# OPENCV package
find_package(OpenCV)
add_library(opencv INTERFACE)
target_include_directories(opencv
        INTERFACE
        ${OpenCV_INCLUDE_DIRS})
target_link_libraries(opencv
        INTERFACE
        ${OpenCV_LIBS})

add_executable(opencv_example example.cpp)

target_link_libraries(opencv_example
    PRIVATE
        opencv
)

# Find OpenCV, you may need to set OpenCV_DIR variable
# to the absolute path to the directory containing OpenCVConfig.cmake file
# via the command line or GUI
find_package(OpenCV REQUIRED)

# Declare the executable target built from your sources
add_executable(opencv_example example.cpp)

# Link your application with OpenCV libraries
target_link_libraries(opencv_example ${OpenCV_LIBS})

...

add_executable(opencv_example example.cpp)

target_link_libraries(opencv_example
    PRIVATE
        opencv::core
        opencv::video
        opencv::imgproc
)

find_package(OpenCV REQUIRED COMPONENTS core imgproc video)

add_executable(opencv_example example.cpp)

target_link_libraries(opencv_example
    PRIVATE
        opencv_core
        opencv_video
        opencv_imgproc
)