Update doc and method String getDefaultName()

modules/face/include/opencv2/face/facerec.hpp

@@ -151,7 +151,7 @@ public:
 
     /**
     @param radius The radius used for building the Circular Local Binary Pattern. The greater the
-    radius, the
+    radius, the smoother the image but more spatial information you can get.
     @param neighbors The number of sample points to build a Circular Local Binary Pattern from. An
     appropriate value is to use `8` sample points. Keep in mind: the more sample points you include,
     the higher the computational cost.

modules/face/src/eigen_faces.cpp

@@ -47,6 +47,10 @@ public:
 
     // Send all predict results to caller side for custom result handling
     void predict(InputArray src, Ptr<PredictCollector> collector) const;
+    String getDefaultName() const
+    {
+        return "opencv_eigenfaces";
+    }
 };
 
 //------------------------------------------------------------------------------

modules/face/src/fisher_faces.cpp

@@ -42,6 +42,10 @@ public:
 
     // Send all predict results to caller side for custom result handling
     void predict(InputArray src, Ptr<PredictCollector> collector) const;
+    String getDefaultName() const
+    {
+        return "opencv_fisherfaces";
+    }
 };
 
 // Removes duplicate elements in a given vector.

modules/face/src/lbph_faces.cpp

@@ -103,6 +103,10 @@ public:
     bool empty() const {
         return (_labels.empty());
     }
+    String getDefaultName() const
+    {
+        return "opencv_lbphfaces";
+    }
 
     CV_IMPL_PROPERTY(int, GridX, _grid_x)
     CV_IMPL_PROPERTY(int, GridY, _grid_y)