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

modules/imgproc/include/opencv2/imgproc.hpp

@@ -256,6 +256,9 @@ enum InterpolationFlags{
     INTER_LANCZOS4       = 4,
     /** Bit exact bilinear interpolation */
     INTER_LINEAR_EXACT = 5,
+    /** Bit exact nearest neighbor interpolation. This will produce same results as
+    the nearest neighbor method in PIL, scikit-image or Matlab. */
+    INTER_NEAREST_EXACT  = 6,
     /** mask for interpolation codes */
     INTER_MAX            = 7,
     /** flag, fills all of the destination image pixels. If some of them correspond to outliers in the