diff --git a/modules/features2d/include/opencv2/features2d.hpp b/modules/features2d/include/opencv2/features2d.hpp
index 1ba9f9b90240..1f0a92c18839 100644
--- a/modules/features2d/include/opencv2/features2d.hpp
+++ b/modules/features2d/include/opencv2/features2d.hpp
@@ -1404,15 +1404,15 @@ CV_EXPORTS_W void drawKeypoints( const Mat& image, const std::vector<KeyPoint>&
                                const Scalar& color=Scalar::all(-1), int flags=DrawMatchesFlags::DEFAULT );
 
 // Draws matches of keypints from two images on output image.
-CV_EXPORTS void drawMatches( const Mat& img1, const std::vector<KeyPoint>& keypoints1,
+CV_EXPORTS_W void drawMatches( const Mat& img1, const std::vector<KeyPoint>& keypoints1,
                              const Mat& img2, const std::vector<KeyPoint>& keypoints2,
-                             const std::vector<DMatch>& matches1to2, Mat& outImg,
+                             const std::vector<DMatch>& matches1to2, CV_OUT Mat& outImg,
                              const Scalar& matchColor=Scalar::all(-1), const Scalar& singlePointColor=Scalar::all(-1),
                              const std::vector<char>& matchesMask=std::vector<char>(), int flags=DrawMatchesFlags::DEFAULT );
 
-CV_EXPORTS void drawMatches( const Mat& img1, const std::vector<KeyPoint>& keypoints1,
+CV_EXPORTS_AS(drawMatchesKnn) void drawMatches( const Mat& img1, const std::vector<KeyPoint>& keypoints1,
                              const Mat& img2, const std::vector<KeyPoint>& keypoints2,
-                             const std::vector<std::vector<DMatch> >& matches1to2, Mat& outImg,
+                             const std::vector<std::vector<DMatch> >& matches1to2, CV_OUT Mat& outImg,
                              const Scalar& matchColor=Scalar::all(-1), const Scalar& singlePointColor=Scalar::all(-1),
                              const std::vector<std::vector<char> >& matchesMask=std::vector<std::vector<char> >(), int flags=DrawMatchesFlags::DEFAULT );
 
diff --git a/modules/python/src2/cv2.cpp b/modules/python/src2/cv2.cpp
index e68da59cf842..43fd5369502b 100644
--- a/modules/python/src2/cv2.cpp
+++ b/modules/python/src2/cv2.cpp
@@ -97,6 +97,7 @@ using namespace cv;
 typedef cv::softcascade::ChannelFeatureBuilder softcascade_ChannelFeatureBuilder;
 
 typedef std::vector<uchar> vector_uchar;
+typedef std::vector<char> vector_char;
 typedef std::vector<int> vector_int;
 typedef std::vector<float> vector_float;
 typedef std::vector<double> vector_double;
@@ -112,6 +113,8 @@ typedef std::vector<KeyPoint> vector_KeyPoint;
 typedef std::vector<Mat> vector_Mat;
 typedef std::vector<DMatch> vector_DMatch;
 typedef std::vector<String> vector_String;
+
+typedef std::vector<std::vector<char> > vector_vector_char;
 typedef std::vector<std::vector<Point> > vector_vector_Point;
 typedef std::vector<std::vector<Point2f> > vector_vector_Point2f;
 typedef std::vector<std::vector<Point3f> > vector_vector_Point3f;
@@ -830,7 +833,7 @@ template<typename _Tp> struct pyopencvVecConverter
     }
 };
 
-template <typename _Tp>
+template<typename _Tp>
 bool pyopencv_to(PyObject* obj, std::vector<_Tp>& value, const ArgInfo info)
 {
     return pyopencvVecConverter<_Tp>::to(obj, value, info);
@@ -888,9 +891,9 @@ template<typename _Tp> static inline PyObject* pyopencv_from_generic_vec(const s
 
 template<typename _Tp> struct pyopencvVecConverter<std::vector<_Tp> >
 {
-    static bool to(PyObject* obj, std::vector<std::vector<_Tp> >& value, const char* name="<unknown>")
+    static bool to(PyObject* obj, std::vector<std::vector<_Tp> >& value, const ArgInfo info)
     {
-        return pyopencv_to_generic_vec(obj, value, name);
+        return pyopencv_to_generic_vec(obj, value, info);
     }
 
     static PyObject* from(const std::vector<std::vector<_Tp> >& value)