20.500.12556/DKUM-90154 AHiLS—an algorithm for establishing hierarchy among detected weak local reflection symmetries in raster images A new algorithm is presented for detecting the local weak reflection symmetries in raster images. It uses contours extracted from the segmented image. A convex hull is constructed on the contours, and so-called anchor points are placed on it. The bundles of symmetry line candidates are placed in these points. Each line splits the plane into two open half-planes and arranges the contours into three sets: the first contains the contours pierced by the considered line, while the second and the third include the contours located in one or the other half-plane. The contours are then checked for the reflection symmetry. This means looking for self-symmetries in the first set, and symmetric pairs with one contour in the second set and one contour in the third set. The line which is evaluated as the best symmetry line is selected. After that, the symmetric contours are removed from sets two and three. The remaining contours are then checked again for symmetry. A multi-branch tree representing the hierarchy of the detected local symmetries is the result of the algorithm. computer science algorithms computational geometry computer vision shape features računalniška znanost računalniška geometrija računalniški vid true false true MDPI Angleški jezik Slovenski jezik https://www.mdpi.com/journal/symmetry © 2024 by the authors Članek v reviji 2024-08-23 11:39:59 2024-08-23 11:40:02 2026-01-13 03:17:14 0000-00-00 00:00:00 2024 0 0 14 str. no. 4, [article no.] 442 Vol. 16 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2024-01-16 2024-04-01 2024-04-06 004.9 191759107 10.3390/sym16040442 2073-8994 symmetry-16-00442-v2.pdf symmetry-16-00442-v2.pdf 1 343E63250279111E8BBF6841EA3BF1ED 3d45c4dfe3bc11521073248e034df9bb9b86ae81f8b4ce15afd9a02c6086f282 e1e38e44-efb1-11f0-8437-00155d580e02 https://dk.um.si/Dokument.php?lang=slv&id=201912 https://www.mdpi.com/2073-8994/16/4/442 1 b5e5bae3-6133-11ef-84e9-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=183175 Fakulteta za elektrotehniko, računalništvo in informatiko 0 0 0