Update comments for cv::InputArray.

modules/core/include/opencv2/core/mat.hpp

@@ -73,8 +73,8 @@ It is defined as:
     typedef const _InputArray& InputArray;
 @endcode
 where _InputArray is a class that can be constructed from `Mat`, `Mat_<T>`, `Matx<T, m, n>`,
-`std::vector<T>`, `std::vector<std::vector<T> >` or `std::vector<Mat>`. It can also be constructed
+`std::vector<T>`, `std::vector<std::vector<T> >`, `std::vector<Mat>`, `std::vector<Mat_<T> >`,
-from a matrix expression.
+`UMat`, `std::vector<UMat>` or `double`. It can also be constructed from a matrix expression.
 
 Since this is mostly implementation-level class, and its interface may change in future versions, we
 do not describe it in details. There are a few key things, though, that should be kept in mind: