opencv中对图片的二值化操作并提取特定颜色区域

#include  
#include  
#include  
#include 
#include  
#include

using namespace std;
using namespace cv;
//bgr图像  
Mat bgr;
//HSV图像  
Mat hsv;
//色相  
int hmin = 0;//h分量取下限
int hmax = 180;//h分量取上限
int h_Max = 180; //h分量可取的最大值
//饱和度  
int smin = 0;//s分量取下限
int smax = 255;//s分量取上限
int s_Max = 255;//s分量可取的最大值
//亮度  
int vmin = 0;//v分量取下限
int vmax = 255;//v分量取上限
int v_Max = 255;//v分量可取的最大值

string windowName = "src";

string dstName = "dst";
//输出图像  
Mat dst;
//回调函数  
void callBack(int, void*)
{
    //输出图像分配内存  
    dst = Mat::zeros(bgr.size(), bgr.type());
     
    Mat mask;
    inRange(hsv, Scalar(hmin, smin, vmin), Scalar(hmax, smax, vmax), mask);
     
    for (int r = 0; r < bgr.rows; r++)
    {
        for (int c = 0; c < bgr.cols; c++)
        {
            if (mask.at<uchar>(r, c) == 255)
            {
                dst.at<Vec3b>(r, c)[0] = bgr.at<Vec3b>(r, c)[0];
                dst.at<Vec3b>(r, c)[1] = bgr.at<Vec3b>(r, c)[1];
                dst.at<Vec3b>(r, c)[2] = bgr.at<Vec3b>(r, c)[2];
            }
        }
    }
    imshow("mask", mask);
    //输出图片
    imshow("dst", dst);
}
int main()
{
    //输入图片 
    Mat srcImage = imread("C:\\Users\\Administrator\\Desktop\\0001.jpg");
    if (!srcImage.data){
        cout << "图片读取失败" << endl;
        system("pause");
        return -1;
    }
    imshow(windowName, srcImage);
    bgr = srcImage;
    //颜色空间转换  
    cvtColor(bgr, hsv, COLOR_BGR2HSV);
    //定义输出图像的显示窗口  
    namedWindow(dstName, 0);
    //调节色相 H  
    createTrackbar("hmin", dstName, &hmin, h_Max, callBack);
    createTrackbar("hmax", dstName, &hmax, h_Max, callBack);
    //调节饱和度 S  
    createTrackbar("smin", dstName, &smin, s_Max, callBack);
    createTrackbar("smax", dstName, &smax, s_Max, callBack);
    //调节亮度 V  
    createTrackbar("vmin", dstName, &vmin, v_Max, callBack);
    createTrackbar("vmax", dstName, &vmax, v_Max, callBack);
    callBack(0, 0);
    waitKey(0);
    return 0;
}