diff --git a/src/yolo_console_dll.cpp b/src/yolo_console_dll.cpp
index cada95ec..e1f2c7e8 100644
--- a/src/yolo_console_dll.cpp
+++ b/src/yolo_console_dll.cpp
@@ -63,17 +63,19 @@ std::vector<std::string> objects_names_from_file(std::string const filename) {
 }
 
 
-int main() 
+int main(int argc, char *argv[])
 {
+	std::string filename;
+	if (argc > 1) filename = argv[1];
+
 	Detector detector("yolo-voc.cfg", "yolo-voc.weights");
 
 	auto obj_names = objects_names_from_file("data/voc.names");
 
 	while (true) 
-	{
-		std::string filename;
+	{		
 		std::cout << "input image or video filename: ";
-		std::cin >> filename;
+		if(filename.size() == 0) std::cin >> filename;
 		if (filename.size() == 0) break;
 		
 		try {
@@ -94,7 +96,7 @@ int main()
 					td.join();
 					result_vec = thread_result_vec;
 					det_frame = frame;
-					td = std::thread([&]() { thread_result_vec = detector.detect(det_frame, 0.2, true); ready_flag = true; });
+					td = std::thread([&]() { thread_result_vec = detector.detect(det_frame, 0.24, true); ready_flag = true; });
 
 					if (!prev_frame.empty()) {
 						result_vec = detector.tracking(result_vec);	// comment it - if track_id is not required
@@ -138,6 +140,7 @@ int main()
 		}
 		catch (std::exception &e) { std::cerr << "exception: " << e.what() << "\n"; getchar(); }
 		catch (...) { std::cerr << "unknown exception \n"; getchar(); }
+		filename.clear();
 	}
 
 	return 0;
diff --git a/src/yolo_v2_class.cpp b/src/yolo_v2_class.cpp
index f036b2a5..4418ce91 100644
--- a/src/yolo_v2_class.cpp
+++ b/src/yolo_v2_class.cpp
@@ -257,7 +257,6 @@ YOLODLL_API std::vector<bbox_t> Detector::tracking(std::vector<bbox_t> cur_bbox_
 		if (i.size() > 0) prev_track_id_present = true;
 
 	if (!prev_track_id_present) {
-		//track_id = 1;
 		for (size_t i = 0; i < cur_bbox_vec.size(); ++i)
 			cur_bbox_vec[i].track_id = det_gpu.track_id[cur_bbox_vec[i].obj_id]++;
 		prev_bbox_vec_deque.push_front(cur_bbox_vec);
@@ -273,7 +272,9 @@ YOLODLL_API std::vector<bbox_t> Detector::tracking(std::vector<bbox_t> cur_bbox_
 			for (size_t m = 0; m < cur_bbox_vec.size(); ++m) {
 				bbox_t const& k = cur_bbox_vec[m];
 				if (i.obj_id == k.obj_id) {
-					unsigned int cur_dist = sqrt(((float)i.x - k.x)*((float)i.x - k.x) + ((float)i.y - k.y)*((float)i.y - k.y));
+					float center_x_diff = (float)(i.x + i.w/2) - (float)(k.x + k.w/2);
+					float center_y_diff = (float)(i.y + i.h/2) - (float)(k.y + k.h/2);
+					unsigned int cur_dist = sqrt(center_x_diff*center_x_diff + center_y_diff*center_y_diff);
 					if (cur_dist < 100 && (k.track_id == 0 || dist_vec[m] > cur_dist)) {
 						dist_vec[m] = cur_dist;
 						cur_index = m;
@@ -281,9 +282,10 @@ YOLODLL_API std::vector<bbox_t> Detector::tracking(std::vector<bbox_t> cur_bbox_
 				}
 			}
 
-			bool track_id_absent = !std::any_of(cur_bbox_vec.begin(), cur_bbox_vec.end(), [&](bbox_t const& b) { return b.track_id == i.track_id; });
+			bool track_id_absent = !std::any_of(cur_bbox_vec.begin(), cur_bbox_vec.end(), 
+				[&i](bbox_t const& b) { return b.track_id == i.track_id && b.obj_id == i.obj_id; });
 
-			if (cur_index >= 0 && track_id_absent) {
+			if (cur_index >= 0 && track_id_absent){
 				cur_bbox_vec[cur_index].track_id = i.track_id;
 				cur_bbox_vec[cur_index].w = (cur_bbox_vec[cur_index].w + i.w) / 2;
 				cur_bbox_vec[cur_index].h = (cur_bbox_vec[cur_index].h + i.h) / 2;