我用的是github下的opencv4.5.1的源码自己编译的,在win10上用vscode搭建的开发环境,一切正常.
附上cmake配置文件:

#设置cmake版本
cmake_minimum_required(VERSION 3.15)

#项目名字
project(main)

#设置编译版本
set(CMAKE_CXX_STANDARD 14)

#设置头文件路径
set(INC_DIR
    D:/Opengl/opencv/include
    D:/Opengl/opencv/include/opencv2
    D:/Gitee/games101/include/eigen
    D:/Gitee/games101/include/utils
)

#设置链接库路径
set(LINK_DIR
    D:/Opengl/opencv/x64/mingw/bin
    D:/Opengl/opencv/x64/mingw/lib
)

set(LINK_LIB
    libopencv_core451
    libopencv_highgui451
    libopencv_imgproc451
    libopencv_imgcodecs451
    libopencv_video451
    libopencv_ml451
    libopencv_highgui451
    libopencv_objdetect451
    libopencv_flann451
    libopencv_imgcodecs451
    libopencv_photo451
    libopencv_videoio451
)

#设源代码路径
set(SRC_DIR
    main.cpp
    rasterizer.hpp
    rasterizer.cpp
    Triangle.hpp
    Triangle.cpp
)

#引入头文件
include_directories(${INC_DIR})

#引入库文件
link_directories(${LINK_DIR})

#编译文件
add_executable(${PROJECT_NAME} ${SRC_DIR})

#将第三方库连接在一起
target_link_libraries(${PROJECT_NAME} ${LINK_LIB})