https://www.appliedimage.com/product-category/robotic-machine-vision-standards/
Vision Machine Systems Calibration: Targets, Plates, Recognition Grids
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https://calib.io/
Camera Calibration Boards, Targets and Software by Calib.io – calib.io
Professional metal calibration targets and boards for machine and computer vision applications. High quality accurate chessboard (checkerboard) and asymmetric...
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