xtsxisaxns / libcbdetect

automatic sub-pixel checkerboard / chessboard / deltille pattern detection

Libcbdetect

• Unofficial implemention of libcbdetect in C++.
• Deltille detector.

Libdetect is a fully automatic sub-pixel checkerboard / chessboard / deltille pattern detection. The algorithm autmatically extracts corners to sub-pixel accuracy and combines them to (rectangular) checkerboards / chessboard-like / deltille patterns.

My calibration tool: Libcalib

Require

• C++ 14
• Opencv >= 3.0

Example

using namespace cbdetect;
cv::Mat img = cv::imread("image.bmp", cv::IMREAD_COLOR);
Params params;
find_corners(img, corners, params);
plot_corners(img, corners);
boards_from_corners(corners, boards);
plot_boards(img, corners, boards);

Reference Papers

[1] Geiger, A., Moosmann, F., Car, Ö., & Schuster, B. (2012, May). Automatic camera and range sensor calibration using a single shot. In Robotics and Automation (ICRA), 2012 IEEE International Conference on (pp. 3936-3943). IEEE.
[2] Schönbein, M., Strauß, T., & Geiger, A. (2014, May). Calibrating and centering quasi-central catadioptric cameras. In Robotics and Automation (ICRA), 2014 IEEE International Conference on (pp. 4443-4450). IEEE.
[3] Placht, S., Fürsattel, P., Mengue, E. A., Hofmann, H., Schaller, C., Balda, M., & Angelopoulou, E. (2014, September). Rochade: Robust checkerboard advanced detection for camera calibration. In European Conference on Computer Vision (pp. 766-779). Springer, Cham.
[4] Ha, H., Perdoch, M., Alismail, H., Kweon, I. S., & Sheikh, Y. (2017, October). Deltille Grids for Geometric Camera Calibration. In 2017 IEEE International Conference on Computer Vision (ICCV) (pp. 5354-5362). IEEE.
[5] Duda, A., & Frese, U. (2018, September). Accurate Detection and Localization of Checkerboard Corners for Calibration. In British Machine Vision Conference (BMCV), 2018.