text: do not calculate mean for empty angles list

d7ca0bde · Maksim Shabunin · db3d7e85 · d7ca0bde
Commit d7ca0bde authored Jul 18, 2018 by Maksim Shabunin
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erfilter.cpp modules/text/src/erfilter.cpp +2 -1

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--- a/modules/text/src/erfilter.cpp
+++ b/modules/text/src/erfilter.cpp
@@ -2687,7 +2687,8 @@ double MaxMeaningfulClustering::probability(vector<int> &cluster)
    //for (int kk=0; kk<angles.size(); kk++)
    //  cout << angles[kk] << " ";
    //cout << endl;
-
+    if (angles.empty() || edge_distances.empty())
+        return 0;
    meanStdDev( angles, mean, std );
    sample.push_back((float)std[0]);
    sample.push_back((float)mean[0]);