您应使用 CMAKE_CURRENT_SOURCE_DIR 指定此目录.您还应该在此处添加 $ {OpenCV_INCLUDE_DIRS} ，如在CMake中使用OpenCV"

You should use target_include_directories() to tell CMake to associate specific include directories containing your headers with the DisplayImage target. Assuming your Camera.h file is in the same directory as Camera.cpp, you can use CMAKE_CURRENT_SOURCE_DIR to specify this directory. You should also add the ${OpenCV_INCLUDE_DIRS} here, as shown in the "Using OpenCV with CMake" tutorial.

cmake_minimum_required(VERSION 2.8)
project( DisplayImage )
find_package( OpenCV REQUIRED )
add_executable( DisplayImage DisplayImage.cpp Camera.cpp )
target_include_directories(DisplayImage PRIVATE 
    ${CMAKE_CURRENT_SOURCE_DIR} 
    ${OpenCV_INCLUDE_DIRS}
)
target_link_libraries( DisplayImage PRIVATE ${OpenCV_LIBS} )

注意:总是 指定作用域参数(例如 PUBLIC ， PRIVATE 或 INTERFACE 代码>)中的 target _ * 命令.

Note: it is good CMake practice to always specify the scoping argument (e.g. PUBLIC, PRIVATE, or INTERFACE) in the target_* commands.