This is a program built to automatically detect a calibration grid in camera images (and provides binaries for download). Detecting the sub-pixel coordinates of image features, such as the corners of a calibration grid, is the first stage of any camera calibration algorithm.
The key strengths of this grid detector are:
- Automatic: The detection of grid features is fully automatic. No clicking of corner points by the user or parameter tuning is required.
- Robust: The grid detector is robust to partial occlusion, and works even when 30% of the grid is occluded. This is useful for calibrating large camera networks since the calibration grid does not have to be completely visible in all cameras.
- Geometric verification: The grid features detected in the image can be matched against the known geometry of the actual calibration grid used. This eliminates all mismatches.