System and method for identifying the scale invariant feature of object contours on the image

摘要

The present invention relates to a system and method for identifying scale-invariant features of image contours. The method includes receiving a parametric equation of a closed plane curve, selecting nodes on the closed plane curve having equal spacing, generating a continuous scale space of nodes on the curve, Calculate the curvature circle for each node on the closed curve for each scale in octaves, find the circle of curvature difference between adjacent scales, compare each curvature difference value, and find the minimum or maximum Selecting a node having a difference in curvature as a feature point, and expressing a contour using a descriptor including all the feature points. The method further includes removing feature points closer to each other than a predetermined threshold, and comparing the descriptors with each pre-recorded descriptor belonging to various contours and having at least one with a good match. Discovering one descriptor.