Ready-to-use calibration targets and fiducial markers for OpenCV, MATLAB, ROS, and more, supporting accurate calibration and pose estimation.
ArUco
Rigid, dimensionally stable panels keep marker patterns flat for accurate pose estimation at longer working distances.
Industrial-grade printing and weatherproof matte laminate provide sharp, high-contrast markers for reliable detection indoors or out.
ChArUco
Combines chessboard-level corner accuracy with marker identification, supporting calibration even when part of the board is occluded.
Checkerboard
Designed for OpenCV's findChessboardCornersSB detector, with a wide white border and rounded corner-cell markers for reliable detection.
The classic checkerboard offers high-accuracy corners for intrinsic calibration, lens-distortion correction and stereo-rig alignment.
Circle Grid
Alternating offset rows remove 180° rotational ambiguity, allowing a unique board orientation to be determined from detected circle centers.
An inverted white-on-black version of the asymmetric circle grid, retaining offset rows for unambiguous target orientation.
A regular rectangular lattice suited to fixed-viewpoint rigs and constrained setups using OpenCV or MATLAB circle-grid calibration.
AprilGrid / Kalibr
An AprilGrid built for Kalibr multi-camera and camera-IMU calibration, including setups where only part of the target is visible.
