Open-Harbor/osrm-backend
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases 3 Wiki Activity

Fix nan values if matched to single point

Browse Source
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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
plugins/map_matching.hpp
View File

@ -81,15 +81,20 @@ template <class DataFacadeT> class MapMatchingPlugin : public BasePlugin
matched_nodes[current_node].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);
// "second stage classifier": if we need to remove points there is something fishy
if (removed_points > 0)
{
label_with_confidence.first = ClassifierT::ClassLabel::NEGATIVE;
label_with_confidence.second = 1.0;
return std::make_pair(ClassifierT::ClassLabel::NEGATIVE, 1.0);
}
return label_with_confidence;