Image Processing 39 - Subpixel Corner Detection

Optimize corner positions.

void cv::cornerSubPix(InputArray image,
                    InputOutputArray corners,
                    Size winSize,
                    Size zeroZone,
                    TermCriteria criteria
                    )

The function iterates to find the sub-pixel exact location of the corner or radial saddle point, as described in [82], as shown in the following figure.