From cd8a3dcb4ca42f22ad8f46a95e00977c92be6bbd Mon Sep 17 00:00:00 2001
From: AlexeyAB <alexeyab84@gmail.com>
Date: Thu, 08 Feb 2018 23:22:42 +0000
Subject: [PATCH] Compile fixes

---
 src/yolo_v2_class.hpp |  279 ++++++++++++++++++++++++++++++++++++++++++++-----------
 1 files changed, 223 insertions(+), 56 deletions(-)

diff --git a/src/yolo_v2_class.hpp b/src/yolo_v2_class.hpp
index 66eab73..7d0516e 100644
--- a/src/yolo_v2_class.hpp
+++ b/src/yolo_v2_class.hpp
@@ -8,11 +8,6 @@
 #include <opencv2/opencv.hpp>			// C++
 #include "opencv2/highgui/highgui_c.h"	// C
 #include "opencv2/imgproc/imgproc_c.h"	// C
-
-#include <opencv2/cudaoptflow.hpp>
-#include <opencv2/cudaimgproc.hpp>
-#include <opencv2/cudaarithm.hpp>
-#include <opencv2/core/cuda.hpp>
 #endif	// OPENCV
 
 #ifdef YOLODLL_EXPORTS
@@ -34,6 +29,7 @@
 	float prob;					// confidence - probability that the object was found correctly
 	unsigned int obj_id;		// class of object - from range [0, classes-1]
 	unsigned int track_id;		// tracking id for video (0 - untracked, 1 - inf - tracked object)
+	unsigned int frames_counter;// counter of frames on which the object was detected
 };
 
 struct image_t {
@@ -62,7 +58,8 @@
 	YOLODLL_API int get_net_width() const;
 	YOLODLL_API int get_net_height() const;
 
-	YOLODLL_API std::vector<bbox_t> tracking(std::vector<bbox_t> cur_bbox_vec, int const frames_story = 6);
+	YOLODLL_API std::vector<bbox_t> tracking_id(std::vector<bbox_t> cur_bbox_vec, bool const change_history = true, 
+												int const frames_story = 10, int const max_dist = 150);
 
 #ifdef OPENCV
 	std::vector<bbox_t> detect(cv::Mat mat, float thresh = 0.2, bool use_mean = false)
@@ -147,15 +144,24 @@
 };
 
 
+
 #if defined(TRACK_OPTFLOW) && defined(OPENCV)
 
+#include <opencv2/cudaoptflow.hpp>
+#include <opencv2/cudaimgproc.hpp>
+#include <opencv2/cudaarithm.hpp>
+#include <opencv2/core/cuda.hpp>
+
 class Tracker_optflow {
 public:
 	const int gpu_count;
 	const int gpu_id;
+	const int flow_error;
 
 
-	Tracker_optflow(int _gpu_id = 0) : gpu_count(cv::cuda::getCudaEnabledDeviceCount()), gpu_id(std::min(_gpu_id, gpu_count-1))
+	Tracker_optflow(int _gpu_id = 0, int win_size = 9, int max_level = 3, int iterations = 8000, int _flow_error = -1) :
+		gpu_count(cv::cuda::getCudaEnabledDeviceCount()), gpu_id(std::min(_gpu_id, gpu_count-1)),
+		flow_error((_flow_error > 0)? _flow_error:(win_size*4))
 	{
 		int const old_gpu_id = cv::cuda::getDevice();
 		cv::cuda::setDevice(gpu_id);
@@ -163,9 +169,9 @@
 		stream = cv::cuda::Stream();
 
 		sync_PyrLKOpticalFlow_gpu = cv::cuda::SparsePyrLKOpticalFlow::create();
-		sync_PyrLKOpticalFlow_gpu->setWinSize(cv::Size(21, 21));	// 15, 21, 31
-		sync_PyrLKOpticalFlow_gpu->setMaxLevel(3);		// +- 3 pt
-		sync_PyrLKOpticalFlow_gpu->setNumIters(2000);	// def: 30
+		sync_PyrLKOpticalFlow_gpu->setWinSize(cv::Size(win_size, win_size));	// 9, 15, 21, 31
+		sync_PyrLKOpticalFlow_gpu->setMaxLevel(max_level);		// +- 3 pt
+		sync_PyrLKOpticalFlow_gpu->setNumIters(iterations);	// 2000, def: 30
 
 		cv::cuda::setDevice(old_gpu_id);
 	}
@@ -173,7 +179,6 @@
 	// just to avoid extra allocations
 	cv::cuda::GpuMat src_mat_gpu;
 	cv::cuda::GpuMat dst_mat_gpu, dst_grey_gpu;
-	cv::cuda::GpuMat tmp_grey_gpu;
 	cv::cuda::GpuMat prev_pts_flow_gpu, cur_pts_flow_gpu;
 	cv::cuda::GpuMat status_gpu, err_gpu;
 
@@ -181,7 +186,41 @@
 	cv::Ptr<cv::cuda::SparsePyrLKOpticalFlow> sync_PyrLKOpticalFlow_gpu;
 	cv::cuda::Stream stream;
 
-	void update_tracking_flow(cv::Mat src_mat)
+	std::vector<bbox_t> cur_bbox_vec;
+	std::vector<bool> good_bbox_vec_flags;
+	cv::Mat prev_pts_flow_cpu;
+
+	void update_cur_bbox_vec(std::vector<bbox_t> _cur_bbox_vec)
+	{
+		cur_bbox_vec = _cur_bbox_vec;
+		good_bbox_vec_flags.resize(cur_bbox_vec.size());
+		for (auto &i : good_bbox_vec_flags) i = true;
+		cv::Mat prev_pts, cur_pts_flow_cpu;
+
+		for (auto &i : cur_bbox_vec) {
+			float x_center = (i.x + i.w / 2.0F);
+			float y_center = (i.y + i.h / 2.0F);
+			prev_pts.push_back(cv::Point2f(x_center, y_center));
+		}
+
+		if (prev_pts.rows == 0)
+			prev_pts_flow_cpu = cv::Mat();
+		else
+			cv::transpose(prev_pts, prev_pts_flow_cpu);
+
+		if (prev_pts_flow_gpu.cols < prev_pts_flow_cpu.cols) {
+			prev_pts_flow_gpu = cv::cuda::GpuMat(prev_pts_flow_cpu.size(), prev_pts_flow_cpu.type());
+			cur_pts_flow_gpu = cv::cuda::GpuMat(prev_pts_flow_cpu.size(), prev_pts_flow_cpu.type());
+
+			status_gpu = cv::cuda::GpuMat(prev_pts_flow_cpu.size(), CV_8UC1);
+			err_gpu = cv::cuda::GpuMat(prev_pts_flow_cpu.size(), CV_32FC1);
+		}
+
+		prev_pts_flow_gpu.upload(cv::Mat(prev_pts_flow_cpu), stream);
+	}
+
+
+	void update_tracking_flow(cv::Mat src_mat, std::vector<bbox_t> _cur_bbox_vec)
 	{
 		int const old_gpu_id = cv::cuda::getDevice();
 		if (old_gpu_id != gpu_id)
@@ -193,15 +232,18 @@
 				src_grey_gpu = cv::cuda::GpuMat(src_mat.size(), CV_8UC1);
 			}
 
+			update_cur_bbox_vec(_cur_bbox_vec);
+
+			//src_grey_gpu.upload(src_mat, stream);	// use BGR
 			src_mat_gpu.upload(src_mat, stream);
-			cv::cuda::cvtColor(src_mat_gpu, src_grey_gpu, CV_BGR2GRAY, 0, stream);
+			cv::cuda::cvtColor(src_mat_gpu, src_grey_gpu, CV_BGR2GRAY, 1, stream);
 		}
 		if (old_gpu_id != gpu_id)
 			cv::cuda::setDevice(old_gpu_id);
 	}
 
 
-	std::vector<bbox_t> tracking_flow(cv::Mat dst_mat, std::vector<bbox_t> cur_bbox_vec)
+	std::vector<bbox_t> tracking_flow(cv::Mat dst_mat, bool check_error = true)
 	{
 		if (sync_PyrLKOpticalFlow_gpu.empty()) {
 			std::cout << "sync_PyrLKOpticalFlow_gpu isn't initialized \n";
@@ -215,13 +257,11 @@
 		if (dst_mat_gpu.cols == 0) {
 			dst_mat_gpu = cv::cuda::GpuMat(dst_mat.size(), dst_mat.type());
 			dst_grey_gpu = cv::cuda::GpuMat(dst_mat.size(), CV_8UC1);
-			tmp_grey_gpu = cv::cuda::GpuMat(dst_mat.size(), CV_8UC1);
 		}
 
+		//dst_grey_gpu.upload(dst_mat, stream);	// use BGR
 		dst_mat_gpu.upload(dst_mat, stream);
-
-
-		cv::cuda::cvtColor(dst_mat_gpu, dst_grey_gpu, CV_BGR2GRAY, 0, stream);
+		cv::cuda::cvtColor(dst_mat_gpu, dst_grey_gpu, CV_BGR2GRAY, 1, stream);
 
 		if (src_grey_gpu.rows != dst_grey_gpu.rows || src_grey_gpu.cols != dst_grey_gpu.cols) {
 			stream.waitForCompletion();
@@ -230,40 +270,13 @@
 			return cur_bbox_vec;
 		}
 
-		cv::Mat prev_pts, prev_pts_flow_cpu, cur_pts_flow_cpu;
-
-		for (auto &i : cur_bbox_vec) {
-			float x_center = (i.x + i.w / 2);
-			float y_center = (i.y + i.h / 2);
-			prev_pts.push_back(cv::Point2f(x_center, y_center));
-		}
-
-
-		if (prev_pts.rows == 0)
-			prev_pts_flow_cpu = cv::Mat();
-		else
-			cv::transpose(prev_pts, prev_pts_flow_cpu);
-
-
-		if (prev_pts_flow_gpu.cols < prev_pts_flow_cpu.cols) {
-			prev_pts_flow_gpu = cv::cuda::GpuMat(prev_pts_flow_cpu.size(), prev_pts_flow_cpu.type());
-			cur_pts_flow_gpu = cv::cuda::GpuMat(prev_pts_flow_cpu.size(), prev_pts_flow_cpu.type());
-
-			status_gpu = cv::cuda::GpuMat(prev_pts_flow_cpu.size(), CV_8UC1);
-			err_gpu = cv::cuda::GpuMat(prev_pts_flow_cpu.size(), CV_32FC1);
-		}
-
-		prev_pts_flow_gpu.upload(cv::Mat(prev_pts_flow_cpu), stream);
-
-
-		dst_grey_gpu.copyTo(tmp_grey_gpu, stream);
-
 		////sync_PyrLKOpticalFlow_gpu.sparse(src_grey_gpu, dst_grey_gpu, prev_pts_flow_gpu, cur_pts_flow_gpu, status_gpu, &err_gpu);	// OpenCV 2.4.x
 		sync_PyrLKOpticalFlow_gpu->calc(src_grey_gpu, dst_grey_gpu, prev_pts_flow_gpu, cur_pts_flow_gpu, status_gpu, err_gpu, stream);	// OpenCV 3.x
 
+		cv::Mat cur_pts_flow_cpu;
 		cur_pts_flow_gpu.download(cur_pts_flow_cpu, stream);
 
-		tmp_grey_gpu.copyTo(src_grey_gpu, stream);
+		dst_grey_gpu.copyTo(src_grey_gpu, stream);
 
 		cv::Mat err_cpu, status_cpu;
 		err_gpu.download(err_cpu, stream);
@@ -273,24 +286,33 @@
 
 		std::vector<bbox_t> result_bbox_vec;
 
-		for (size_t i = 0; i < cur_bbox_vec.size(); ++i)
+		if (err_cpu.cols == cur_bbox_vec.size() && status_cpu.cols == cur_bbox_vec.size()) 
 		{
-			cv::Point2f cur_key_pt = cur_pts_flow_cpu.at<cv::Point2f>(0, i);
-			cv::Point2f prev_key_pt = prev_pts_flow_cpu.at<cv::Point2f>(0, i);
+			for (size_t i = 0; i < cur_bbox_vec.size(); ++i)
+			{
+				cv::Point2f cur_key_pt = cur_pts_flow_cpu.at<cv::Point2f>(0, i);
+				cv::Point2f prev_key_pt = prev_pts_flow_cpu.at<cv::Point2f>(0, i);
 
-			float moved_x = cur_key_pt.x - prev_key_pt.x;
-			float moved_y = cur_key_pt.y - prev_key_pt.y;
+				float moved_x = cur_key_pt.x - prev_key_pt.x;
+				float moved_y = cur_key_pt.y - prev_key_pt.y;
 
-			if (err_cpu.cols > i &&  status_cpu.cols > i)
-				if (abs(moved_x) < 100 && abs(moved_y) < 100)
-					//if (err_cpu.at<float>(0, i) < 60 && status_cpu.at<unsigned char>(0, i) != 0)
+				if (abs(moved_x) < 100 && abs(moved_y) < 100 && good_bbox_vec_flags[i])
+					if (err_cpu.at<float>(0, i) < flow_error && status_cpu.at<unsigned char>(0, i) != 0)
 					{
 						cur_bbox_vec[i].x += moved_x + 0.5;
 						cur_bbox_vec[i].y += moved_y + 0.5;
 						result_bbox_vec.push_back(cur_bbox_vec[i]);
 					}
+					else good_bbox_vec_flags[i] = false;
+				else good_bbox_vec_flags[i] = false;
+
+				//if(!check_error && !good_bbox_vec_flags[i]) result_bbox_vec.push_back(cur_bbox_vec[i]);
+			}
 		}
 
+		cur_pts_flow_gpu.swap(prev_pts_flow_gpu);
+		cur_pts_flow_cpu.copyTo(prev_pts_flow_cpu);
+
 		if (old_gpu_id != gpu_id)
 			cv::cuda::setDevice(old_gpu_id);
 
@@ -302,5 +324,150 @@
 
 class Tracker_optflow {};
 
-#endif	// defined(TRACK_OPTFLOW) && defined(OPENCV) 
+#endif	// defined(TRACK_OPTFLOW) && defined(OPENCV)
 
+
+#ifdef OPENCV
+
+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;
+		bbox_t bbox;
+		cv::Mat mat_obj, mat_resized_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;
+			// find the same (track_id)
+			for (auto &i : preview_box_track_id) {
+				if (i.track_id == k.track_id) {
+					if (!one_off_detections) i.last_showed_frames_ago = 0; // for tracked objects
+					found = true;
+					break;
+				}
+			}
+			if (!found) {
+				// find empty box
+				for (auto &i : preview_box_track_id) {
+					if (i.last_showed_frames_ago == frames_history) {
+						if (!one_off_detections && k.frames_counter == 0) break; // don't show if obj isn't tracked yet
+						i.track_id = k.track_id;
+						i.obj_id = k.obj_id;
+						i.bbox = k;
+						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_resized_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) {
+						preview_box_track_id[i].last_showed_frames_ago = frames_history; 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), cv::INTER_NEAREST);
+						preview_box_track_id[i].mat_obj = roi.clone();
+						preview_box_track_id[i].mat_resized_obj = dst.clone();
+						preview_box_track_id[i].current_detection = true;
+						preview_box_track_id[i].bbox = k;
+					}
+					break;
+				}
+			}
+		}
+	}
+
+
+	void draw(cv::Mat draw_mat, bool show_small_boxes = false)
+	{
+		// draw preview box (from old or current frame)
+		for (size_t i = 0; i < preview_box_track_id.size(); ++i)
+		{
+			auto &prev_box = preview_box_track_id[i];
+
+			// draw object image
+			cv::Mat dst = prev_box.mat_resized_obj;
+			if (prev_box.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(prev_box.obj_id);
+				int thickness = (prev_box.current_detection) ? 5 : 1;
+				cv::rectangle(draw_mat, dst_rect_roi, color, thickness);
+
+				unsigned int const track_id = prev_box.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(-4, 5), cv::FONT_HERSHEY_COMPLEX_SMALL, 0.9, cv::Scalar(0, 0, 0), 2);
+
+				std::string size_str = std::to_string(prev_box.bbox.w) + "x" + std::to_string(prev_box.bbox.h);
+				putText(draw_mat, size_str, dst_rect_roi.tl() + cv::Point2i(0, 12), cv::FONT_HERSHEY_COMPLEX_SMALL, 0.8, cv::Scalar(0, 0, 0), 1);
+
+				if (!one_off_detections && prev_box.current_detection) {
+					cv::line(draw_mat, dst_rect_roi.tl() + cv::Point2i(preview_box_size, 0),
+						cv::Point2i(prev_box.bbox.x, prev_box.bbox.y + prev_box.bbox.h),
+						color);
+				}
+
+				if (one_off_detections && show_small_boxes) {
+					cv::Rect src_rect_roi(cv::Point2i(prev_box.bbox.x, prev_box.bbox.y),
+						cv::Size(prev_box.bbox.w, prev_box.bbox.h));
+					unsigned int const color_history = (255 * prev_box.last_showed_frames_ago) / frames_history;
+					color = cv::Scalar(255 - 3 * color_history, 255 - 2 * color_history, 255 - 1 * color_history);
+					if (prev_box.mat_obj.size() == src_rect_roi.size()) {
+						prev_box.mat_obj.copyTo(draw_mat(src_rect_roi));
+					}
+					cv::rectangle(draw_mat, src_rect_roi, color, thickness);
+					putText(draw_mat, track_id_str, src_rect_roi.tl() - cv::Point2i(0, 10), cv::FONT_HERSHEY_COMPLEX_SMALL, 0.8, cv::Scalar(0, 0, 0), 1);
+				}
+			}
+		}
+	}
+};
+#endif	// OPENCV

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