Usage: opencv_interactive-calibration [params] --ad (value:DICT_4X4_50) Name of predefined ArUco dictionary. Available ArUco dictionaries: DICT_4X4_50, DICT_4X4_100, DICT_4X4_250, DICT_4X4_1000, DICT_5X5_50, DICT_5X5_100, DICT_5X5_250, DICT_5X5_1000, DICT_6X6_50, DICT_6X6_100, DICT_6X6_250, DICT_6X6_1000, DICT_7X7_50, DICT_7X7_100, DICT_7X7_250, DICT_7X7_1000, DICT_ARUCO_ORIGINAL, DICT_APRILTAG_16h5, DICT_APRILTAG_25h9, DICT_APRILTAG_36h10, DICT_APRILTAG_36h11 --ci (value:0) Default camera id -d (value:0.8) Min delay between captures --dst (value:295) Distance between white and black parts of daulCircles template --fad (value:None) name of file with ArUco dictionary --flip (value:false) Vertical flip of input frames --force_reopen (value:false) Forcefully reopen camera in case of errors --ft (value:true) Auto tuning of calibration flags -h Height of template (in corners or circles) --help (value:true) Print help --of (value:cameraParameters.xml) Output file name --pf (value:defaultConfig.xml) Advanced application parameters --save_frames (value:false) Save frames that contribute to final calibration --sz (value:16.3) Distance between two nearest centers of circles or squares on calibration board -t (value:circles) Template for calibration (circles, chessboard, dualCircles, charuco, symcircles) -v Input from video file --vis (value:grid) Captured boards visualisation (grid, window) -w Width of template (in corners or circles) --zoom (value:1) Zoom factor applied to the preview image