Merge pull request #2920 from shimat:createRLEImage_const

modules/ximgproc/include/opencv2/ximgproc/run_length_morphology.hpp

@@ -94,7 +94,7 @@ CV_EXPORTS bool isRLMorphologyPossible(InputArray rlStructuringElement);
 * @param   size   image size (to be used if an "on" boundary should be used in erosion, using the default
 *                  means that the size is computed from the extension of the input)
 */
-CV_EXPORTS void createRLEImage(std::vector<cv::Point3i>& runs, OutputArray res, Size size = Size(0, 0));
+CV_EXPORTS void createRLEImage(const std::vector<cv::Point3i>& runs, OutputArray res, Size size = Size(0, 0));
 
 /**
 * @brief   Applies a morphological operation to a run-length encoded binary image.

modules/ximgproc/src/run_length_morphology.cpp

@@ -700,13 +700,13 @@ CV_EXPORTS bool isRLMorphologyPossible(InputArray rlStructuringElement)
   return true;
 }
 
-CV_EXPORTS void createRLEImage(std::vector<cv::Point3i>& runs, OutputArray res, Size size)
+CV_EXPORTS void createRLEImage(const std::vector<cv::Point3i>& runs, OutputArray res, Size size)
 {
     size_t nRuns = runs.size();
     rlVec runsConverted(nRuns);
     for (size_t i = 0u; i < nRuns; ++i)
     {
-        Point3i &curIn = runs[i];
+        const Point3i &curIn = runs[i];
         runsConverted[i] = rlType(curIn.x, curIn.y, curIn.z);
     }
     sortChords(runsConverted);