From 64aa0180bb74e84a75958b3da0061a9f5615729d Mon Sep 17 00:00:00 2001
From: Alexey <AlexeyAB@users.noreply.github.com>
Date: Sat, 03 Feb 2018 12:42:16 +0000
Subject: [PATCH] Merge pull request #355 from PTS93/patch-1

---
 src/yolo_console_dll.cpp |  246 ++++++++++++++++++++++++++++++++++++++++++++-----
 1 files changed, 221 insertions(+), 25 deletions(-)

diff --git a/src/yolo_console_dll.cpp b/src/yolo_console_dll.cpp
index 58b3893..b8afdd6 100644
--- a/src/yolo_console_dll.cpp
+++ b/src/yolo_console_dll.cpp
@@ -2,6 +2,7 @@
 #include <iomanip> 
 #include <string>
 #include <vector>
+#include <queue>
 #include <fstream>
 #include <thread>
 #include <atomic>
@@ -12,6 +13,9 @@
 #define OPENCV
 #endif
 
+// To use tracking - uncomment the following line. Tracking is supported only by OpenCV 3.x
+//#define TRACK_OPTFLOW
+
 #include "yolo_v2_class.hpp"	// imported functions from DLL
 
 #ifdef OPENCV
@@ -19,24 +23,141 @@
 #include "opencv2/core/version.hpp"
 #ifndef CV_VERSION_EPOCH
 #include "opencv2/videoio/videoio.hpp"
-#pragma comment(lib, "opencv_world320.lib")  
+#define OPENCV_VERSION CVAUX_STR(CV_VERSION_MAJOR)""CVAUX_STR(CV_VERSION_MINOR)""CVAUX_STR(CV_VERSION_REVISION)
+#pragma comment(lib, "opencv_world" OPENCV_VERSION ".lib")
+#pragma comment(lib, "opencv_cudaoptflow" OPENCV_VERSION ".lib")
+#pragma comment(lib, "opencv_cudaimgproc" OPENCV_VERSION ".lib")
+#pragma comment(lib, "opencv_core" OPENCV_VERSION ".lib")
+#pragma comment(lib, "opencv_imgproc" OPENCV_VERSION ".lib")
+#pragma comment(lib, "opencv_highgui" OPENCV_VERSION ".lib")
 #else
-#pragma comment(lib, "opencv_core2413.lib")  
-#pragma comment(lib, "opencv_imgproc2413.lib")  
-#pragma comment(lib, "opencv_highgui2413.lib") 
+#define OPENCV_VERSION CVAUX_STR(CV_VERSION_EPOCH)""CVAUX_STR(CV_VERSION_MAJOR)""CVAUX_STR(CV_VERSION_MINOR)
+#pragma comment(lib, "opencv_core" OPENCV_VERSION ".lib")
+#pragma comment(lib, "opencv_imgproc" OPENCV_VERSION ".lib")
+#pragma comment(lib, "opencv_highgui" OPENCV_VERSION ".lib")
 #endif
 
 
+cv::Scalar obj_id_to_color(int obj_id) {
+	int const colors[6][3] = { { 1,0,1 },{ 0,0,1 },{ 0,1,1 },{ 0,1,0 },{ 1,1,0 },{ 1,0,0 } };
+	int const offset = obj_id * 123457 % 6;
+	int const color_scale = 150 + (obj_id * 123457) % 100;
+	cv::Scalar color(colors[offset][0], colors[offset][1], colors[offset][2]);
+	color *= color_scale;
+	return color;
+}
+
+class preview_boxes_t {
+	enum { frames_history = 30 };	// how long to keep the history saved
+
+	struct preview_box_track_t {
+		unsigned int track_id, obj_id, last_showed_frames_ago;
+		bool current_detection;
+		cv::Mat mat_obj;
+		preview_box_track_t() : track_id(0), obj_id(0), last_showed_frames_ago(frames_history), current_detection(false){}
+	};
+	std::vector<preview_box_track_t> preview_box_track_id;
+	size_t const preview_box_size, bottom_offset;
+	bool const one_off_detections;
+public:
+	preview_boxes_t(size_t _preview_box_size = 100, size_t _bottom_offset = 100, bool _one_off_detections = false) :
+		preview_box_size(_preview_box_size), bottom_offset(_bottom_offset), one_off_detections(_one_off_detections)
+	{}
+
+	void set(cv::Mat src_mat, std::vector<bbox_t> result_vec)
+	{
+		size_t const count_preview_boxes = src_mat.cols / preview_box_size;
+		if (preview_box_track_id.size() != count_preview_boxes) preview_box_track_id.resize(count_preview_boxes);
+
+		// increment frames history
+		for (auto &i : preview_box_track_id)
+			i.last_showed_frames_ago = std::min((unsigned)frames_history, i.last_showed_frames_ago + 1);
+
+		// occupy empty boxes
+		for (auto &k : result_vec) {
+			bool found = false;
+			for (auto &i : preview_box_track_id) {
+				if (i.track_id == k.track_id) {
+					if (!one_off_detections)
+						i.last_showed_frames_ago = 0;
+					found = true;
+					break;
+				}
+			}
+			if (!found) {
+				for (auto &i : preview_box_track_id) {
+					if (i.last_showed_frames_ago == frames_history) {
+						if (!one_off_detections && k.frames_counter == 0) break;
+						i.track_id = k.track_id;
+						i.obj_id = k.obj_id;
+						i.last_showed_frames_ago = 0;
+						break;
+					}
+				}
+			}
+		}
+
+		// draw preview box (from old or current frame)
+		for (size_t i = 0; i < preview_box_track_id.size(); ++i)
+		{
+			// get object image
+			cv::Mat dst = preview_box_track_id[i].mat_obj;
+			preview_box_track_id[i].current_detection = false;
+
+			for (auto &k : result_vec) {
+				if (preview_box_track_id[i].track_id == k.track_id) {
+					if (one_off_detections && preview_box_track_id[i].last_showed_frames_ago > 0) break;
+					bbox_t b = k;
+					cv::Rect r(b.x, b.y, b.w, b.h);
+					cv::Rect img_rect(cv::Point2i(0, 0), src_mat.size());
+					cv::Rect rect_roi = r & img_rect;
+					if (rect_roi.width > 1 || rect_roi.height > 1) {
+						cv::Mat roi = src_mat(rect_roi);
+						cv::resize(roi, dst, cv::Size(preview_box_size, preview_box_size));
+						preview_box_track_id[i].mat_obj = dst.clone();
+						preview_box_track_id[i].current_detection = true;
+					}
+					break;
+				}
+			}
+		}
+	}
+
+
+	void draw(cv::Mat draw_mat)
+	{
+		// draw preview box (from old or current frame)
+		for (size_t i = 0; i < preview_box_track_id.size(); ++i)
+		{
+			// draw object image
+			cv::Mat dst = preview_box_track_id[i].mat_obj;
+			if (preview_box_track_id[i].last_showed_frames_ago < frames_history &&
+				dst.size() == cv::Size(preview_box_size, preview_box_size))
+			{
+				cv::Rect dst_rect_roi(cv::Point2i(i * preview_box_size, draw_mat.rows - bottom_offset), dst.size());
+				cv::Mat dst_roi = draw_mat(dst_rect_roi);
+				dst.copyTo(dst_roi);
+
+				cv::Scalar color = obj_id_to_color(preview_box_track_id[i].obj_id);
+				int thickness = (preview_box_track_id[i].current_detection) ? 5 : 1;
+				cv::rectangle(draw_mat, dst_rect_roi, color, thickness);
+
+				unsigned int const track_id = preview_box_track_id[i].track_id;
+				std::string track_id_str = (track_id > 0)? std::to_string(track_id):"";
+				putText(draw_mat, track_id_str, dst_rect_roi.tl() - cv::Point2i(0, 10), cv::FONT_HERSHEY_COMPLEX_SMALL, 1.0, cv::Scalar(0, 0, 0), 2);
+			}
+		}
+	}
+};
+
+
 void draw_boxes(cv::Mat mat_img, std::vector<bbox_t> result_vec, std::vector<std::string> obj_names, 
-	unsigned int wait_msec = 0, int current_det_fps = -1, int current_cap_fps = -1)
+	int current_det_fps = -1, int current_cap_fps = -1)
 {
 	int const colors[6][3] = { { 1,0,1 },{ 0,0,1 },{ 0,1,1 },{ 0,1,0 },{ 1,1,0 },{ 1,0,0 } };
 
 	for (auto &i : result_vec) {
-		int const offset = i.obj_id * 123457 % 6;
-		int const color_scale = 150 + (i.obj_id * 123457) % 100;
-		cv::Scalar color(colors[offset][0], colors[offset][1], colors[offset][2]);
-		color *= color_scale;
+		cv::Scalar color = obj_id_to_color(i.obj_id);
 		cv::rectangle(mat_img, cv::Rect(i.x, i.y, i.w, i.h), color, 5);
 		if (obj_names.size() > i.obj_id) {
 			std::string obj_name = obj_names[i.obj_id];
@@ -53,8 +174,6 @@
 		std::string fps_str = "FPS detection: " + std::to_string(current_det_fps) + "   FPS capture: " + std::to_string(current_cap_fps);
 		putText(mat_img, fps_str, cv::Point2f(10, 20), cv::FONT_HERSHEY_COMPLEX_SMALL, 1.2, cv::Scalar(50, 255, 0), 2);
 	}
-	cv::imshow("window name", mat_img);
-	cv::waitKey(wait_msec);
 }
 #endif	// OPENCV
 
@@ -80,14 +199,28 @@
 
 int main(int argc, char *argv[])
 {
+	std::string  names_file = "data/voc.names";
+	std::string  cfg_file = "cfg/yolo-voc.cfg";
+	std::string  weights_file = "yolo-voc.weights";
 	std::string filename;
-	if (argc > 1) filename = argv[1];
 
-	Detector detector("yolo-voc.cfg", "yolo-voc.weights");
+	if (argc > 4) {	//voc.names yolo-voc.cfg yolo-voc.weights test.mp4		
+		names_file = argv[1];
+		cfg_file = argv[2];
+		weights_file = argv[3];
+		filename = argv[4];
+	}
+	else if (argc > 1) filename = argv[1];
 
-	auto obj_names = objects_names_from_file("data/voc.names");
+	Detector detector(cfg_file, weights_file);
+
+	auto obj_names = objects_names_from_file(names_file);
 	std::string out_videofile = "result.avi";
 	bool const save_output_videofile = false;
+#ifdef TRACK_OPTFLOW
+	Tracker_optflow tracker_flow;
+	detector.wait_stream = true;
+#endif
 
 	while (true) 
 	{		
@@ -97,12 +230,16 @@
 		
 		try {
 #ifdef OPENCV
+			preview_boxes_t large_preview(100, 150, false), small_preview(50, 50, true);
+
 			std::string const file_ext = filename.substr(filename.find_last_of(".") + 1);
 			std::string const protocol = filename.substr(0, 7);
 			if (file_ext == "avi" || file_ext == "mp4" || file_ext == "mjpg" || file_ext == "mov" || 	// video file
 				protocol == "rtmp://" || protocol == "rtsp://" || protocol == "http://" || protocol == "https:/")	// video network stream
 			{
 				cv::Mat cap_frame, cur_frame, det_frame, write_frame;
+				std::queue<cv::Mat> track_optflow_queue;
+				int passed_flow_frames = 0;
 				std::shared_ptr<image_t> det_image;
 				std::vector<bbox_t> result_vec, thread_result_vec;
 				detector.nms = 0.02;	// comment it - if track_id is not required
@@ -115,7 +252,7 @@
 				int current_det_fps = 0, current_cap_fps = 0;
 				std::thread t_detect, t_cap, t_videowrite;
 				std::mutex mtx;
-				std::condition_variable cv;
+				std::condition_variable cv_detected, cv_pre_tracked;
 				std::chrono::steady_clock::time_point steady_start, steady_end;
 				cv::VideoCapture cap(filename); cap >> cur_frame;
 				int const video_fps = cap.get(CV_CAP_PROP_FPS);
@@ -124,7 +261,9 @@
 				if (save_output_videofile)
 					output_video.open(out_videofile, CV_FOURCC('D', 'I', 'V', 'X'), std::max(35, video_fps), frame_size, true);
 
-				while (!cur_frame.empty()) {
+				while (!cur_frame.empty()) 
+				{
+					// always sync
 					if (t_cap.joinable()) {
 						t_cap.join();
 						++fps_cap_counter;
@@ -132,28 +271,68 @@
 					}
 					t_cap = std::thread([&]() { cap >> cap_frame; });
 
-					// swap result and input-frame
+					// swap result bouned-boxes and input-frame
 					if(consumed)
 					{
 						std::unique_lock<std::mutex> lock(mtx);
 						det_image = detector.mat_to_image_resize(cur_frame);
+						//auto old_result_vec = result_vec;
+						auto old_result_vec = detector.tracking_id(result_vec);
 						result_vec = thread_result_vec;
-						result_vec = detector.tracking(result_vec);	// comment it - if track_id is not required
+#ifdef TRACK_OPTFLOW
+						// track optical flow
+						if (track_optflow_queue.size() > 0) {
+							auto tmp_result_vec = detector.tracking_id(result_vec, false);
+							small_preview.set(track_optflow_queue.front(), tmp_result_vec);
+
+							//std::cout << "\n !!!! all = " << track_optflow_queue.size() << ", cur = " << passed_flow_frames << std::endl;
+							tracker_flow.update_tracking_flow(track_optflow_queue.front(), result_vec);
+
+							while (track_optflow_queue.size() > 1) {
+								track_optflow_queue.pop();
+								result_vec = tracker_flow.tracking_flow(track_optflow_queue.front());
+							}
+							track_optflow_queue.pop();
+							passed_flow_frames = 0;
+						}
+#endif
+						result_vec = detector.tracking_id(result_vec);	// comment it - if track_id is not required
+												
+						// add old tracked objects
+						for (auto &i : old_result_vec) {
+							auto it = std::find_if(result_vec.begin(), result_vec.end(),
+								[&i](bbox_t const& b) { return b.track_id == i.track_id && b.obj_id == i.obj_id; });
+							bool track_id_absent = (it == result_vec.end());
+							if (track_id_absent) {
+								if (i.frames_counter-- > 1)
+									result_vec.push_back(i);
+							}
+							else {
+								it->frames_counter = std::min((unsigned)3, i.frames_counter + 1);
+							}
+						}
+#ifdef TRACK_OPTFLOW
+						tracker_flow.update_cur_bbox_vec(result_vec);
+#endif
 						consumed = false;
+						cv_pre_tracked.notify_all();
 					}
-					// launch thread once
+					// launch thread once - Detection
 					if (!t_detect.joinable()) {
 						t_detect = std::thread([&]() {
 							auto current_image = det_image;
 							consumed = true;
 							while (current_image.use_count() > 0) {
-								auto result = detector.detect_resized(*current_image, frame_size, 0.24, true);
+								auto result = detector.detect_resized(*current_image, frame_size, 0.20, false);	// true
 								++fps_det_counter;
 								std::unique_lock<std::mutex> lock(mtx);
 								thread_result_vec = result;
-								current_image = det_image;
 								consumed = true;
-								cv.notify_all();
+								cv_detected.notify_all();
+								if (detector.wait_stream) {
+									while (consumed) cv_pre_tracked.wait(lock);
+								}
+								current_image = det_image;
 							}
 						});
 					}
@@ -167,8 +346,21 @@
 							fps_det_counter = 0;
 							fps_cap_counter = 0;
 						}
-						draw_boxes(cur_frame, result_vec, obj_names, 3, current_det_fps, current_cap_fps);
+
+						large_preview.set(cur_frame, result_vec);
+#ifdef TRACK_OPTFLOW
+						++passed_flow_frames;
+						track_optflow_queue.push(cur_frame.clone());
+						result_vec = tracker_flow.tracking_flow(cur_frame);	// track optical flow
+						small_preview.draw(cur_frame);
+#endif						
+
+						draw_boxes(cur_frame, result_vec, obj_names, current_det_fps, current_cap_fps);
 						//show_console_result(result_vec, obj_names);
+						large_preview.draw(cur_frame);
+
+						cv::imshow("window name", cur_frame);
+						cv::waitKey(3);	// 3 or 16ms
 
 						if (output_video.isOpened() && videowrite_ready) {
 							if (t_videowrite.joinable()) t_videowrite.join();
@@ -180,11 +372,13 @@
 						}
 					}
 
+#ifndef TRACK_OPTFLOW
 					// wait detection result for video-file only (not for net-cam)
 					if (protocol != "rtsp://" && protocol != "http://" && protocol != "https:/") {
 						std::unique_lock<std::mutex> lock(mtx);
-						while (!consumed) cv.wait(lock);
+						while (!consumed) cv_detected.wait(lock);
 					}
+#endif
 				}
 				if (t_cap.joinable()) t_cap.join();
 				if (t_detect.joinable()) t_detect.join();
@@ -208,8 +402,10 @@
 			else {	// image file
 				cv::Mat mat_img = cv::imread(filename);
 				std::vector<bbox_t> result_vec = detector.detect(mat_img);
-				result_vec = detector.tracking(result_vec);	// comment it - if track_id is not required
+				result_vec = detector.tracking_id(result_vec);	// comment it - if track_id is not required
 				draw_boxes(mat_img, result_vec, obj_names);
+				cv::imshow("window name", mat_img);
+				cv::waitKey(3);	// 3 or 16ms
 				show_console_result(result_vec, obj_names);
 			}
 #else

--
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