Segment Test Based X Corner Detection and Sub-pixel Localization
Jun Wei, Da Liu, Tianmia WANG, Li Juan Cao · ROBOT · 2011
In order to achieve the ability of rapidly detecting and accurately locating X corners, a real-time method to locate X corner in sub-pixel is proposed.Firstly, the image is filtered to find X corner candidates according to symmetry and intensity distribution characteristics of X corner image, and then the segment test is performed for each X corner candidates to confirm it's a X corner, find edges and localize corner in sub-pixel.Experiments show that compared with Harris algorithm, the method can detect X corners and eliminate other corners, provides better positioning accuracy and higher detection speed, and has the capability to process PAL images on line and in real time.