An Automatic Calibration Method for Near-infrared Camera in Optical Surgical Navigation

RongQian Yang (South China University of Technology)
Xuan Si (South China University of Technology)
QinYong Lin (South China University of Technology)
Ken Cai (Zhongkai University of Agriculture and Engineering)

TELKOMNIKA (Telecommunication Computing Electronics and Control)
Vol 13, No 4: December 2015

Optical surgical navigation system (SNS) with near-infrared tracking system is becoming extensively used in clinics, and the accuracy of SNS is influenced by the calibration of near-infrared cameras (NIRCs). We propose an automatic calibration method for NIRCs. The method is based on a designed calibration board. In our experiments, corners are automatically extracted to obtain the parameters of NIRCs. This method has the advantages of saving time, efficiency in computation, high accuracy, and reliability. In our experiments, an NIRC can be calibrated in only 5 s. Meanwhile, the average relative errors of the focal length and principal point are 0.87% and 1.39%, respectively.