opencv中对图片的二值化操作并提取特定颜***域

 1 #include<opencv2/core/core.hpp>  
 2 #include<opencv2/highgui/highgui.hpp>  
 3 #include<opencv2/imgproc/imgproc.hpp>  
 4 #include <vector>
 5 #include<iostream>  
 6 #include<string>
 7 
 8 using namespace std;
 9 using namespace cv;
10 //bgr图像  
11 Mat bgr;
12 //HSV图像  
13 Mat hsv;
14 //色相  
15 int hmin = 0;//h分量取下限
16 int hmax = 180;//h分量取上限
17 int h_Max = 180; //h分量可取的最大值
18 //饱和度  
19 int smin = 0;//s分量取下限
20 int smax = 255;//s分量取上限
21 int s_Max = 255;//s分量可取的最大值
22 //亮度  
23 int vmin = 0;//v分量取下限
24 int vmax = 255;//v分量取上限
25 int v_Max = 255;//v分量可取的最大值
26 
27 string windowName = "src";
28 
29 string dstName = "dst";
30 //输出图像  
31 Mat dst;
32 //回调函数  
33 void callBack(int, void*)
34 {
35     //输出图像分配内存  
36     dst = Mat::zeros(bgr.size(), bgr.type());
37      
38     Mat mask;
39     inRange(hsv, Scalar(hmin, smin, vmin), Scalar(hmax, smax, vmax), mask);
40      
41     for (int r = 0; r < bgr.rows; r++)
42     {
43         for (int c = 0; c < bgr.cols; c++)
44         {
45             if (mask.at<uchar>(r, c) == 255)
46             {
47                 dst.at<Vec3b>(r, c)[0] = bgr.at<Vec3b>(r, c)[0];
48                 dst.at<Vec3b>(r, c)[1] = bgr.at<Vec3b>(r, c)[1];
49                 dst.at<Vec3b>(r, c)[2] = bgr.at<Vec3b>(r, c)[2];
50             }
51         }
52     }
53     imshow("mask", mask);
54     //输出图片
55     imshow("dst", dst);
56 }
57 int main()
58 {
59     //输入图片 
60     Mat srcImage = imread("C:\\Users\\Administrator\\Desktop\\0001.jpg");
61     if (!srcImage.data){
62         cout << "图片读取失败" << endl;
63         system("pause");
64         return -1;
65     }
66     imshow(windowName, srcImage);
67     bgr = srcImage;
68     //颜色空间转换  
69     cvtColor(bgr, hsv, COLOR_BGR2HSV);
70     //定义输出图像的显示窗口  
71     namedWindow(dstName, 0);
72     //调节色相 H  
73     createTrackbar("hmin", dstName, &hmin, h_Max, callBack);
74     createTrackbar("hmax", dstName, &hmax, h_Max, callBack);
75     //调节饱和度 S  
76     createTrackbar("smin", dstName, &smin, s_Max, callBack);
77     createTrackbar("smax", dstName, &smax, s_Max, callBack);
78     //调节亮度 V  
79     createTrackbar("vmin", dstName, &vmin, v_Max, callBack);
80     createTrackbar("vmax", dstName, &vmax, v_Max, callBack);
81     callBack(0, 0);
82     waitKey(0);
83     return 0;
84 }