1 June 1999 Color-encoded digital fringe projection technique for high-speed 3-D surface contouring
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Abstract
A color-encoded digital fringe projection technique is proposed for high-speed 3-D surface contouring applications. in this technique, a color fringe pattern whose RGB components comprise three phase-shifted fringe patterns is created by software on a computer screen and then projected to an object by a novel computer-controlled digital projection system. The image of the object is captured by a digital camera positioned at an angle different from that of the projection system. The image is then separated into its RGB components, creating three phase-shifted images of the object. These three images are used to retrieve the 3-D surface contour of the object through the use of a phase wrapping and unwrapping algorithm. Only one image of the object is required to obtain the 3-D surface contour of the object. Thus contouring speed, limited only by the frame rate of the camera, can be dramatically increased as compared to that of the traditional phase-shifting techniques. The technique is especially useful in applications where the object being contoured is going through quasi-static or dynamic changes. The principle of the technique is described and some preliminary experimental results are presented.
Peisen S. Huang, Peisen S. Huang, Qingying Hu, Qingying Hu, Feng Jin, Feng Jin, Fu-Pen Chiang, Fu-Pen Chiang, } "Color-encoded digital fringe projection technique for high-speed 3-D surface contouring," Optical Engineering 38(6), (1 June 1999). https://doi.org/10.1117/1.602151 . Submission:
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