diff --git a/modules/ccalib/include/opencv2/multiCameraCalibration.hpp b/modules/ccalib/include/opencv2/multiCameraCalibration.hpp
index fc6ad0e8d..850ffbcc8 100644
--- a/modules/ccalib/include/opencv2/multiCameraCalibration.hpp
+++ b/modules/ccalib/include/opencv2/multiCameraCalibration.hpp
@@ -46,8 +46,15 @@
 #include "opencv2/omnidir.hpp"
 #include <string>
 #include <iostream>
+
+/** @defgroup mulcalib Multiple cameras calibration toolbox
+*/
+
 using namespace cv;
 
+//! @addtogroup mulcalib
+//! @{
+
 #define HEAD -1
 #define INVALID -2
 
@@ -200,4 +207,5 @@ private:
     std::vector<std::vector<Mat> > _omEachCamera, _tEachCamera;
 };
 
+//! @}
 #endif
\ No newline at end of file
diff --git a/modules/ccalib/include/opencv2/omnidir.hpp b/modules/ccalib/include/opencv2/omnidir.hpp
index 3298bb04b..4d0ad9f6b 100644
--- a/modules/ccalib/include/opencv2/omnidir.hpp
+++ b/modules/ccalib/include/opencv2/omnidir.hpp
@@ -41,10 +41,15 @@
 #ifndef __OPENCV_OMNIDIR_HPP__
 #define __OPENCV_OMNIDIR_HPP__
 
+/** @defgroup omnidir Omnidirectional camera calibration
+*/
 namespace cv
 {
 namespace omnidir
 {
+    //! @addtogroup omnidir
+    //! @{
+
     enum {
         CALIB_USE_GUESS             = 1,
         CALIB_FIX_SKEW              = 2,
@@ -221,9 +226,12 @@ namespace omnidir
     @param numDisparities The parameter 'numDisparities' in StereoSGBM, see StereoSGBM for details.
     @param SADWindowSize The parameter 'SADWindowSize' in StereoSGBM, see StereoSGBM for details.
     @param disparity Disparity map generated by stereo matching
-    @param pointCloud Point cloud of 3D reconstruction, with type CV_64FC3
+    @param image1Rec Rectified image of the first image
+    @param image2Rec rectified image of the second image
     @param newSize Image size of rectified image, see omnidir::undistortImage
     @param Knew New camera matrix of rectified image, see omnidir::undistortImage
+    @param pointCloud Point cloud of 3D reconstruction, with type CV_64FC3
+    @param pointType Point cloud type, it can be XYZRGB or XYZ
     */
     CV_EXPORTS_W void stereoReconstruct(InputArray image1, InputArray image2, InputArray K1, InputArray D1, InputArray xi1,
         InputArray K2, InputArray D2, InputArray xi2, InputArray R, InputArray T, int flag, int numDisparities, int SADWindowSize,
@@ -293,6 +301,7 @@ namespace internal
     //void dAB(InputArray A, InputArray B, OutputArray dABdA, OutputArray dABdB);
 } // internal
 
+//! @}
 
 } // omnidir
 
diff --git a/modules/ccalib/include/opencv2/randomPatten.hpp b/modules/ccalib/include/opencv2/randomPatten.hpp
index 0e7297f8e..9d76ab261 100644
--- a/modules/ccalib/include/opencv2/randomPatten.hpp
+++ b/modules/ccalib/include/opencv2/randomPatten.hpp
@@ -45,6 +45,9 @@
 #include "opencv2/features2d.hpp"
 #include "opencv2/highgui.hpp"
 
+/** @defgroup ranPattern Random pattern calibration pattern
+*/
+
 using namespace cv;
 /** @brief Class for finding features points and corresponding 3D in world coordinate of
 a "random" pattern, which can be to be used in calibration. It is useful when pattern is
@@ -56,6 +59,10 @@ Please refer to paper
     Calibration Toolbox Using A Feature Descriptor-Based Calibration
     Pattern", in IROS 2013.
 */
+
+//! @addtogroup ranPattern
+//! @{
+
 class CV_EXPORTS randomPatternCornerFinder
 {
 public:
@@ -164,5 +171,6 @@ private:
     int _imageWidth, _imageHeight;
 };
 
+//! @}
 
 #endif
\ No newline at end of file
diff --git a/modules/ccalib/src/omnidir.cpp b/modules/ccalib/src/omnidir.cpp
index d6951095f..b4bda4ff7 100644
--- a/modules/ccalib/src/omnidir.cpp
+++ b/modules/ccalib/src/omnidir.cpp
@@ -764,7 +764,7 @@ void cv::omnidir::internal::initializeStereoCalibration(InputOutputArrayOfArrays
     const Size& size1, const Size& size2, OutputArray om, OutputArray T, OutputArrayOfArrays omL, OutputArrayOfArrays tL, OutputArray K1, OutputArray D1, OutputArray K2, OutputArray D2,
     double &xi1, double &xi2, int flags, OutputArray idx)
 {
-    int n = objectPoints.total();
+    int n = (int)objectPoints.total();
     Mat idx1, idx2;
     Matx33d _K1, _K2;
     Matx14d _D1, _D2;
@@ -1620,15 +1620,13 @@ void cv::omnidir::stereoReconstruct(InputArray image1, InputArray image2, InputA
                 }
             }
         }
-        int nPoints = 0;
+
         if (pointType == XYZ)
         {
-            nPoints = (int)_pointCloud.size();
             Mat(_pointCloud).convertTo(pointCloud, CV_MAKE_TYPE(CV_32F, 3));
         }
         else if (pointType == XYZRGB)
         {
-            nPoints = (int)_pointCloudColor.size();
             Mat(_pointCloudColor).convertTo(pointCloud, CV_MAKE_TYPE(CV_32F, 6));
         }
     }