diff --git a/modules/imgproc/doc/structural_analysis_and_shape_descriptors.rst b/modules/imgproc/doc/structural_analysis_and_shape_descriptors.rst
index acd6cbc0f..84f80a30f 100644
--- a/modules/imgproc/doc/structural_analysis_and_shape_descriptors.rst
+++ b/modules/imgproc/doc/structural_analysis_and_shape_descriptors.rst
@@ -392,11 +392,11 @@ that has
 *O(N logN)* complexity in the current implementation. See the OpenCV sample ``convexhull.cpp`` that demonstrates the usage of different function variants.
 
 
-ConvexityDefects
+convexityDefects
 ----------------
 Finds the convexity defects of a contour.
 
-.. ocv:function:: void convexityDefects( InputArray points, InputArray convexhull, OutputArray convexityDefects )
+.. ocv:function:: void convexityDefects( InputArray contour, InputArray convexhull, OutputArray convexityDefects )
 
 .. ocv:pyfunction:: cv2.ConvexityDefects(contour, convexhull)-> convexityDefects
 
diff --git a/modules/imgproc/include/opencv2/imgproc/imgproc.hpp b/modules/imgproc/include/opencv2/imgproc/imgproc.hpp
index 0cc8bbe39..b2e1ea86a 100644
--- a/modules/imgproc/include/opencv2/imgproc/imgproc.hpp
+++ b/modules/imgproc/include/opencv2/imgproc/imgproc.hpp
@@ -1030,9 +1030,9 @@ CV_EXPORTS_W double matchShapes( InputArray contour1, InputArray contour2,
 CV_EXPORTS_W void convexHull( InputArray points, OutputArray hull,
                               bool clockwise=false, bool returnPoints=true );
 //! computes the contour convexity defects
-CV_EXPORTS_W void convexityDefects( InputArray points, InputArray hull, OutputArray defects );
+CV_EXPORTS_W void convexityDefects( InputArray contour, InputArray convexhull, OutputArray convexityDefects );
 
-//! returns true iff the contour is convex. Does not support contours with self-intersection
+//! returns true if the contour is convex. Does not support contours with self-intersection
 CV_EXPORTS_W bool isContourConvex( InputArray contour );
 
 //! finds intersection of two convex polygons