add compatibility with opencv 4.1.1

CMakeLists.txt

@@ -90,22 +90,20 @@ if(ENABLE_OPENCV)
       if(TARGET opencv_video)
         list(APPEND OpenCV_LINKED_COMPONENTS "opencv_video")
       endif()
-      if(OpenCV_VERSION VERSION_LESS "4.0")
+      if(TARGET opencv_videoio)
-        if(TARGET opencv_videoio)
+        list(APPEND OpenCV_LINKED_COMPONENTS "opencv_videoio")
-          list(APPEND OpenCV_LINKED_COMPONENTS "opencv_videoio")
+      endif()
-        endif()
+      if(TARGET opencv_highgui)
-        if(TARGET opencv_highgui)
+        list(APPEND OpenCV_LINKED_COMPONENTS "opencv_highgui")
-          list(APPEND OpenCV_LINKED_COMPONENTS "opencv_highgui")
+      endif()
-        endif()
+      if(TARGET opencv_imgproc)
-        if(TARGET opencv_imgproc)
+        list(APPEND OpenCV_LINKED_COMPONENTS "opencv_imgproc")
-          list(APPEND OpenCV_LINKED_COMPONENTS "opencv_imgproc")
+      endif()
-        endif()
+      if(TARGET opencv_imgcodecs)
-        if(TARGET opencv_imgcodecs)
+        list(APPEND OpenCV_LINKED_COMPONENTS "opencv_imgcodecs")
-          list(APPEND OpenCV_LINKED_COMPONENTS "opencv_imgcodecs")
+      endif()
-        endif()
+      if(TARGET opencv_core)
-        if(TARGET opencv_core)
+        list(APPEND OpenCV_LINKED_COMPONENTS "opencv_core")
-          list(APPEND OpenCV_LINKED_COMPONENTS "opencv_core")
-        endif()
       endif()
     endif()
   endif()