Merge remote-tracking branch 'upstream/3.4' into merge-3.4

Author: alalek

modules/ximgproc/include/opencv2/ximgproc/lsc.hpp

@@ -126,7 +126,7 @@ class CV_EXPORTS_W SuperpixelLSC : public Algorithm
     The function merge component that is too small, assigning the previously found adjacent label
     to this component. Calling this function may change the final number of superpixels.
      */
-    CV_WRAP virtual void enforceLabelConnectivity( int min_element_size = 20 ) = 0;
+    CV_WRAP virtual void enforceLabelConnectivity( int min_element_size = 25 ) = 0;
 
 
 };