Added AKAZE features in the stitcher pipeline (issue #6474)

modules/stitching/include/opencv2/stitching/detail/matchers.hpp

@@ -131,6 +131,27 @@ private:
     Size grid_size;
 };
 
+/** @brief AKAZE features finder. :
+
+@sa detail::FeaturesFinder, AKAZE
+*/
+class CV_EXPORTS AKAZEFeaturesFinder : public detail::FeaturesFinder
+{
+public:
+    AKAZEFeaturesFinder(int descriptor_type = AKAZE::DESCRIPTOR_MLDB,
+                        int descriptor_size = 0,
+                        int descriptor_channels = 3,
+                        float threshold = 0.001f,
+                        int nOctaves = 4,
+                        int nOctaveLayers = 4,
+                        int diffusivity = KAZE::DIFF_PM_G2);
+
+private:
+    void find(InputArray image, detail::ImageFeatures &features);
+
+    Ptr<AKAZE> akaze;
+};
+
 
 #ifdef HAVE_OPENCV_XFEATURES2D
 class CV_EXPORTS SurfFeaturesFinderGpu : public FeaturesFinder