ing at the laser stripe images with the local bending obtained by the laser triangulation measurement system, a method based on the Fourier-polar transformation algorithm to measure the local bending is proposed. Through the computing, the normal direction of laser stripe is obtained. The gray projection of the spatial-domain image along the normal direction is conducted, and the magnitude of the local bending is obtained directly. This method has advantages of a simple computing process and high immunity to random noises and the non-uniform intensity distribution of laser stripe. The theoretical analysis and experimental test verify the effectiveness of this method.
Fuzhong Bai, Tieying Zhang, Xiaojuan Gao, Yongxiang Xu. Local Bending Measurement of Laser Stripe Images Based on Fourier-Polar Transformation[J]. Acta Optica Sinica, 2018, 38(8): 0815019