Calibration of a laser stripe profiler

Total quality control for automotive raw foundry brake disks

“…In the present paper, a new calibration method, which does not require mechanical alignment, is presented. It extends the proposal from McIvor, applicable to the linear case [9,10], to the rotating case.…”

“…Furthermore, an intensity image from the camera is often required, which prevents one from using optical filters to remove surrounding light. To avoid these disadvantages, a new calibration method that allows a direct relation between image and object co-ordinates to be obtained has been recently proposed [9,10]. Nonetheless, this method can only be used in the case of an object with uniform linear motion.…”

Fully Automated Laser Range Calibration

“…Several methods move a robotic arm, to which the laser is attached, and capture range data of a fixed planar surface at different orientations; knowledge of precise relative arm pose is assumed [8,2]. McIvor places a cubic calibration target on a motion table, and "scans" the object with the lidar to obtain both range and intensity data; the laser pose that best rectifies the data to the known target geometry is then determined [5]. Finally, Zhang and Pless estimate egomotion of a moving robot via robust matching of consecutive lidar scans over time, using the structure of the surrounding environment to constrain the hand-eye lidar pose [9].…”

Implementation and experimental study on fast object modeling based on multiple structured stripes

“…The template is composed of two orthogonal planar surfaces, with 128 circular black fiducial marks evenly distributed on the two white surfaces. The position of each mark on the template is known with high accuracy, while the corresponding coordinates in the image is estimated in sub-pixel accuracy by computing the centroid of the image of each mark [8,13]. Fig.…”

“…In [7], the light stripe is modeled as a light stripe plane and the calibration is to recover the parameters of the plane. McvIor [8] and Valkenburg [5] model the projector as a reverse pinhole camera with 1D image that can be defined by a 2 Â 4 matrix. Shen and Menq [2] propose a method to calibrate all light beams projected from the digital projector.…”