Virtual Line Descriptor and Semi-Local Matching Method for Reliable Feature Correspondence

Zhe Liu (1, 2) , Renaud Marlet (2, 1)

1 LIGM - Laboratoire d'Informatique Gaspard-Monge
2 imagine [Marne-la-Vallée]

Finding reliable correspondences between sets of feature points in two images remains challenging in case of ambiguities or strong transformations. In this paper, we define a photometric descriptor for virtual lines that join neighbouring feature points. We show that it can be used in the second-order term of existing graph matchers to significantly improve their accuracy. We also define a semi-local matching method based on this descriptor. We show that it is robust to strong transformations and more accurate than existing graph matchers for scenes with significant occlusions, including for very low inlier rates. Used as a preprocessor to filter outliers from match candidates, it significantly improves the robustness of RANSAC and reduces camera calibration errors.

Mots clés: virtual line descriptor; semi-local matching; feature; correspondence; reliable

Domaines: Vision par ordinateur et reconnaissance de formes [cs.CV]; Traitement du signal et de l'image [eess.SP]; Traitement du signal et de l'image [eess.SP]

Zhe Liu, Renaud Marlet. Virtual Line Descriptor and Semi-Local Matching Method for Reliable Feature Correspondence. British Machine Vision Conference 2012, Sep 2012, United Kingdom. pp.16.1--16.11. ⟨hal-00743323⟩