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Fix nan values if matched to single point

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This commit is contained in:
Patrick Niklaus 2015-02-09 12:41:30 +01:00
parent 1bcf41d382
commit 4838ffb82d
1 changed files with 8 additions and 3 deletions
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11
plugins/map_matching.hpp
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@ -81,15 +81,20 @@ template <class DataFacadeT> class MapMatchingPlugin : public BasePlugin
matched_nodes[current_node].location, matched_nodes[current_node].location,
matched_nodes[current_node + 1].location); matched_nodes[current_node + 1].location);
} }
double distance_feature = -std::log(trace_length / matching_length); double distance_feature = -std::log(trace_length) + std::log(matching_length);
// matched to the same point
if (!std::isfinite(distance_feature))
{
return std::make_pair(ClassifierT::ClassLabel::NEGATIVE, 1.0);
}
auto label_with_confidence = classifier.classify(distance_feature); auto label_with_confidence = classifier.classify(distance_feature);
// "second stage classifier": if we need to remove points there is something fishy // "second stage classifier": if we need to remove points there is something fishy
if (removed_points > 0) if (removed_points > 0)
{ {
label_with_confidence.first = ClassifierT::ClassLabel::NEGATIVE; return std::make_pair(ClassifierT::ClassLabel::NEGATIVE, 1.0);
label_with_confidence.second = 1.0;
} }
return label_with_confidence; return label_with_confidence;