Merge pull request #3099 from f-morozov:akaze_tutorial

[profile/ivi/opencv.git] / modules / features2d / doc / feature_detection_and_description.rst

diff --git a/modules/features2d/doc/feature_detection_and_description.rst b/modules/features2d/doc/feature_detection_and_description.rst
index ab7cdec..de024a4 100644 (file)
--- a/modules/features2d/doc/feature_detection_and_description.rst
+++ b/modules/features2d/doc/feature_detection_and_description.rst
@@ -226,7 +226,7 @@ Class implementing the AKAZE keypoint detector and descriptor extractor, describ
                                float threshold = 0.001f, int octaves = 4, int sublevels = 4, int diffusivity = DIFF_PM_G2);
     };
 
-.. note:: AKAZE descriptor can only be used with KAZE or AKAZE keypoints
+.. note:: AKAZE descriptors can only be used with KAZE or AKAZE keypoints. Try to avoid using *extract* and *detect* instead of *operator()* due to performance reasons.
 
 .. [ANB13] Fast Explicit Diffusion for Accelerated Features in Nonlinear Scale Spaces. Pablo F. Alcantarilla, Jesús Nuevo and Adrien Bartoli. In British Machine Vision Conference (BMVC), Bristol, UK, September 2013.
 
@@ -249,4 +249,4 @@ SIFT
 
 .. ocv:class:: SIFT : public Feature2D
 
-The SIFT algorithm has been moved to opencv_contrib/xfeatures2d module.
\ No newline at end of file
+The SIFT algorithm has been moved to opencv_contrib/xfeatures2d module.