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This program performs the task of camera intrinsic (i.e. "camera lens") calibration. Accurate knowledge of camera intrinsics is essential in obtaining accurate and stable augmented reality tracking, particularly when using feature- and template-based tracking algorithms, as found in artoolkitX's 2D planar tracker.
The application guides the user through the process of capturing images of a calibration target. The underlying calibration routine is supplied by the OpenCV calib3d library. The resulting calibration data can be uploaded to a server and/or saved locally in artoolkitX's binary format (as seen in "camera_para.dat" files).
Versions of the artoolkitX camera calibration app published by artoolkitX allow for uploading to a central server. Once a calibration for a particular device has been submitted, artoolkitX includes built-in support to allow users of the same device to fetch and cache this calibration information at runtime. The calibration service is open-source and users who wish to control the calibrations offered to users o their artoolkitX-based apps are encouraged to set up their own service to provide calibrations. See https://github.com/artoolkitx/artoolkitx-calibration-server.