Coded aperture for projector and camera for robust 3D measurement
Coded aperture for projector and camera for robust 3D measurement
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发表时间：
2012-11
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通讯作者：
Yuuki Horita;Yuuki Matugano;H. Morinaga;Hiroshi Kawasaki;S. Ono;M. Kimura;Yasuo Takane
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作者：
Yuuki Horita;Yuuki Matugano;H. Morinaga;Hiroshi Kawasaki;S. Ono;M. Kimura;Yasuo Takane
一般的基于结构光的主动三维测量系统都是基于三角剖分的，这就要求投影图案与摄像机观测图案之间存在对应关系。由于投影图案和摄像机图像都要聚焦在目标上，这就严重限制了三维测量的深度范围。在本文中，我们提出了一种使用编码孔径(CA)的投影仪和摄像系统的技术来放宽这一限制。在我们的方法中，使用了离焦深度(DFD)技术来解决投影图案的离焦问题。通过允许投影的模糊图案，与常见的结构光方法相比，测量范围被扩展。此外，重叠模糊图案也可以用我们的技术来解决。
General active 3D measurement system using structured light is based on triangulation, which requires correspondence between projection pattern and camera observed pattern. Since both the projected pattern and the camera image should be in focus on the target, the condition makes a severe limitation on depth range of 3D measurement. In this paper, we propose a technique using coded aperture (CA) for projector and camera system to relax the limitation. In our method, Depth from Defocus (DfD) technique is used to resolve the de-focus of projected pattern. By allowing blurry pattern of projection, measurement range is extended compared to common structured light methods. Further, overlapped blur pattern can also be resolved with our technique.