There is no denying that 360-degree shape measurement technology plays an important role in the field of threedimensional optical metrology. Traditional optical 360-degree shape measurement methods are mainly two kinds: the first kind, by placing multiple scanners to achieve 360-degree measurements; the second kind, through the high-precision rotating device to get 360-degree shape model. The former increases the number of scanners and costly, while the latter using rotating devices lead to time consuming. This paper presents a low cost and fast optical 360-degree shape measurement method, which possesses the advantages of full static, fast and low cost. The measuring system consists of two mirrors with a certain angle, a laser projection system, a stereoscopic calibration block, and two cameras. And most of all, laser MEMS scanner can achieve precise movement of laser stripes without any movement mechanism, improving the measurement accuracy and efficiency. What’s more, a novel stereo calibration technology presented in this paper can achieve point clouds data registration, and then get the 360-degree model of objects. A stereoscopic calibration block with special coded patterns on six sides is used in this novel stereo calibration method. Through this novel stereo calibration technology we can quickly get the 360-degree models of objects.
Line structure light measurement needs accurate mechanical movement device and high -frame-rate camera, which is
difficult to realize. We propose a high-speed full-field profilometry to solve these difficult ies, using coded laser strips
projected by a MEMS scanning mirror. The mirror could take place of the mechanical movement device with its high
speed and accurate. Besides, a method with gray code and color code is used to decrease the frames number of projection,
retaining the advantage of line structure light measurement. In the experiment, we use a laser MEMS scanner and two
color cameras. The laser MEMS scanner projects coded stripes, with two color cameras collecting the modulated pattern
on the measured object. The color cameras compose a stereo vision system so that the three-dimensional data is
reconstructed according to triangulation.