6533b850fe1ef96bd12a84dc
RESEARCH PRODUCT
Extending the sGLOH descriptor
Carlo ColomboFabio Bellaviasubject
Keypoint descriptorMatching (graph theory)Settore INF/01 - InformaticaComputer scienceGLOHStructure (category theory)Scale-invariant feature transformSGLOHExtension (predicate logic)Keypoint descriptor image matching rotation invarianceRunning timeTask (project management)Robustness (computer science)SIFTMatchingAlgorithmdescription
This paper proposes an extension of the sGLOH keypoint descriptor [3] which improves its robustness and discriminability. The sGLOH descriptor can handle discrete rotations by a cyclic shift of its elements thanks to its circular structure, but its performance can decrease when the keypoint relative rotation is in between two sGLOH discrete rotations. The proposed extension couples together two sGLOH descriptors for the same patch with different rotations in order to cope with this issue and it can be also applied straightly to the sCOr and sGOr matching strategies of sGLOH. Experimental results show a consistent improvement of the descriptor discriminability, while different setups can be used to reduce the running time according to the desired task.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-01-01 |