I'm using ArUco with OpenCV to calibrate my iPhone camera and estimate the pose of the marker in the scene. To calibrate the camera, I used the normal (photo) option in the iPhone's camera but then realised that I will need to capture squared images for pose estimation, i.e. using the "square" option in the camera.
I'm wondering if I need to re-calibrate the camera using only squared images? i.e. does the image ratio affect the calibration result?
Also, I will be using the calibration results to find a marker position relative to the camera (i.e. estimatePoseSingleMarkers), I tried it with my current calibration result and drew the axes on top of the detected marker, it seems ok but my problem is that the numbers I'm getting are a bit strange (e.g. the camera is actually 40 cm away from the object centre (y)) but I'm getting a very small number.
Thanks! I hope that my question is clear.