An improved model for surround suppression by steerable filters and multilevel inhibition with application to contour detection

Giuseppe Papari*, Nicolai Petkov

*Bijbehorende auteur voor dit werk

OnderzoeksoutputAcademic

52 Citaten (Scopus)
356 Downloads (Pure)

Samenvatting

Psychophysical and neurophysiological evidence about the human visual system shows the existence of a mechanism, called surround suppression, which inhibits the response of an edge in the presence of other similar edges in the surroundings. A simple computational model of this phenomenon has been previously proposed by us, by introducing an inhibition term that is supposed to be high on texture and low on isolated edges. While such an approach leads to better discrimination between object contours and texture edges w.r.t. methods based on the sole gradient magnitude, it has two drawbacks: first, a phenomenon called self-inhibition occurs, so that the inhibition term is quite high on isolated contours too; previous attempts to overcome self-inhibition result in slow and inelegant algorithms. Second, an input parameter called "inhibition level" needs to be introduced, whose value is left to heuristics. The contribution of this paper is two-fold: on one hand, we propose a new model for the inhibition term, based on the theory of steerable filters, to reduce self-inhibition. On the other hand, we introduce a simple method to combine the binary edge maps obtained by different inhibition levels, so that the inhibition level is no longer specified by the user. The proposed approach is validated by a broad range of experimental results. (C) 2010 Elsevier Ltd. All rights reserved.

Originele taal-2English
Pagina's (van-tot)1999-2007
Aantal pagina's9
TijdschriftPattern recognition
Volume44
Nummer van het tijdschrift9
DOI's
StatusPublished - sep-2011
Evenement13th International Conference on Computer Analysis of Images and Patterns - , Germany
Duur: 2-sep-20094-sep-2009

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