Unfortunately, I was not able to find any solution to my question.
What I'm trying to do is to improve the results using the OpenCV-method cvFindChessboardCorners in order to be able to achieve a better camera calibration, because I think that this is the reason why I get poor results undistorting/rectifying images like in my question before (Question: Undistorting/rectify images with OpenCV).
So, what I want to know is, how I can improve the algorithm in order to be able to detect the chessboard corners in all images of this link: http://abload.de/img/cvfindchessboardcorneoxs73.jpg
Everything works fine, only in the two last images the chessboard could not be detected. Any help or advice or hint is very welcome!
Thanks in advance!
来源：https://stackoverflow.com/questions/21428124/improve-cvfindchessboardcorners