Detecting corner points from digital curves

Corners in digital images give important clues for shape representation and analysis. Corner points represent important features of an object that may be useful at subsequent levels of processing. If the corner points are identified properly, a shape can be represented in an efficient and compact way with sufficent accuracy in many shape analysis problem. This paper reviews some well referred algorithms. By the empirical study, it has been observed that the some of the methods prove to be superior to the others from different aspects.