Sub-pixel measurement of 3D surfaces by laser scanning

A method for sub-pixel measurement of 3D surfaces based on vision cameras and structured light is presented. The method includes algorithms for sub-pixel calibration, laser stripe detection and 3D reconstruction. In this work, different strategies for sub-pixel calibration and control point extraction are implemented and compared obtaining accuracy around 0.2 pixels for the 3D coordinates. Reconstruction algorithms have been selected to fulfil the accuracy and processing speed demanded in industrial applications.

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