Merge pull request #3987 from utibenkei:fix-java-wrapper-missing-legacy-multitracker-create

Fix MultiTracker.create() Java wrapper generation and add tests

Author: asmorkalov

modules/tracking/include/opencv2/tracking/tracking_legacy.hpp

@@ -401,7 +401,7 @@ class CV_EXPORTS_W MultiTracker : public Algorithm
   /**
   * \brief Returns a pointer to a new instance of MultiTracker
   */
-  CV_WRAP static Ptr<MultiTracker> create();
+  CV_WRAP static Ptr<legacy::MultiTracker> create();
 
 protected:
   //!<  storage for the tracker algorithms.

modules/tracking/misc/java/test/TrackerCreateLegacyTest.java

@@ -2,11 +2,15 @@
 
 import org.opencv.core.Core;
 import org.opencv.core.CvException;
+import org.opencv.core.CvType;
+import org.opencv.core.Mat;
+import org.opencv.core.Rect2d;
 import org.opencv.test.OpenCVTestCase;
 
 import org.opencv.tracking.Tracking;
 import org.opencv.tracking.legacy_Tracker;
 import org.opencv.tracking.legacy_TrackerTLD;
+import org.opencv.tracking.legacy_MultiTracker;
 
 public class TrackerCreateLegacyTest extends OpenCVTestCase {
 
@@ -20,4 +24,19 @@ public void testCreateLegacyTrackerTLD() {
         legacy_Tracker tracker = legacy_TrackerTLD.create();
     }
 
+    public void testCreateLegacyMultiTracker() {
+        legacy_MultiTracker multiTracker = legacy_MultiTracker.create();
+        assert(multiTracker != null);
+    }
+
+    public void testAddLegacyMultiTracker() {
+        legacy_MultiTracker multiTracker = legacy_MultiTracker.create();
+        legacy_Tracker tracker = legacy_TrackerTLD.create();
+        Mat image = new Mat(100, 100, CvType.CV_8UC3);
+        Rect2d boundingBox = new Rect2d(10, 10, 50, 50);
+
+        boolean result = multiTracker.add(tracker, image, boundingBox);
+        assert(result);
+    }
+
 }