2 August 2010 A new color structured light coding method for three-dimensional measurement of isolated objects
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Abstract
A new coding method is proposed for measuring the three-dimensional (3D) shape of spatially isolated objects . Based on Gray Code and sinusoidal stripe, this coded fringe pattern whose RGB components comprise the multiplications of three different frames in Gray Code and sinusoidal stripes, appears to be digital color coded sinusoidal fringes. The digital color coded sinusoidal fringe pattern is created by software on a computer and then projected to the tested object's surface by a projector, and the image of the object is captured by a camera positioned at an angle different from that of the projector, then the image is processed, color Gray Codes are used to obtain the phase order and sinusoidal stripes are used to get the wrapped phase, then the wrapped phase can be unwrapped and the 3D surface information can be retrieved. With only one image, 3D shape of the isolated objects can be exactly reconstructed, thus the speed is limited only by the frame rate of camera. The principle of this technique is described and an actual measurement is presented, the result of the reconstructed shapes proves the correctness and feasibility of this new coding method.
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Ke Ma, Ke Ma, Qican Zhang, Qican Zhang, } "A new color structured light coding method for three-dimensional measurement of isolated objects", Proc. SPIE 7790, Interferometry XV: Techniques and Analysis, 77901B (2 August 2010); doi: 10.1117/12.860372; https://doi.org/10.1117/12.860372
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