利用OpenCV给图像添加标注

本程序使用范围：为运动目标跟踪提供ground truth【真实数据】，然后你可以进行各种跟踪算法误差对比

这是写论文的好帮手哦！

内容转自：http://blog.csdn.net/xiaowei_cqu，是个妹子

我在她代码上稍微改进了下。

代码如下：

// pic_label.cpp : 定义控制台应用程序的入口点。//#include "stdafx.h"#include "cv.h"#include "highgui.h"#include <iostream>#include <string>#include <vector>#include <fstream>using namespace std;//全局变量bool is_drawing=false;vector<CvRect> biaozhu_boxs;CvRect drawing_box;IplImage *img,*img1;static void help();static void onMouse( int event, int x, int y, int, void* );int _tmain(int argc, _TCHAR* argv[]){CvFont font;CvScalar scalar;char text[10];// 初始化字体double hScale=1;   double vScale=1;    int lineWidth=3;// 相当于写字的线条scalar=CV_RGB(255,0,0);cvInitFont(&font,CV_FONT_HERSHEY_SIMPLEX|CV_FONT_ITALIC, hScale,vScale,0,lineWidth);//初始化字体，准备写到图片上的  int frame_counter = 0;int obj_id = 0;CvCapture *capture=cvCreateFileCapture("a.avi");img = cvQueryFrame(capture);img1 = cvCreateImage(cvSize(img->width,img->height),IPL_DEPTH_8U,3);cvCopy(img,img1);ofstream outfile("a.txt");help();for(vector<CvRect>::iterator it=biaozhu_boxs.begin();it!=biaozhu_boxs.end();++it){cvRectangle(img1,cvPoint((*it).x,(*it).y),cvPoint((*it).x + (*it).width,(*it).y + (*it).height),CV_RGB(0,255,0));}cvShowImage("video",img);cvSetMouseCallback( "video", onMouse, 0 );while (1){int c=cvWaitKey(0);if( (c & 255) == 27 ){cout << "Exiting ...\n";break;}switch((char)c){case 'n'://read the next frame++frame_counter;img = cvQueryFrame(capture);cvCopy(img,img1);if(!img){cout<<"\nVideo Finished!"<<endl;return 0;}//save all of the labeling rectsfor(vector<CvRect>::iterator it=biaozhu_boxs.begin();it!=biaozhu_boxs.end();++it){cvRectangle(img1,cvPoint((*it).x,(*it).y),cvPoint((*it).x + (*it).width,(*it).y + (*it).height),CV_RGB(0,255,0));itoa(obj_id,text,10);cvPutText(img1,text,cvPoint((*it).x,(*it).y),&font,CV_RGB(255,255,255));//在图片中输出字符outfile<<frame_counter<<" "<<obj_id<<" "<<(*it).x<<" "<<(*it).y<<" "<<(*it).width<<" "<<(*it).height<<endl;obj_id++;}obj_id = 0;break;case 'c'://clear all the rects on the imagebiaozhu_boxs.clear();cvCopy(img,img1);}cvShowImage("video",img1);}cvNamedWindow("video",0);cvReleaseCapture(&capture);cvDestroyWindow("video");return 0;}static void help(){cout << "This program designed for labeling video \n"<<"Coded by L. Wei on 9/4/2013\n"<<endl;cout<<"Use the mouse to draw rectangle on the image for labeling.\n"<<endl;cout << "Hot keys: \n""\tESC - quit the program\n""\tn - next frame of the video\n""\tc - clear all the labels\n"<<endl;}static void onMouse( int event, int x, int y, int, void* ){switch(event){case CV_EVENT_LBUTTONDOWN: //the left up point of the rectis_drawing=true;drawing_box.x=x;drawing_box.y=y;break;case CV_EVENT_MOUSEMOVE://adjust the rect (use color blue for moving)if(is_drawing){drawing_box.width=x-drawing_box.x;drawing_box.height=y-drawing_box.y;cvCopy(img,img1);for(vector<CvRect>::iterator it=biaozhu_boxs.begin();it!=biaozhu_boxs.end();++it){cvRectangle(img1,cvPoint((*it).x,(*it).y),cvPoint((*it).x + (*it).width,(*it).y + (*it).height),CV_RGB(0,255,0));}cvRectangle(img1,cvPoint(drawing_box.x,drawing_box.y),cvPoint(drawing_box.x+drawing_box.width,drawing_box.y+drawing_box.height),CV_RGB(255,0,0));}break;case CV_EVENT_LBUTTONUP://finish drawing the rect (use color green for finish)if(is_drawing){drawing_box.width=x-drawing_box.x;drawing_box.height=y-drawing_box.y;cvCopy(img,img1);for(vector<CvRect>::iterator it=biaozhu_boxs.begin();it!=biaozhu_boxs.end();++it){cvRectangle(img1,cvPoint((*it).x,(*it).y),cvPoint((*it).x + (*it).width,(*it).y + (*it).height),CV_RGB(0,255,0));}cvRectangle(img1,cvPoint(drawing_box.x,drawing_box.y),cvPoint(drawing_box.x+drawing_box.width,drawing_box.y+drawing_box.height),CV_RGB(255,0,0));biaozhu_boxs.push_back(drawing_box);}is_drawing=false;break;}cvShowImage("video",img1);return;}

功能及用法：

1.鼠标框定目标【可多个】

2.按n，进入下一帧，保存当前框定目标坐标到txt文本【可多个】

3.按c，清除当前帧所有已标定区域【人总有犯错的时候】或者上一帧遗留的区域

文件保存格式：

帧编号 目标编号 矩形左上角坐标 矩形右下角坐标

图片如下：

接下来，就用Matlab尽情的画折线图吧！！吼吼！