Merge pull request #3229 from AleksandrPanov:add_Dictionary_bindings

* add Dictionary bindings

* add python tests

Author: Alexander Panov

modules/aruco/include/opencv2/aruco/dictionary.hpp

@@ -117,13 +117,13 @@ class CV_EXPORTS_W Dictionary {
      * @brief Given a matrix of bits. Returns whether if marker is identified or not.
      * It returns by reference the correct id (if any) and the correct rotation
      */
-    bool identify(const Mat &onlyBits, int &idx, int &rotation, double maxCorrectionRate) const;
+    CV_WRAP bool identify(const Mat &onlyBits, CV_OUT int &idx, CV_OUT int &rotation, double maxCorrectionRate) const;
 
     /**
       * @brief Returns the distance of the input bits to the specific id. If allRotations is true,
       * the four posible bits rotation are considered
       */
-    int getDistanceToId(InputArray bits, int id, bool allRotations = true) const;
+    CV_WRAP int getDistanceToId(InputArray bits, int id, bool allRotations = true) const;
 
 
     /**

modules/aruco/misc/python/test/test_aruco.py

@@ -64,6 +64,26 @@ def test_write_read_dict(self):
             if os.path.exists(filename):
                 os.remove(filename)
 
+    def test_identify(self):
+        aruco_dict = cv.aruco.Dictionary_get(cv.aruco.DICT_4X4_50)
+        expected_idx = 9
+        expected_rotation = 2
+        bit_marker = np.array([[0, 1, 1, 0], [1, 0, 1, 0], [1, 1, 1, 1], [0, 0, 1, 1]], dtype=np.uint8)
+
+        check, idx, rotation = aruco_dict.identify(bit_marker, 0)
+
+        self.assertTrue(check, True)
+        self.assertEqual(idx, expected_idx)
+        self.assertEqual(rotation, expected_rotation)
+
+    def test_getDistanceToId(self):
+        aruco_dict = cv.aruco.Dictionary_get(cv.aruco.DICT_4X4_50)
+        idx = 7
+        rotation = 3
+        bit_marker = np.array([[0, 1, 0, 1], [0, 1, 1, 1], [1, 1, 0, 0], [0, 1, 0, 0]], dtype=np.uint8)
+        dist = aruco_dict.getDistanceToId(bit_marker, idx)
+
+        self.assertEqual(dist, 0)
 
 if __name__ == '__main__':
     NewOpenCVTests.bootstrap()