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Only checkerboard pattern is supported.
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OpenCV is used to calibrate cameras.
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## Notes
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> The function requires white space (like a square-thick border, the wider the better) around the board to make the detection more robust in various environments. Otherwise, if there is no border and the background is dark, the outer black squares cannot be segmented properly and so the square grouping and ordering algorithm fails. [src](https://docs.opencv.org/4.1.0/d9/d0c/group__calib3d.html#ga93efa9b0aa890de240ca32b11253dd4a)
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# References
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* [calib.io: Calibration Best Practices](https://calib.io/blogs/knowledge-base/calibration-best-practices)
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* [calib.io: Pattern Generator](https://calib.io/pages/camera-calibration-pattern-generator), note the instructions on printing |
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* [calib.io: Pattern Generator](https://calib.io/pages/camera-calibration-pattern-generator), note the instructions on printing
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* [OpenCV 4.1.0: Camera Calibration and 3D Reconstruction](https://docs.opencv.org/4.1.0/d9/d0c/group__calib3d.html) |
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