tracking: make opencv_dnn dependancy optional

modules/tracking/CMakeLists.txt

 set(the_description "Tracking API")
-ocv_define_module(tracking opencv_imgproc opencv_core opencv_video opencv_highgui opencv_dnn opencv_plot OPTIONAL opencv_datasets WRAP java python)
+ocv_define_module(tracking opencv_imgproc opencv_core opencv_video opencv_highgui opencv_plot OPTIONAL opencv_dnn opencv_datasets WRAP java python)

modules/tracking/samples/goturnTracker.cpp

@@ -45,6 +45,9 @@
 //1 - Train you own GOTURN model using <https://github.com/Auron-X/GOTURN_Training_Toolkit>
 //2 - Download pretrained caffemodel from <https://github.com/opencv/opencv_extra>
 
+#include "opencv2/opencv_modules.hpp"
+#if defined(HAVE_OPENCV_DNN) && defined(HAVE_OPENCV_DATASETS)
+
 #include "opencv2/datasets/track_alov.hpp"
 #include <opencv2/core/utility.hpp>
 #include <opencv2/tracking.hpp>
@@ -65,8 +68,8 @@ static bool startSelection = false;
 Rect2d boundingBox;
 
 static const char* keys =
-{ "{@dataset_path     |true| Dataset path     }"
-"{@dataset_id     |1| Dataset ID     }"
+{ "{@dataset_path     || Dataset path   }"
+  "{@dataset_id      |1| Dataset ID     }"
 };
 
 static void onMouse(int event, int x, int y, int, void*)
@@ -144,9 +147,14 @@ int main(int argc, char *argv[])
     Ptr<cv::datasets::TRACK_alov> dataset = TRACK_alov::create();
     dataset->load(datasetRootPath);
     dataset->initDataset(datasetID);
-
     //Read first frame
     dataset->getNextFrame(frame);
+    if (frame.empty())
+    {
+        cout << "invalid dataset: " << datasetRootPath << endl;
+        return -2;
+    }
+
     frame.copyTo(image);
     rectangle(image, boundingBox, Scalar(255, 0, 0), 2, 1);
     imshow("GOTURN Tracking", image);
@@ -215,3 +223,11 @@ int main(int argc, char *argv[])
 
     return 0;
 }
+
+#else // ! HAVE_OPENCV_DNN && HAVE_OPENCV_DATASETS
+#include <opencv2/core.hpp>
+int main() {
+    CV_Error(cv::Error::StsNotImplemented , "this sample needs to be built with opencv_datasets and opencv_dnn !");
+    return -1;
+}
+#endif

modules/tracking/samples/multiTracker_dataset.cpp

@@ -234,6 +234,7 @@ int main(int argc, char *argv[])
 }
 
 #else // ! HAVE_OPENCV_DATASETS
+#include <opencv2/core.hpp>
 int main() {
 	CV_Error(cv::Error::StsNotImplemented , "this sample needs to be built with opencv_datasets !");
 	return -1;

modules/tracking/samples/tracker_dataset.cpp

@@ -234,6 +234,7 @@ int main(int argc, char *argv[])
 
 
 #else // ! HAVE_OPENCV_DATASETS
+#include <opencv2/core.hpp>
 int main() {
 	CV_Error(cv::Error::StsNotImplemented , "this sample needs to be built with opencv_datasets !");
 	return -1;

modules/tracking/src/gtrTracker.cpp

@@ -38,7 +38,7 @@
 // the use of this software, even if advised of the possibility of such damage.
 //
 //M*/
-
+#include "opencv2/opencv_modules.hpp"
 #include "gtrTracker.hpp"
 
 
@@ -54,9 +54,16 @@ void TrackerGOTURN::Params::write(cv::FileStorage& /*fs*/) const {}
 
 Ptr<TrackerGOTURN> TrackerGOTURN::createTracker(const TrackerGOTURN::Params &parameters)
 {
+#ifdef HAVE_OPENCV_DNN
     return Ptr<gtr::TrackerGOTURNImpl>(new gtr::TrackerGOTURNImpl(parameters));
+#else
+    (void)(parameters);
+    CV_ErrorNoReturn(cv::Error::StsNotImplemented , "to use GOTURN, the tracking module needs to be built with opencv_dnn !");
+#endif
 }
 
+
+#ifdef HAVE_OPENCV_DNN
 namespace gtr
 {
 
@@ -183,9 +190,11 @@ bool TrackerGOTURNImpl::updateImpl(const Mat& image, Rect2d& boundingBox)
     //Set new model image and BB from current frame
     ((TrackerGOTURNModel*)static_cast<TrackerModel*>(model))->setImage(curFrame);
     ((TrackerGOTURNModel*)static_cast<TrackerModel*>(model))->setBoudingBox(curBB);
+
     return true;
 }
 
 }
+#endif // OPENCV_HAVE_DNN
 
 }

modules/tracking/src/gtrTracker.hpp

@@ -45,11 +45,15 @@
 
 #include "precomp.hpp"
 #include "opencv2/video/tracking.hpp"
-#include "opencv2/dnn.hpp"
 #include "gtrUtils.hpp"
 #include "opencv2/imgproc.hpp"
-#include<algorithm>
-#include<limits.h>
+
+#include <algorithm>
+#include <limits.h>
+
+#include "opencv2/opencv_modules.hpp"
+#ifdef HAVE_OPENCV_DNN
+#include "opencv2/dnn.hpp"
 
 namespace cv
 {
@@ -72,5 +76,5 @@ public:
 
 }
 }
-
+#endif
 #endif

modules/tracking/src/gtrUtils.cpp

@@ -58,7 +58,7 @@ double generateRandomLaplacian(double b, double m)
         return m - b*log(n);
 }
 
-Rect2f anno2rect(vector<Point2f> annoBB)
+Rect2f anno2rect(std::vector<Point2f> annoBB)
 {
     Rect2f rectBB;
     rectBB.x = min(annoBB[0].x, annoBB[1].x);
@@ -69,9 +69,9 @@ Rect2f anno2rect(vector<Point2f> annoBB)
     return rectBB;
 }
 
-vector <TrainingSample> gatherFrameSamples(Mat prevFrame, Mat currFrame, Rect2f prevBB, Rect2f currBB)
+std::vector <TrainingSample> gatherFrameSamples(Mat prevFrame, Mat currFrame, Rect2f prevBB, Rect2f currBB)
 {
-    vector <TrainingSample> trainingSamples;
+    std::vector <TrainingSample> trainingSamples;
     Point2f currCenter, prevCenter;
     Rect2f targetPatchRect, searchPatchRect;
     Mat targetPatch, searchPatch;

modules/tracking/src/gtrUtils.hpp

@@ -4,7 +4,6 @@
 #include "precomp.hpp"
 #include <vector>
 #include "opencv2/highgui.hpp"
-#include <opencv2/datasets/track_alov.hpp>
 
 namespace cv
 {
@@ -50,10 +49,10 @@ struct TrainingSample
 double generateRandomLaplacian(double b, double m);
 
 //Convert ALOV300++ anno coordinates to Rectangle BB
-Rect2f anno2rect(vector<Point2f> annoBB);
+Rect2f anno2rect(std::vector<Point2f> annoBB);
 
 //Gather samples from random video frame
-vector <TrainingSample> gatherFrameSamples(Mat prevFrame, Mat currFrame, Rect2f prevBB, Rect2f currBB);
+std::vector <TrainingSample> gatherFrameSamples(Mat prevFrame, Mat currFrame, Rect2f prevBB, Rect2f currBB);
 
 }
 }

modules/tracking/src/tracker.cpp

@@ -112,6 +112,7 @@ Ptr<Tracker> Tracker::create( const String& trackerType )
   BOILERPLATE_CODE("TLD",TrackerTLD);
   BOILERPLATE_CODE("KCF",TrackerKCF);
   BOILERPLATE_CODE("GOTURN", TrackerGOTURN);
+
   return Ptr<Tracker>();
 }