我对 cmake 并不满意，但是您似乎无法链接imwrite()函数.

I am not best on cmake, but you appear to have failed to link the imwrite() function.

我在Mac上，因此如果您在其他地方，则情况会有所不同，但是如果您在OpenCV库目录中查找，尤其是在libopencv_imgcodecs.dylib中，如下所示:

I'm on a Mac so this will be different if you are elsewhere, but if you look in the OpenCV libraries directory, specifically in libopencv_imgcodecs.dylib like this:

nm -gUP  libopencv_imgcodecs.dylib | grep -i write

您将看到类似的内容:

__ZN2cv7imwriteERKNS_6StringERKNS_11_InputArrayERKNSt3__16vector...

这意味着imgcodecs提供了您需要的功能.

That means that imgcodecs provides the function you need.

我希望(感谢@ Ptaq666)能可靠地告知添加该库的***方法是使用:

I am, I hope (thanks to @Ptaq666), reliably informed that the best way of adding this library will be to use:

find_package(OpenCV 3 REQUIRED)

其次:

target_link_libraries(<as you already have> ${OpenCV_LIBRARIES})

原始建议

这意味着imgcodecs提供了您需要的功能，因此我认为您需要将其添加到CMakeLists.txt的此行中:

That means that imgcodecs provides the function you need, so I think you need to add that into this line in your CMakeLists.txt:

find_package(OpenCV 3 COMPONENTS core highgui imgproc REQUIRED)

我想那应该是这样的:

find_package(OpenCV 3 COMPONENTS core highgui imgproc imgcodecs REQUIRED)