Minor fix about OpenCV (#1182)

* Update Document OpenCV Version

Azure Kinect Sensor SDK v1.4.0 and later has been tested with OpenCV 4.1.1.

* Remove unnecessary settings from CMakeLists

It is not necessary because settings of include directory for OpenCV is done with OpenCV_LIBS. It is redundant.

examples/green_screen/CMakeLists.txt

@@ -1,5 +1,4 @@
 # Copyright (c) Microsoft Corporation. All rights reserved.
 # Licensed under the MIT License.
 add_executable(green_screen main.cpp)
-target_include_directories( green_screen PRIVATE ${OpenCV_INCLUDE_DIRS} )
 target_link_libraries(green_screen PRIVATE k4a::k4a ${OpenCV_LIBS})

examples/opencv_compatibility/CMakeLists.txt

@@ -2,5 +2,4 @@
 # Licensed under the MIT License.
 
 add_executable(opencv_example main.cpp)
-target_include_directories( opencv_example PRIVATE ${OpenCV_INCLUDE_DIRS} )
 target_link_libraries(opencv_example PRIVATE k4a::k4a ${OpenCV_LIBS})

examples/opencv_compatibility/README.md

@@ -8,7 +8,7 @@ camera into pixel-coordinates of the depth camera. We then show how the same ope
 OpenCV function projectPoints().
 
 If the user has OpenCV installed, the OpenCV-specific code can be enabled by uncommenting the HAVE_OPENCV pound define. The 
-OpenCV code has been tested using OpenCV 4.0.1.
+OpenCV code has been tested using OpenCV 4.1.1.
 
 ## Usage Info