Hi I'm trying the chessboard calibration since a while. Everything is looking good. The edges are detected very well and the lines get drawn on my chessboard as well. The issue comes when I try to calculate the error. To be specific after/when I call the CornerSubPix()funktion.
Thats how I call the method:
CvInvoke.CornerSubPix(_GrayFrame, _CornersPointsVec[k], new Size(11, 11), new Size(-1, -1), new MCvTermCriteria(30, 0.1));
where _GrayFrame is Emgu.CV.Mat which is the "image" I'm using.
_CornersPointsVec is Emgu.CV.Util.VectorOfPointF
Throwing the following exeption:
Emgu.CV.Util.CvException: OpenCV: count >= 0
at Emgu.CV.CvInvoke.CvErrorHandler(Int32 status, IntPtr funcName, IntPtr errMsg, IntPtr fileName, Int32 line, IntPtr userData)
at Emgu.CV.CvInvoke.cveCornerSubPix(IntPtr image, IntPtr corners, Size& win, Size& zeroZone, MCvTermCriteria& criteria)
at Emgu.CV.CvInvoke.CornerSubPix(IInputArray image, IInputOutputArray corners, Size win, Size zeroZone, MCvTermCriteria criteria)
obviously this exeption is not very helpful in therms what could be wrong. So I hope someone can give me at last an hint ...