Fixed FernClassifier

modules/features2d/src/descriptors.cpp

@@ -671,9 +671,7 @@ Ptr<GenericDescriptorMatch> createGenericDescriptorMatch( const string& genericD
     }
     else if( ! genericDescritptorMatchType.compare("FERN") )
     {
-        FernDescriptorMatch::Params params;
-        params.signatureSize = numeric_limits<int>::max();
-        descriptorMatch = new FernDescriptorMatch (params);
+        descriptorMatch = new FernDescriptorMatch();
     }
     else if( ! genericDescritptorMatchType.compare ("CALONDER") )
     {

modules/features2d/src/planardetect.cpp

@@ -805,7 +805,7 @@ void FernClassifier::prepare(int _nclasses, int _patchSize, int _signatureSize,
     patchSize = Size(_patchSize, _patchSize);
     nstructs = _nstructs;
     structSize = _structSize;
-    signatureSize = std::min(_signatureSize, nclasses);
+    signatureSize = _compressionMethod == COMPRESSION_NONE ? nclasses : std::min(_signatureSize, nclasses);
     compressionMethod = signatureSize == nclasses ? COMPRESSION_NONE : _compressionMethod;
 
     leavesPerStruct = 1 << structSize;