The Research of Vision Calibration Method for Target Localization

An important task for target localization is camera calibration, whose purpose is to estimate the internal and external parameters of cameras. A exact mathematical model was established based on a strict geometric constraint relationship. A fast method of external common tangent was provided to obtain the image coordinates. The other parameters of the camera was computed in a reasonable method to guarantee the parameter accuracy of the camera. After the position of the spot on the calibration template is computed based on camera calibration parameters, the computed spot position is compared with its real position for verifying its accuracy. The experiments indicate that the calibration parameters obtained by the method are accurate and reliable, the computing speed and the accuracy are effectively improved. The model is accuracy and stability, and the accuracy requirement for the position estimation of the target localization can be satisfied.