Blink-Spot Projection Method for Fast Three-Dimensional Shape Measurement
Blink-Spot Projection Method for Fast Three-Dimensional Shape Measurement
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DOI：
10.20965/jrm.2015.p0430
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发表时间：
2015-08-01
影响因子：
1.1
通讯作者：
Ishii, Idaku
中科院分区：
文献类型：
--
作者：
Chen, Jun;Gu, Qingyi;Ishii, Idaku
我们提出了一种用于观察运动三维（3D）场景的盲点投影方法。所提出的方法可以减少同步误差的顺序结构光照明，这是由于多个光图案的投影与不同的时间时，观察到快速移动的目标。在我们的方法中，一系列的斑点阵列图案，其斑点大小的变化在不同的时间对应于他们的标识（ID）号，被投影到场景中进行测量的高速投影仪。基于使用投影点的ID号对投影点进行同步和鲁棒的帧到帧跟踪，即使在相机视图中存在快速移动时，也可以在没有失准的情况下获得测量场景的3D形状。我们使用高帧率投影仪相机系统实现了我们的方法，该系统可以以500 fps的速度实时处理512 x 512像素的图像，以跟踪和识别图像中的16 x 16个点。当3D模块安装在快速移动的六自由度机械臂上时，通过几个3D形状测量证明了其有效性。
We present a blink-spot projection method for observing moving three-dimensional (3D) scenes. The proposed method can reduce the synchronization errors of the sequential structured light illumination, which are caused by multiple light patterns projected with different timings when fast-moving objects are observed. In our method, a series of spot array patterns, whose spot sizes change at different timings corresponding to their identification (ID) number, is projected onto scenes to be measured by a high-speed projector. Based on simultaneous and robust frame-to-frame tracking of the projected spots using their ID numbers, the 3D shape of the measuring scene can be obtained without misalignments, even when there are fast movements in the camera view. We implemented our method with a high-frame-rate projector-camera system that can process 512 x 512 pixel images in real-time at 500 fps to track and recognize 16 x 16 spots in the images. Its effectiveness was demonstrated through several 3D shape measurements when the 3D module was mounted on a fast-moving six-degrees-of-freedom manipulator.