imager using three-phase amplitude-modulated illumination and correlation image sensor
Surface orientation imager using three-phase amplitude-modulated illumination and correlation image sensor
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DOI：
10.1117/12.473126
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发表时间：
2003-01
期刊：
影响因子：
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通讯作者：
T. Kurihara;Nobutaka Ono;S. Ando
中科院分区：
文献类型：
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作者：
T. Kurihara;Nobutaka Ono;S. Ando
我们提出了一种新的系统，用于实时三维表面取向测量。我们的方法的优点是：（1）单帧捕获法向矢量分布，（2）密集，逐像素捕获法向矢量，（3）独立于表面反射率和背景照明。该系统由两部分组成，一部分是三角形顶点处的正弦幅度调制三相（3P）光源，另一部分是用于解调来自表面的反射光的幅度和相位的三相相关图像传感器（3PCIS）。基于光度立体原理，相位和振幅可以很容易地分别转换为表面法向矢量的方位角和倾角。我们用自行研制的CMOS 64 × 64像素3PCIS实现了该系统，并在其帧率（30Hz）下成功地重建了法向量图。
We propose a novel system for real-time three-dimensional surface orientation measurement. The advantages of our method are: (1) single frame capture of normal vector distribution, (2) dense, pixel-wise capture of normal vectors, and (3) independence on surface reflectance and background illumination. This system consists of two components; one is the sinusoidally amplitude-modulated three-phase (3P) light sources at vertices of a triangle and another is the three-phase correlation image sensor (3PCIS) for demodulating the amplitude and phase of reflected light from the surface. Based on the photometric stereo principle, the phase and amplitude can be easily converted to the azimuth and inclination, respectively, of the normal vector of the surface. We implemented this system using our CMOS 64 × 64 pixel 3PCIS developed by us and successfully reconstructed the normal vector map in its frame rate (30Hz).