cmakelist 파일을 다음과 같이 수정하십시오.
cmake_minimum_required(VERSION 3.17)
project(untitled)
set(CMAKE_CXX_STANDARD 14)
find_package( OpenCV REQUIRED )
include_directories(${OpenCV_INCLUDE_DIRS})
add_executable(untitled main.cpp)
target_link_libraries(untitled ${OpenCV_LIBS} )