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You can add CV_EXPORTS to class definitions in modules/imgproc/src/filterengine.hpp (e.g., class CV_EXPORTS BaseRowFilter) then compile/install openCV from scratch again. After that, copy the same filterengine.hpp to your project and include it. Everything should compile and link fine from that point. In the default case without CV_EXPORTS those classes are not made external in the output openCV shared libs.