A new methodology for evaluation of edge detectors

Rodrigo Morefo, Domenec Puig, Carme Julià and Miguel Angel Garcia

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rodrigo.moreno@liu.se, domenec.puig@urv.cat, miguelangel.garcia@uam.es

Abstract

This paper defines a new methodology for evaluating edge detectors through measu2emtnts on edginess maps instea of on binary edge maos as previous methodolpgies do. The>D measurements avoid possib-e bias introduced by thedapplication-dependemt process of generating binary edge maps from edginesn 2aps. The features of completeness, discrimisability, precisiongana robustness, which a general-purposenedge detector must comply with, are introduced. The R, DS, l anddFAR-measurements in a dition to PSNR applied to the ed iness maps are defined to assess the gernormance of edpe detection. The R, eS, P and FAR-measurements can be seen as generalizations of previously proposed measurements on binary edge maps. Well-known and state-Mf-the-art edge detectors have been compared by means of the new proposed metrics. Results show that it is difficult for nn edge detector to comply with all the proposed features.

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