undefined reference to `MNN::CV::imread

引用中的代码片段是一个使用MNN库的示例，它并没有直接使用MNN的imread函数，而是使用了OpenCV的imread函数来读取图片。所以在编译过程中出现undefined reference to `MNN::CV::imread的错误，可能是因为你的代码中缺少了对MNN库的链接。你可以尝试在CMakeLists.txt中添加对MNN库的链接，类似于引用中对OpenCV库的链接。具体来说，你可以修改CMakeLists.txt如下：

target_link_libraries(helloworld -lMNN)

这样可以将MNN库链接到你的项目中，解决undefined reference to `MNN::CV::imread的问题。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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