When you perform the calibration of the stereo camera on images with a resolution less than 640x480, large errors are obtained. For example, using images with a resolution of 352x288 p. the errors are:
done with RMS error=5.28809
average epipolar err = 4.12764
If I use the same images but with a resolution of 640x480 then the errors are the same:
done with RMS error=0.322039
average epipolar err = 0.280778
Result of calibration with the resolution of 352x288 images. For calibration use the program stereo_calib.
Why do different resolutions produce different errors? Is it possible to calibrate cameras with a resolution of less than 640x480?
