Abstract
The paper presents a camera calibration error of pin-plate target study method for rail profile measurement based on computer vision. The camera calibration pin-plate target is designed according to real rail profile. The camera for rail profile vision measurement is calibrated by pin-plate target. Both structured light vision measurement model and 1-D camera projection model are established from the perspective of geometric optics to study the cause and value of camera calibration error based on pin-plate target. The results of the experimental study show that the target inclination and pixel offset of pin-plate target have an effect on the camera calibration for rail profile vision measurement. With the increase of target inclination and pixel offset, the camera calibration error increases continuously. It provides an optimized direction and research aim for fast camera calibration method of rail profile vision measurement.
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