Product pattern-based camera calibration for microrobotics

Traditional macro camera calibration techniques use multiple images at multiple orientations to obtain the camera´s internal and external calibration parameters. Microscopic camera calibration differs in this by limiting to only one image at fixed orientation (parallel to the image plane) and requiring a special calibration pattern. We propose a method to use the repetitive product pattern as calibration object. A parametric model of an optical microscope validates this approach by comparing the results from the product pattern with an industrial high-accuracy calibration pattern.