Merge pull request #3099 from f-morozov:akaze_tutorial

diff --cc modules/features2d/doc/feature_detection_and_description.rst
index ab7cdec,79e37d7..de024a4
--- 1/modules/features2d/doc/feature_detection_and_description.rst
--- 2/modules/features2d/doc/feature_detection_and_description.rst
+++ b/modules/features2d/doc/feature_detection_and_description.rst
@@@ -243,10 -312,3 +243,10 @@@ The AKAZE constructo
      :param octaves: Maximum octave evolution of the image
      :param sublevels: Default number of sublevels per scale level
      :param diffusivity: Diffusivity type. DIFF_PM_G1, DIFF_PM_G2, DIFF_WEICKERT or DIFF_CHARBONNIER
- The SIFT algorithm has been moved to opencv_contrib/xfeatures2d module.
 +
 +SIFT
 +----
 +
 +.. ocv:class:: SIFT : public Feature2D
 +
++The SIFT algorithm has been moved to opencv_contrib/xfeatures2d module.

diff --cc modules/features2d/src/features2d_init.cpp
Simple merge