HISTCMP_CORREL only available since OpenCV 3.0 (opencv/opencv#785)

Author: k-okada

CMakeLists.txt

@@ -170,8 +170,10 @@ opencv_apps_add_nodelet(discrete_fourier_transform src/nodelet/discrete_fourier_
   # ./tutorial_code/Histograms_Matching/calcBackProject_Demo1.cpp
   # ./tutorial_code/Histograms_Matching/calcBackProject_Demo2.cpp
   # ./tutorial_code/Histograms_Matching/calcHist_Demo.cpp
+if(OpenCV_VERSION GREATER_LESS "3.0")
   opencv_apps_add_nodelet(compare_histogram src/nodelet/compare_histogram_nodelet.cpp)  #  ./tutorial_code/Histograms_Matching/compareHist_Demo.cpp
-  opencv_apps_add_nodelet(equalize_histogram src/nodelet/equalize_histogram_nodelet.cpp) # ./tutorial_code/Histograms_Matching/EqualizeHist_Demo.cpp
+endif()
+opencv_apps_add_nodelet(equalize_histogram src/nodelet/equalize_histogram_nodelet.cpp) # ./tutorial_code/Histograms_Matching/EqualizeHist_Demo.cpp
   # ./tutorial_code/Histograms_Matching/MatchTemplate_Demo.cpp
 
 # imagecodecs

test/CMakeLists.txt

@@ -56,7 +56,9 @@ add_rostest(test-hls_color_filter.test ARGS gui:=false)
 add_rostest(test-hsv_color_filter.test ARGS gui:=false)
 add_rostest(test-lab_color_filter.test ARGS gui:=false)
 add_rostest(test-edge_detection.test ARGS gui:=false)
-add_rostest(test-compare_histogram.test ARGS gui:=false)
+if(OpenCV_VERSION GREATER_LESS "3.0")
+  add_rostest(test-compare_histogram.test ARGS gui:=false)
+endif()
 add_rostest(test-equalize_histogram.test ARGS gui:=false)
 
 add_rostest(test-hough_lines.test ARGS gui:=false)