Pattern design and realization for calibrating near infrared camera in surgical navigation

• 作 者: 温小艳 刘素娟 杨荣骞 王志刚
• 机 构: Department of Biomedical Engineering,South China University of Technology,
• 出 处: Optoelectronics Letters
• 发表日期: 2012年06期
• 关键词: camera calibration realization navigation pixel coordinates captured mounted spo

A calibration board composed of 8×8 near-infrared surface-mounted diodes(NIR-SMDs)(940 nm)is designed.Meanwhile,a common binocular measurement system with the average error less than 0.1320 mm is used to obtain the geometric information of this board.A calibration method with the designed pattern is performed to obtain the parameters of the near-infrared camera(NIRC).In the experiment,the average relative errors of focal length and principal point are 0.244%and 0.735%,respectively.The mean of image residuals is less than 0.01 pixel.The error of three-dimensional(3D)measurement is less than 0.3 mm.All those results indicate that the designed calibration board is suitable and accurate for calibrating NIRC.

A calibration board composed of 8 × 8 near-infrared surface-mounted diodes (NIR-SMDs) (940 nm) is designed.Meanwhile, a common binocular measurement system with the average error less than 0.1320 mm is used to obtain the geometric information of this board. A calibration method with the designed pattern is performed to obtain the parameters of the near-infrared camera (NIRC) .In the experiment, the average relative errors of focal length and principal point are 0.244% and 0.735% respectively. mean of image residuals is less than 0.01 pixel. The error of three-dimensional (3D) measurement is less than 0.3 mm. All these results that the designed calibration board is suitable and accurate for calibrating NIRC.