Merge pull request #2752 from berak:phase_unwrapping_input_type

Author: alalek

modules/phase_unwrapping/include/opencv2/phase_unwrapping/phase_unwrapping.hpp

@@ -58,9 +58,9 @@ class CV_EXPORTS_W PhaseUnwrapping : public virtual Algorithm
     /**
      * @brief Unwraps a 2D phase map.
 
-     * @param wrappedPhaseMap The wrapped phase map that needs to be unwrapped.
+     * @param wrappedPhaseMap The wrapped phase map of type CV_32FC1 that needs to be unwrapped.
      * @param unwrappedPhaseMap The unwrapped phase map.
-     * @param shadowMask Optional parameter used when some pixels do not hold any phase information in the wrapped phase map.
+     * @param shadowMask Optional CV_8UC1 mask image used when some pixels do not hold any phase information in the wrapped phase map.
      */
     CV_WRAP
     virtual void unwrapPhaseMap( InputArray wrappedPhaseMap, OutputArray unwrappedPhaseMap,

modules/phase_unwrapping/src/histogramphaseunwrapping.cpp

@@ -402,6 +402,9 @@ void HistogramPhaseUnwrapping_Impl::unwrapPhaseMap( InputArray wrappedPhaseMap,
         temp.copyTo(mask);
     }
 
+    CV_CheckTypeEQ(wPhaseMap.type(), CV_32FC1, "");
+    CV_CheckTypeEQ(mask.type(), CV_8UC1, "");
+
     computePixelsReliability(wPhaseMap, mask);
     computeEdgesReliabilityAndCreateHistogram();