Comparison of methods for edge detection with sub-pixel accuracy in 2D images

Edge detection is often used procedure in digital image processing. For some practical applications is desirable to detect edges with sub-pixel accuracy. In this paper we present comparison of two methods for edge detection with sub-pixel accuracy in 2D images: method based on a B-spline model and moment-based edge operator. The paper presents results of simulations as well as of experiments to compare methods, the L-2 distance is chosen as comparative criterion.