python: add support for NMSBoxes

modules/dnn/include/opencv2/dnn/dnn.hpp

@@ -900,7 +900,7 @@ CV__DNN_EXPERIMENTAL_NS_BEGIN
                                CV_OUT std::vector<int>& indices,
                                const float eta = 1.f, const int top_k = 0);
 
-    CV_EXPORTS void NMSBoxes(const std::vector<RotatedRect>& bboxes, const std::vector<float>& scores,
+    CV_EXPORTS_AS(NMSBoxesRotated) void NMSBoxes(const std::vector<RotatedRect>& bboxes, const std::vector<float>& scores,
                              const float score_threshold, const float nms_threshold,
                              CV_OUT std::vector<int>& indices,
                              const float eta = 1.f, const int top_k = 0);

modules/python/src2/cv2.cpp

@@ -119,6 +119,7 @@ typedef std::vector<Vec6f> vector_Vec6f;
 typedef std::vector<Vec4i> vector_Vec4i;
 typedef std::vector<Rect> vector_Rect;
 typedef std::vector<Rect2d> vector_Rect2d;
+typedef std::vector<RotatedRect> vector_RotatedRect;
 typedef std::vector<KeyPoint> vector_KeyPoint;
 typedef std::vector<Mat> vector_Mat;
 typedef std::vector<std::vector<Mat> > vector_vector_Mat;
@@ -1520,6 +1521,18 @@ template<> struct pyopencvVecConverter<String>
     }
 };
 
+template<> struct pyopencvVecConverter<RotatedRect>
+{
+    static bool to(PyObject* obj, std::vector<RotatedRect>& value, const ArgInfo info)
+    {
+        return pyopencv_to_generic_vec(obj, value, info);
+    }
+    static PyObject* from(const std::vector<RotatedRect>& value)
+    {
+        return pyopencv_from_generic_vec(value);
+    }
+};
+
 template<>
 bool pyopencv_to(PyObject *obj, TermCriteria& dst, const char *name)
 {