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Merge pull request #13940 from alalek:fix_13914

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This commit is contained in:
Alexander Alekhin 2019-03-01 19:32:36 +00:00
commit f0179f96a7
1 changed files with 10 additions and 6 deletions
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16
modules/ml/src/svm.cpp
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@ -205,11 +205,14 @@ public:
for( j = 0; j < vcount; j++ )
{
Qfloat t = results[j];
Qfloat e = std::exp(std::abs(t));
if( t > 0 )
results[j] = (Qfloat)((e - 1.)/(e + 1.));
else
results[j] = (Qfloat)((1. - e)/(1. + e));
Qfloat e = std::exp(std::abs(t)); // Inf value is possible here
Qfloat r = (Qfloat)((e - 1.) / (e + 1.)); // NaN value is possible here (Inf/Inf or similar)
if (cvIsNaN(r))
r = std::numeric_limits<Qfloat>::infinity();
if (t < 0)
r = -r;
CV_DbgAssert(!cvIsNaN(r));
results[j] = r;
}
}
@ -327,7 +330,7 @@ public:
const Qfloat max_val = (Qfloat)(FLT_MAX*1e-3);
for( int j = 0; j < vcount; j++ )
{
if( results[j] > max_val )
if (!(results[j] <= max_val)) // handle NaNs too
results[j] = max_val;
}
}
@ -1949,6 +1952,7 @@ public:
const DecisionFunc& df = svm->decision_func[dfi];
sum = -df.rho;
int sv_count = svm->getSVCount(dfi);
CV_DbgAssert(sv_count > 0);
const double* alpha = &svm->df_alpha[df.ofs];
const int* sv_index = &svm->df_index[df.ofs];
for( k = 0; k < sv_count; k++ )