An Infrared Camera Array Calibration Method using Constant Temperature Heating Checkboard

Abstract

Infrared camera array has been widely used in computer vision, remote sensing and computational Imaging. Due to the lack of a infrared camera array imaging model and a high-quality calibration object, high-quality calibration of the intrinsic and extrinsic parameters of the infrared array camera is a challenge. This letter proposes a calibration method for Infrared camera array. Firstly, we propose an infrared camera array imaging model which contains intrinsic, extrinsic and distortion parameters of all sub-cameras of the infrared camera array. Then, we propose an objective function for infrared camera array calibration and use a non-linear algorithm to solve all parameters in infrared camera array calibration model. To get stable infrared checkboard images, we design a constant temperature heating checkboard. Experiment results show our method can efficiently solve intrinsic, extrinsic and distortion parameters with a low reprojection error and an excellent refocusing performance.