v0.2.50..v0.2.51 changeset IntersectionOverUnionExtractor.h

diff --git a/hoot-core/src/main/cpp/hoot/core/algorithms/extractors/IntersectionOverUnionExtractor.h b/hoot-core/src/main/cpp/hoot/core/algorithms/extractors/IntersectionOverUnionExtractor.h
new file mode 100644
index 0000000..1b9ea4d
--- /dev/null
+++ b/hoot-core/src/main/cpp/hoot/core/algorithms/extractors/IntersectionOverUnionExtractor.h
@@ -0,0 +1,73 @@
+/*
+ * This file is part of Hootenanny.
+ *
+ * Hootenanny is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * --------------------------------------------------------------------
+ *
+ * The following copyright notices are generated automatically. If you
+ * have a new notice to add, please use the format:
+ * " * @copyright Copyright ..."
+ * This will properly maintain the copyright information. DigitalGlobe
+ * copyrights will be updated automatically.
+ *
+ * @copyright Copyright (C) 2019 DigitalGlobe (http://www.digitalglobe.com/)
+ */
+#ifndef INTERSECTION_OVER_UNION_EXTRACTOR_H
+#define INTERSECTION_OVER_UNION_EXTRACTOR_H
+
+// hoot
+#include <hoot/core/elements/Element.h>
+#include <hoot/core/algorithms/extractors/FeatureExtractorBase.h>
+
+namespace hoot
+{
+
+class OsmMap;
+
+/**
+ * Calculates Intersection over Union (IoU) for polygons
+ *
+ * https://stackoverflow.com/questions/28723670/intersection-over-union-between-two-detections
+ *
+ * https://www.pyimagesearch.com/2016/11/07/intersection-over-union-iou-for-object-detection/
+ */
+class IntersectionOverUnionExtractor : public FeatureExtractorBase
+{
+public:
+
+  static std::string className() { return "hoot::IntersectionOverUnionExtractor"; }
+
+  /**
+   * @see FeatureExtractor
+   */
+  virtual std::string getClassName() const override
+  { return IntersectionOverUnionExtractor::className(); }
+
+  /**
+   * @see FeatureExtractor
+   */
+  virtual double extract(const OsmMap& map, const ConstElementPtr& target,
+    const ConstElementPtr& candidate) const override;
+
+  /**
+   * @see ApiEntityInfo
+   */
+  virtual QString getDescription() const
+  { return "Calculates Intersection over Union (IoU) for polygons"; }
+};
+
+}
+
+#endif // INTERSECTION_OVER_UNION_EXTRACTOR_H