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_detect.cpp

@@ -6,13 +6,16 @@
 
 #include "opencv2/imgproc.hpp"
 #include "opencv2/core.hpp"
+#ifdef HAVE_OPENCV_DNN
 #include "opencv2/dnn.hpp"
+#endif
 
 #include <algorithm>
 
 namespace cv
 {
 
+#ifdef HAVE_OPENCV_DNN
 class FaceDetectorYNImpl : public FaceDetectorYN
 {
 public:
@@ -273,6 +276,7 @@ private:
 
     std::vector<Rect2f> priors;
 };
+#endif
 
 Ptr<FaceDetectorYN> FaceDetectorYN::create(const String& model,
                                            const String& config,
@@ -283,7 +287,12 @@ Ptr<FaceDetectorYN> FaceDetectorYN::create(const String& model,
                                            const int backend_id,
                                            const int target_id)
 {
+#ifdef HAVE_OPENCV_DNN
     return makePtr<FaceDetectorYNImpl>(model, config, input_size, score_threshold, nms_threshold, top_k, backend_id, target_id);
+#else
+    CV_UNUSED(model); CV_UNUSED(config); CV_UNUSED(input_size); CV_UNUSED(score_threshold); CV_UNUSED(nms_threshold); CV_UNUSED(top_k); CV_UNUSED(backend_id); CV_UNUSED(target_id);
+    CV_Error(cv::Error::StsNotImplemented, "cv::FaceDetectorYN requires enabled 'dnn' module.");
+#endif
 }
 
 } // namespace cv