We describe methods to measure the following properties of gray level corners: subtended
angle, orientation, contrast, bluntness (or rounding of the apex), and boundary curvature (for
cusps). Unlike most of the published methods for extracting these properties these new
methods are relatively simple, efficient, and robust. They rely on the corner being
predetected by a standard operator, thus making the measurement problem more tractable.
Using 13,000 synthetic images the methods are assessed over a range of conditions …