#include <iostream>
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#include <iomanip>
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#include <string>
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#include <vector>
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#include <queue>
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#include <fstream>
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#include <thread>
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#include <atomic>
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#include <mutex> // std::mutex, std::unique_lock
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#include <condition_variable> // std::condition_variable
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#ifdef _WIN32
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#define OPENCV
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#endif
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// To use tracking - uncomment the following line. Tracking is supported only by OpenCV 3.x
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//#define TRACK_OPTFLOW
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#include "yolo_v2_class.hpp" // imported functions from DLL
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#ifdef OPENCV
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#include <opencv2/opencv.hpp> // C++
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#include "opencv2/core/version.hpp"
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#ifndef CV_VERSION_EPOCH
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#include "opencv2/videoio/videoio.hpp"
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#define OPENCV_VERSION CVAUX_STR(CV_VERSION_MAJOR)""CVAUX_STR(CV_VERSION_MINOR)""CVAUX_STR(CV_VERSION_REVISION)
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#pragma comment(lib, "opencv_world" OPENCV_VERSION ".lib")
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#pragma comment(lib, "opencv_cudaoptflow" OPENCV_VERSION ".lib")
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#pragma comment(lib, "opencv_cudaimgproc" OPENCV_VERSION ".lib")
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#pragma comment(lib, "opencv_core" OPENCV_VERSION ".lib")
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#pragma comment(lib, "opencv_imgproc" OPENCV_VERSION ".lib")
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#pragma comment(lib, "opencv_highgui" OPENCV_VERSION ".lib")
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#else
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#define OPENCV_VERSION CVAUX_STR(CV_VERSION_EPOCH)""CVAUX_STR(CV_VERSION_MAJOR)""CVAUX_STR(CV_VERSION_MINOR)
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#pragma comment(lib, "opencv_core" OPENCV_VERSION ".lib")
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#pragma comment(lib, "opencv_imgproc" OPENCV_VERSION ".lib")
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#pragma comment(lib, "opencv_highgui" OPENCV_VERSION ".lib")
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#endif
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cv::Scalar obj_id_to_color(int obj_id) {
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int const colors[6][3] = { { 1,0,1 },{ 0,0,1 },{ 0,1,1 },{ 0,1,0 },{ 1,1,0 },{ 1,0,0 } };
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int const offset = obj_id * 123457 % 6;
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int const color_scale = 150 + (obj_id * 123457) % 100;
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cv::Scalar color(colors[offset][0], colors[offset][1], colors[offset][2]);
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color *= color_scale;
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return color;
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}
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class preview_boxes_t {
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enum { frames_history = 30 }; // how long to keep the history saved
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struct preview_box_track_t {
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unsigned int track_id, obj_id, last_showed_frames_ago;
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cv::Mat mat_obj;
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preview_box_track_t() : track_id(0), obj_id(0), last_showed_frames_ago(frames_history) {}
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};
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std::vector<preview_box_track_t> preview_box_track_id;
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size_t const preview_box_size, bottom_offset;
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bool const one_off_detections;
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public:
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preview_boxes_t(size_t _preview_box_size = 100, size_t _bottom_offset = 100, bool _one_off_detections = false) :
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preview_box_size(_preview_box_size), bottom_offset(_bottom_offset), one_off_detections(_one_off_detections)
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{}
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void draw_preview_boxes(cv::Mat src_mat, cv::Mat draw_mat, std::vector<bbox_t> result_vec, bool draw_boxes = true)
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{
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size_t const count_preview_boxes = draw_mat.cols / preview_box_size;
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if (preview_box_track_id.size() != count_preview_boxes) preview_box_track_id.resize(count_preview_boxes);
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// increment frames history
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for (auto &i : preview_box_track_id)
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i.last_showed_frames_ago = std::min((unsigned)frames_history, i.last_showed_frames_ago + 1);
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// occupy empty boxes
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for (auto &k : result_vec) {
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bool found = false;
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for (auto &i : preview_box_track_id) {
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if (i.track_id == k.track_id) {
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if(!one_off_detections)
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i.last_showed_frames_ago = 0;
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found = true;
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break;
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}
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}
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if (!found) {
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for (auto &i : preview_box_track_id) {
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if (i.last_showed_frames_ago == frames_history) {
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if (!one_off_detections && k.frames_counter == 0) break;
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i.track_id = k.track_id;
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i.obj_id = k.obj_id;
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i.last_showed_frames_ago = 0;
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break;
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}
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}
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}
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}
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// draw preview box (from old or current frame)
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for (size_t i = 0; i < preview_box_track_id.size(); ++i)
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{
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// get object image
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cv::Mat dst = preview_box_track_id[i].mat_obj;
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bool current_detection = false;
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for (auto &k : result_vec) {
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if (preview_box_track_id[i].track_id == k.track_id) {
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if (one_off_detections && preview_box_track_id[i].last_showed_frames_ago > 0) break;
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bbox_t b = k;
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cv::Rect r(b.x, b.y, b.w, b.h);
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cv::Rect img_rect(cv::Point2i(0, 0), src_mat.size());
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cv::Rect rect_roi = r & img_rect;
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if (rect_roi.width > 1 || rect_roi.height > 1) {
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cv::Mat roi = src_mat(rect_roi);
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cv::resize(roi, dst, cv::Size(preview_box_size, preview_box_size));
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preview_box_track_id[i].mat_obj = dst.clone();
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current_detection = true;
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}
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break;
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}
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}
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// draw object image
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if (draw_boxes) {
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cv::Mat dst = preview_box_track_id[i].mat_obj;
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if (preview_box_track_id[i].last_showed_frames_ago < frames_history &&
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dst.size() == cv::Size(preview_box_size, preview_box_size))
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{
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cv::Rect dst_rect_roi(cv::Point2i(i * preview_box_size, draw_mat.rows - bottom_offset), dst.size());
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cv::Mat dst_roi = draw_mat(dst_rect_roi);
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dst.copyTo(dst_roi);
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cv::Scalar color = obj_id_to_color(preview_box_track_id[i].obj_id);
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int thickness = (current_detection) ? 5 : 1;
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cv::rectangle(draw_mat, dst_rect_roi, color, thickness);
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}
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}
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}
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}
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};
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void draw_boxes(cv::Mat mat_img, std::vector<bbox_t> result_vec, std::vector<std::string> obj_names,
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unsigned int wait_msec = 0, int current_det_fps = -1, int current_cap_fps = -1)
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{
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int const colors[6][3] = { { 1,0,1 },{ 0,0,1 },{ 0,1,1 },{ 0,1,0 },{ 1,1,0 },{ 1,0,0 } };
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for (auto &i : result_vec) {
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cv::Scalar color = obj_id_to_color(i.obj_id);
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cv::rectangle(mat_img, cv::Rect(i.x, i.y, i.w, i.h), color, 5);
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if (obj_names.size() > i.obj_id) {
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std::string obj_name = obj_names[i.obj_id];
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if (i.track_id > 0) obj_name += " - " + std::to_string(i.track_id);
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cv::Size const text_size = getTextSize(obj_name, cv::FONT_HERSHEY_COMPLEX_SMALL, 1.2, 2, 0);
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int const max_width = (text_size.width > i.w + 2) ? text_size.width : (i.w + 2);
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cv::rectangle(mat_img, cv::Point2f(std::max((int)i.x - 3, 0), std::max((int)i.y - 30, 0)),
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cv::Point2f(std::min((int)i.x + max_width, mat_img.cols-1), std::min((int)i.y, mat_img.rows-1)),
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color, CV_FILLED, 8, 0);
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putText(mat_img, obj_name, cv::Point2f(i.x, i.y - 10), cv::FONT_HERSHEY_COMPLEX_SMALL, 1.2, cv::Scalar(0, 0, 0), 2);
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}
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}
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if (current_det_fps >= 0 && current_cap_fps >= 0) {
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std::string fps_str = "FPS detection: " + std::to_string(current_det_fps) + " FPS capture: " + std::to_string(current_cap_fps);
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putText(mat_img, fps_str, cv::Point2f(10, 20), cv::FONT_HERSHEY_COMPLEX_SMALL, 1.2, cv::Scalar(50, 255, 0), 2);
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}
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cv::imshow("window name", mat_img);
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cv::waitKey(wait_msec);
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}
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#endif // OPENCV
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void show_console_result(std::vector<bbox_t> const result_vec, std::vector<std::string> const obj_names) {
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for (auto &i : result_vec) {
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if (obj_names.size() > i.obj_id) std::cout << obj_names[i.obj_id] << " - ";
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std::cout << "obj_id = " << i.obj_id << ", x = " << i.x << ", y = " << i.y
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<< ", w = " << i.w << ", h = " << i.h
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<< std::setprecision(3) << ", prob = " << i.prob << std::endl;
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}
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}
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std::vector<std::string> objects_names_from_file(std::string const filename) {
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std::ifstream file(filename);
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std::vector<std::string> file_lines;
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if (!file.is_open()) return file_lines;
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for(std::string line; getline(file, line);) file_lines.push_back(line);
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std::cout << "object names loaded \n";
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return file_lines;
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}
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int main(int argc, char *argv[])
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{
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std::string names_file = "data/voc.names";
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std::string cfg_file = "cfg/yolo-voc.cfg";
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std::string weights_file = "yolo-voc.weights";
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std::string filename;
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if (argc > 4) { //voc.names yolo-voc.cfg yolo-voc.weights test.mp4
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names_file = argv[1];
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cfg_file = argv[2];
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weights_file = argv[3];
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filename = argv[4];
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}
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else if (argc > 1) filename = argv[1];
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Detector detector(cfg_file, weights_file);
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auto obj_names = objects_names_from_file(names_file);
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std::string out_videofile = "result.avi";
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bool const save_output_videofile = false;
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#ifdef TRACK_OPTFLOW
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Tracker_optflow tracker_flow;
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detector.wait_stream = true;
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#endif
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while (true)
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{
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std::cout << "input image or video filename: ";
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if(filename.size() == 0) std::cin >> filename;
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if (filename.size() == 0) break;
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try {
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#ifdef OPENCV
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preview_boxes_t large_preview(100, 150, false), small_preview(50, 50, true);
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std::string const file_ext = filename.substr(filename.find_last_of(".") + 1);
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std::string const protocol = filename.substr(0, 7);
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if (file_ext == "avi" || file_ext == "mp4" || file_ext == "mjpg" || file_ext == "mov" || // video file
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protocol == "rtmp://" || protocol == "rtsp://" || protocol == "http://" || protocol == "https:/") // video network stream
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{
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cv::Mat cap_frame, cur_frame, det_frame, write_frame;
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std::queue<cv::Mat> track_optflow_queue;
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int passed_flow_frames = 0;
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std::shared_ptr<image_t> det_image;
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std::vector<bbox_t> result_vec, thread_result_vec;
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detector.nms = 0.02; // comment it - if track_id is not required
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std::atomic<bool> consumed, videowrite_ready;
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consumed = true;
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videowrite_ready = true;
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std::atomic<int> fps_det_counter, fps_cap_counter;
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fps_det_counter = 0;
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fps_cap_counter = 0;
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int current_det_fps = 0, current_cap_fps = 0;
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std::thread t_detect, t_cap, t_videowrite;
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std::mutex mtx;
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std::condition_variable cv_detected, cv_pre_tracked;
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std::chrono::steady_clock::time_point steady_start, steady_end;
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cv::VideoCapture cap(filename); cap >> cur_frame;
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int const video_fps = cap.get(CV_CAP_PROP_FPS);
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cv::Size const frame_size = cur_frame.size();
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cv::VideoWriter output_video;
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if (save_output_videofile)
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output_video.open(out_videofile, CV_FOURCC('D', 'I', 'V', 'X'), std::max(35, video_fps), frame_size, true);
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while (!cur_frame.empty())
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{
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// always sync
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if (t_cap.joinable()) {
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t_cap.join();
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++fps_cap_counter;
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cur_frame = cap_frame.clone();
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}
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t_cap = std::thread([&]() { cap >> cap_frame; });
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// swap result bouned-boxes and input-frame
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if(consumed)
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{
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std::unique_lock<std::mutex> lock(mtx);
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det_image = detector.mat_to_image_resize(cur_frame);
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auto old_result_vec = result_vec;
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result_vec = thread_result_vec;
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result_vec = detector.tracking_id(result_vec); // comment it - if track_id is not required
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#ifdef TRACK_OPTFLOW
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// track optical flow
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if (track_optflow_queue.size() > 0) {
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small_preview.draw_preview_boxes(track_optflow_queue.front(), cur_frame, result_vec, false);
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std::queue<cv::Mat> new_track_optflow_queue;
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//std::cout << "\n !!!! all = " << track_optflow_queue.size() << ", cur = " << passed_flow_frames << std::endl;
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tracker_flow.update_tracking_flow(track_optflow_queue.front());
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while (track_optflow_queue.size() > 1) {
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track_optflow_queue.pop();
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result_vec = tracker_flow.tracking_flow(track_optflow_queue.front(), result_vec);
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if (track_optflow_queue.size() <= passed_flow_frames && new_track_optflow_queue.size() == 0)
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new_track_optflow_queue = track_optflow_queue;
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}
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track_optflow_queue = new_track_optflow_queue;
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passed_flow_frames = 0;
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}
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#endif
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// add old tracked objects
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for (auto &i : old_result_vec) {
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auto it = std::find_if(result_vec.begin(), result_vec.end(),
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[&i](bbox_t const& b) { return b.track_id == i.track_id && b.obj_id == i.obj_id; });
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bool track_id_absent = (it == result_vec.end());
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if (track_id_absent) {
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if (i.frames_counter-- > 1)
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result_vec.push_back(i);
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}
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else
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it->frames_counter = std::min((unsigned)3, i.frames_counter + 1);
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}
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consumed = false;
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cv_pre_tracked.notify_all();
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}
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// launch thread once - Detection
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if (!t_detect.joinable()) {
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t_detect = std::thread([&]() {
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auto current_image = det_image;
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consumed = true;
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while (current_image.use_count() > 0) {
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auto result = detector.detect_resized(*current_image, frame_size, 0.20, false); // true
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++fps_det_counter;
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std::unique_lock<std::mutex> lock(mtx);
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thread_result_vec = result;
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current_image = det_image;
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consumed = true;
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cv_detected.notify_all();
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if(detector.wait_stream)
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while (consumed) cv_pre_tracked.wait(lock);
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}
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});
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}
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if (!cur_frame.empty()) {
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steady_end = std::chrono::steady_clock::now();
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if (std::chrono::duration<double>(steady_end - steady_start).count() >= 1) {
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current_det_fps = fps_det_counter;
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current_cap_fps = fps_cap_counter;
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steady_start = steady_end;
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fps_det_counter = 0;
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fps_cap_counter = 0;
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}
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#ifdef TRACK_OPTFLOW
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++passed_flow_frames;
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track_optflow_queue.push(cur_frame.clone());
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result_vec = tracker_flow.tracking_flow(cur_frame, result_vec, true); // track optical flow
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small_preview.draw_preview_boxes(cur_frame.clone(), cur_frame, result_vec, true);
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#endif
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large_preview.draw_preview_boxes(cur_frame.clone(), cur_frame, result_vec, true);
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draw_boxes(cur_frame, result_vec, obj_names, 3, current_det_fps, current_cap_fps); // 3 or 16ms
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//show_console_result(result_vec, obj_names);
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if (output_video.isOpened() && videowrite_ready) {
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if (t_videowrite.joinable()) t_videowrite.join();
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write_frame = cur_frame.clone();
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videowrite_ready = false;
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t_videowrite = std::thread([&]() {
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output_video << write_frame; videowrite_ready = true;
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});
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}
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}
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#ifndef TRACK_OPTFLOW
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// wait detection result for video-file only (not for net-cam)
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if (protocol != "rtsp://" && protocol != "http://" && protocol != "https:/") {
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std::unique_lock<std::mutex> lock(mtx);
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while (!consumed) cv_detected.wait(lock);
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}
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#endif
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}
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if (t_cap.joinable()) t_cap.join();
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if (t_detect.joinable()) t_detect.join();
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if (t_videowrite.joinable()) t_videowrite.join();
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std::cout << "Video ended \n";
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}
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else if (file_ext == "txt") { // list of image files
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std::ifstream file(filename);
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if (!file.is_open()) std::cout << "File not found! \n";
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else
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for (std::string line; file >> line;) {
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std::cout << line << std::endl;
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cv::Mat mat_img = cv::imread(line);
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std::vector<bbox_t> result_vec = detector.detect(mat_img);
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show_console_result(result_vec, obj_names);
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//draw_boxes(mat_img, result_vec, obj_names);
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//cv::imwrite("res_" + line, mat_img);
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}
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}
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else { // image file
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cv::Mat mat_img = cv::imread(filename);
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std::vector<bbox_t> result_vec = detector.detect(mat_img);
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result_vec = detector.tracking_id(result_vec); // comment it - if track_id is not required
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draw_boxes(mat_img, result_vec, obj_names);
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show_console_result(result_vec, obj_names);
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}
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#else
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//std::vector<bbox_t> result_vec = detector.detect(filename);
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auto img = detector.load_image(filename);
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std::vector<bbox_t> result_vec = detector.detect(img);
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detector.free_image(img);
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show_console_result(result_vec, obj_names);
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#endif
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}
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catch (std::exception &e) { std::cerr << "exception: " << e.what() << "\n"; getchar(); }
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catch (...) { std::cerr << "unknown exception \n"; getchar(); }
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filename.clear();
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}
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return 0;
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}
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