Stereoscopic video endoscopes are widely used for remote visual inspection and precise three-dimensional (3D)measurements in industrial and biomedical applications. The reconstruction of 3D points from the corresponding imagepoints requires calibration procedure which accuracy affects the measurement uncertainty. We propose to perform anoptimal choice of the calibration technique and the calibration target parameters using the computer simulation at thedesign stage. The effectiveness of this approach is demonstrated via the design of self-developed miniature prism-basedstereoscopic system. We simulated acquisition of the calibration and measurement data using optical design software. Theconventional calibration technique requiring many positions of the flat target with arbitrary displacements and rotationswas compared with another one, which uses the translation stage to provide pure translation of the target. We analyzed theimpact of the translation uncertainty, the number of positions, the number of targets and the uncertainty of image pointcoordinates on the uncertainty of calibration parameters and 3D measurements. We have shown that the second techniquecould provide the same calibration accuracy as the first one with less number of images. The results of computer simulationwere confirmed experimentally using the prototype of the self-developed stereoscopic endoscope. The proposed approachmay be used to optimize calibration techniques and reduce a cost of calibration equipment for various stereoscopicmeasurement systems.
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