c++: opencv测试，可以运行但是终端输出信息加载 *dll 失败

Question

[ INFO:0@0.363] global c:\build\master_winpack-build-win64-vc15\opencv\modules\core\src\parallel\registry_parallel.impl.hpp (96) cv::parallel::ParallelBackendRegistry::ParallelBackendRegistry core(parallel): Enabled backends(3, sorted by priority): ONETBB(1000); TBB(990); OPENMP(980)
[ INFO:0@0.363] global c:\build\master_winpack-build-win64-vc15\opencv\modules\core\src\utils\plugin_loader.impl.hpp (67) cv::plugin::impl::DynamicLib::libraryLoad load G:\opencv--VS2022\opencv\build\x64\vc15\bin\opencv_core_parallel_onetbb455_64d.dll => FAILED
[ INFO:0@0.364] global c:\build\master_winpack-build-win64-vc15\opencv\modules\core\src\utils\plugin_loader.impl.hpp (67) cv::plugin::impl::DynamicLib::libraryLoad load opencv_core_parallel_onetbb455_64d.dll => FAILED
[ INFO:0@0.364] global c:\build\master_winpack-build-win64-vc15\opencv\modules\core\src\utils\plugin_loader.impl.hpp (67) cv::plugin::impl::DynamicLib::libraryLoad load G:\opencv--VS2022\opencv\build\x64\vc15\bin\opencv_core_parallel_tbb455_64d.dll => FAILED
[ INFO:0@0.365] global c:\build\master_winpack-build-win64-vc15\opencv\modules\core\src\utils\plugin_loader.impl.hpp (67) cv::plugin::impl::DynamicLib::libraryLoad load opencv_core_parallel_tbb455_64d.dll => FAILED
[ INFO:0@0.365] global c:\build\master_winpack-build-win64-vc15\opencv\modules\core\src\utils\plugin_loader.impl.hpp (67) cv::plugin::impl::DynamicLib::libraryLoad load G:\opencv--VS2022\opencv\build\x64\vc15\bin\opencv_core_parallel_openmp455_64d.dll => FAILED
[ INFO:0@0.366] global c:\build\master_winpack-build-win64-vc15\opencv\modules\core\src\utils\plugin_loader.impl.hpp (67) cv::plugin::impl::DynamicLib::libraryLoad load opencv_core_parallel_openmp455_64d.dll => FAILED

Answer 1

这是OpenCV加载并行计算的模块插件，你得确定你有这些插件才能加载成功。
如果没有，那么OpenCV就按顺序计算，仍然可以运行，就是运行速度比并行计算的慢些。