Checkerboard calibration method for an IR imaging alarm system with a large FOV

A cost-effective, easy-to-produce calibration chessboard and a corner detection algorithm to enhance the calibration precision of an infrared (IR) imaging alarm system with a large field of view (FOV) are introduced. We present the manufacturing process for the calibration plate and conduct an experimental evaluation to verify its performance. The results confirm that our checkerboard calibration can achieve superior distortion correction accuracy, satisfying subsequent image processing requirements. This research provides practical insights and could serve as a theoretical reference for future IR camera calibration studies.