Merge pull request #21369 from UnaNancyOwen:fix_uwp

Fix support objdetect module for UWP

* Fix support objdetect module for UWP

* Fix define module for objdetect

* Remove conditional compilation from public headers

* Add StsNotImplemented for FaceDetectorYN/FaceRecognizerSF

* Fix typo error message

* Fix error message

* coding style, eliminate warnings

modules/objdetect/src/face_recognize.cpp

@@ -4,13 +4,17 @@
 
 #include "precomp.hpp"
 
+#include "opencv2/core.hpp"
+#ifdef HAVE_OPENCV_DNN
 #include "opencv2/dnn.hpp"
+#endif
 
 #include <algorithm>
 
 namespace cv
 {
 
+#ifdef HAVE_OPENCV_DNN
 class FaceRecognizerSFImpl : public FaceRecognizerSF
 {
 public:
@@ -173,10 +177,16 @@ private:
 private:
     dnn::Net net;
 };
+#endif
 
 Ptr<FaceRecognizerSF> FaceRecognizerSF::create(const String& model, const String& config, int backend_id, int target_id)
 {
+#ifdef HAVE_OPENCV_DNN
     return makePtr<FaceRecognizerSFImpl>(model, config, backend_id, target_id);
+#else
+    CV_UNUSED(model); CV_UNUSED(config); CV_UNUSED(backend_id); CV_UNUSED(target_id);
+    CV_Error(cv::Error::StsNotImplemented, "cv::FaceRecognizerSF requires enabled 'dnn' module");
+#endif
 }
 
 } // namespace cv