Figure 2 - uploaded by Matthieu Cord
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The value of interest point X must be greater or lesser than all its 26 neighbours 5. The scale of the point is determined by the scale of the plan where it was found. Its precise position is computed by interpolation of the scale-space grid. 6. A minimum contrast threshold is applied to filter out low contrast points.
Source publication
Our participation in the Task 1 of the ImagEVAL competition was motivated by our previous work in image identification for cultural institutions. Our approach is based in local descriptors computed around points of interest. We used KD-Trees with the best-bin-first traversal in order to match the descriptors. To eliminate false positives, we ensure...
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The utilization of gradient information is a key issue in building Scale Invariant Feature Transform (SIFT)-like descriptors. In the literature, two types of gradient information, i.e., Gradient Magnitude (GM) and Gradient Occurrence (GO), are used for building descriptors. However, both of these two types of gradient information have limitations i...
