Hi Michael Lowell,
I understand that you want to know how to get the checkerboard detected in the Point Cloud. From the description you have provided, I understand that you have already used 'Edit ROI', which has not been successful in detecting the checkerboard.
To move forward, you can use 'Select Checkerboard' on the app toolstrip. The app opens the Select Checkerboard tab, where you can manually select checkerboard points in any point cloud frame.
Please refer to the following documentation on "Select Checkerboard Region" for more information on how to use Select Checkerboard: https://www.mathworks.com/help/lidar/ug/get-started-lidar-camera-calibrator.html?searchHighlight=lidar%20camera%20calibrator&s_tid=srchtitle_support_results_5_lidar%20camera%20calibrator#:~:text=Edit%20ROI.-,Select%20Checkerboard%20Region,-To%20further%20tune
As for the checkerboard, the one you have used appears to be in line with the checkerboard guidelines. However, please go through the following documentation on creating and printing guidelines for a checkerboard for a better understanding: https://www.mathworks.com/help/lidar/ug/lidar-camera-calibration-guidelines.html?searchHighlight=lidar%20camera%20calibrator&s_tid=srchtitle_support_results_6_lidar%20camera%20calibrator#:~:text=%2DCamera%20Calibration%3F-,Checkerboard%20Guidelines,-When%20using%20the
Regarding the rotation, the checkerboard should point towards the front axes of the camera (z-axis) and LIDAR sensor (x-axis). Also, please go through the following 'Guidelines for Capturing Data', which has instructions regarding avoiding motion blur and holding the checkerboard target, which will help in accurate feature detection: https://www.mathworks.com/help/lidar/ug/lidar-camera-calibration-guidelines.html?searchHighlight=lidar%20camera%20calibrator&s_tid=srchtitle_support_results_6_lidar%20camera%20calibrator#:~:text=of%20the%20checkerboard.-,Guidelines%20for%20Capturing%20Data,-Capture%20data%20from
Hope this helps.
