A Novel Line Scan Camera Calibration Technique With an Auxiliary Frame Camera

Abstract

A practical line scan camera calibration technique for close-range photogrammetric applications is proposed. It is implemented by rigidly coupling the line scan camera to an auxiliary frame camera whose intrinsic parameters have been obtained in advance. Then, the calibration is divided into two independent stages. First, images of a 2-D dynamic pattern are acquired by the two cameras from several different views. Based on these images and line scan camera model, intrinsic parameters of the line scan camera and rigid transform parameters between the two coupled cameras are calibrated. This work can be accomplished previously in workroom. Secondly, in photogrammetry, extrinsic parameters of the line scan camera are determined indirectly via space resection of the auxiliary frame camera and the obtained rigid transform parameters of the two cameras. Experiments show that our calibration can provide robust and accurate results.