I hoped somebody would recognize one of the problems and give me advice how to solve it. Isn’t this forum to help people? Yes I always try to solve it myself first. But I seemed to be stucked with these ones.
And I assumed that pictures say much more then words. Maybe more experienced users get additional info this way because of the information around it.
he wasn’t asking for prose. he was asking you to copy the text that’s in the pictures. you know why? that allows search engines to find this thread and help others.
anyway, let’s work on the first point: termination criteria.
read OpenCV documentation for the function cornerSubPix, which uses those things in your code.
then you figure out what needs to be changed. you can guess and try.
report back with what you’ll have tried and what exact results you got.
we can help you a lot but we won’t do your work for you.