I am using the stereoCameraCalibrator app in MATLAB. I have used it a number of times before with no issues. However, today I am encountering the error: "no checkerboards detected in the images". This is weird because I have double checked to see that both folders have the necessary frames/images. And that each of the images have the necessary checkerboard. I am using the same checkerboard that I have used successfully in the past, under the same lighting conditions and the checkerboard is at the exact same distance from the exact same cameras I have used in the past.
May you please assist me. This is weird. I may be doing something stupid but I can't seem to figure it out. Googling and checking for solutions from people who have encountered this in the past did not help. Thank you.