1 #include"stdafx.h"
  2 #include <iostream>
  3 
  4 using namespace cv;
  5 using namespace std;
  6 
  7 struct Select
  8 {
  9     Rect rect;//会被自动初始化为全零
 10     bool flag,compute;
 11     Select(){flag=0;compute=0;}
 12 };
 13 static Select select;
 14 static Point origin;
 15 int roadSamplePick(Mat &img,Mat &composite,Rect&roadSampleRect);
 16 
 17 static void onMouse(int event,int x,int y,int flag,void* param)
 18 {
 19     static Size size=*(Size*)param;
 20     switch(event)
 21     {
 22     case CV_EVENT_MOUSEMOVE:
 23         if(select.flag)
 24         {
 25             select.rect.x=origin.x<x?origin.x:x;
 26             select.rect.y=origin.y<y?origin.y:y;
 27             select.rect.width=abs(x-origin.x);
 28             select.rect.height=abs(y-origin.y);
 29         }
 30         break;
 31     case CV_EVENT_LBUTTONDOWN:
 32         origin=Point(x,y);
 33         select.flag=1;
 34         break;
 35     case CV_EVENT_LBUTTONUP:
 36         select.flag=0;//不画矩形框
 37         select.compute=1;//对选定区域进行计算
 38     }
 39 }
 40 int roadSamplePick(Mat &img,Mat &composite,Rect&roadSampleRect){
 41     Mat hsv,img_hsv[3],tempcom;
 42     Mat edgeh,edgev;//边缘
 43     Scalar mean,dev;
 44     cvtColor(img,hsv,CV_BGR2HSV);
 45     GaussianBlur(hsv,hsv,Size(3,3),1.5);
 46     hsv.assignTo(hsv,CV_32FC3);
 47     split(hsv,img_hsv);//0色调，1饱和度，2亮度
 48     Sobel(img_hsv[2],edgeh,-1,1,0);//垂直边缘检测(x- image derivative)
 49     Sobel(img_hsv[2],edgev,-1,0,1);//水平边缘检测(y- image derivative)
 50     tempcom=img_hsv[0]+img_hsv[1]+edgeh+edgev;//合成图像
 51     //取得样本区域
 52     
 53     Mat roadSample,roadSampleGray,road;//rect子图
 54     if(roadSampleRect.y<0)//图像过小而不能取样
 55     {
 56         std::cout<<"enable to create road sample"<<std::endl;
 57         return -1;
 58     }
 59     cout<<(double)img_hsv[0].data[0]<<" "<<(double)img_hsv[1].data[0]<<endl;
 60     roadSample=tempcom(roadSampleRect);//获取采样区域
 61     meanStdDev(roadSample,mean,dev);
 62     imshow("sample",roadSample);
 63     float *data=(float*)tempcom.data;
 64     for(int i=0;i<tempcom.total();i++)
 65     {
 66         if(data[i]<mean.val[0]-3*dev.val[0]||data[i]>mean.val[0]+3*dev.val[0])
 67             data[i]=0;
 68         else
 69             data[i]=255;
 70     }
 71     tempcom.assignTo(composite,CV_8UC1);
 72     imshow("composite",composite);
 73     return 0;
 74 
 75 }
 76 
 77 
 78 int main(int argc, unsigned char* argv[])
 79 {
 80     Mat img,choose;
 81     Size size;
 82     //交互初始化
 83     img=imread("test2.png");
 84     size=img.size();
 85     namedWindow("image");
 86     setMouseCallback("image",onMouse,(void*)&size);
 87     imshow("image",img);
 88 
 89     while(1)
 90     {
 91         if(select.flag)
 92         {
 93             choose=img.clone();
 94             rectangle(choose,select.rect,Scalar(255,0,0),3,8,0);
 95             imshow("image",choose);
 96         }
 97         if(select.compute)
 98         {
 99             Mat composite;
100             roadSamplePick(img,composite,select.rect);
101             select.compute=0;
102         }
103         if(waitKey(20)=='q')//退出
104             break;
105     }
106 
107     return 0;
108 }

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