python: use '((x,y), (w,h), angle)' in std::vector<RotatedRect>

modules/python/src2/cv2.cpp

@@ -518,6 +518,10 @@ template <class T>
 struct IsRepresentableAsMatDataType<T, typename VoidType<typename DataType<T>::channel_type>::type> : TrueType
 {
 };
+
+// https://github.com/opencv/opencv/issues/20930
+template <> struct IsRepresentableAsMatDataType<RotatedRect, void> : FalseType {};
+
 } // namespace traits
 
 typedef std::vector<uchar> vector_uchar;

modules/python/test/test_misc.py

@@ -583,6 +583,18 @@ class Arguments(NewOpenCVTests):
         self.assertEqual(ints.dtype, np.int32, "Vector of integers has wrong elements type")
         self.assertEqual(ints.shape, expected_shape, "Vector of integers has wrong shape.")
 
+    def test_result_rotated_rect_issue_20930(self):
+        rr = cv.utils.testRotatedRect(10, 20, 100, 200, 45)
+        self.assertTrue(isinstance(rr, tuple), msg=type(rr))
+        self.assertEqual(len(rr), 3)
+
+        rrv = cv.utils.testRotatedRectVector(10, 20, 100, 200, 45)
+        self.assertTrue(isinstance(rrv, tuple), msg=type(rrv))
+        self.assertEqual(len(rrv), 10)
+
+        rr = rrv[0]
+        self.assertTrue(isinstance(rr, tuple), msg=type(rrv))
+        self.assertEqual(len(rr), 3)
 
 class SamplesFindFile(NewOpenCVTests):