Added descriptions of randu and randn

modules/core/include/opencv2/core/matx.hpp

@@ -151,7 +151,16 @@ public:
     static Matx ones();
     static Matx eye();
     static Matx diag(const diag_type& d);
+    /** @brief Generates uniformly distributed random numbers
+    @param a Range boundary.
+    @param b The other range boundary (boundaries don't have to be ordered, the lower boundary is inclusive,
+    the upper one is exclusive).
+     */
     static Matx randu(_Tp a, _Tp b);
+    /** @brief Generates normally distributed random numbers
+    @param a Mean value.
+    @param b Standard deviation.
+     */
     static Matx randn(_Tp a, _Tp b);
 
     //! dot product computed with the default precision