Fix documentation warnings

modules/features2d/doc/feature_detection_and_description.rst

@@ -267,15 +267,15 @@ Class implementing the KAZE keypoint detector and descriptor extractor, describe
         };
 
         CV_WRAP KAZE();
-        explicit KAZE(DESCRIPTOR_TYPE descriptor_type, bool _extended, bool _upright);
+        explicit KAZE(DESCRIPTOR_TYPE descriptor_type, bool extended, bool upright);
 
         ....
     };
 
+KAZE::KAZE
+--------
 The KAZE constructor
 
-.. ocv:function:: KAZE::KAZE()
-
 .. ocv:function:: KAZE::KAZE(DESCRIPTOR_TYPE descriptor_type, bool extended, bool upright)
 
     :param descriptor_type: Type of the extracted descriptor.
@@ -304,15 +304,15 @@ Class implementing the AKAZE keypoint detector and descriptor extractor, describ
         };
 
         CV_WRAP AKAZE();
-        explicit AKAZE(DESCRIPTOR_TYPE descriptor_type, int _descriptor_size = 0, int _descriptor_channels = 3);
+        explicit AKAZE(DESCRIPTOR_TYPE descriptor_type, int descriptor_size = 0, int descriptor_channels = 3);
 
         ...
     };
 
+AKAZE::AKAZE
+--------
 The AKAZE constructor
 
-.. ocv:function:: AKAZE::AKAZE()
-
 .. ocv:function:: AKAZE::AKAZE(DESCRIPTOR_TYPE descriptor_type, int descriptor_size = 0, int descriptor_channels = 3)
 
     :param descriptor_type: Type of the extracted descriptor.