Camera Calibration External Parameters Amendments In Vision Measuring

In the field of vision measuring, camera calibration is a necessary precondition of the three-dimensional measurements. For the sake of obtaining high-precision external parameters, the inadequacies which cycling conditions restrict external parameters calculation in traditional calibration method was founded and elaborated in detail. The re-projection error was re-selected as cycling conditions and a new amended method was designed to solve the above shortcomings. Then Binocular vision system calibration experiments was carried, it has been found that standard deviation and the maximum error of three-dimensional reconstruction target after the amendments for external parameters is less than the calibration errors before the amendments.