【练习7.1】cvCreateHist创建直方图、cvCalcHist计算直方图、cvQueryHistValue_1D访问直方图及右左法则

 1 // OpenCVExerciseTesting.cpp : 定义控制台应用程序的入口点。
 2 //
 3 //D:\\Work\\Work_Programming\\Source\\Image\\lena.jpg
 4 
 5 #include "stdafx.h"
 6 #include <cv.h>
 7 #include <highgui.h>
 8 #include <iostream>
 9 
10 #include <opencv2/legacy/legacy.hpp>
11 //#pragma comment(lib, "opencv_legacy2411.lib")
12 
13 using namespace cv;
14 using namespace std;
15 
16 //函数声明-->--->-->--->-->--->-->--->//
17 
18 
19 //<--<--<--<--<--<--<--<--<--函数声明//
20 
21 int _tmain(int argc, _TCHAR* argv[])
22 {
23     CvRNG rng;
24     rng = cvRNG(cvGetTickCount());
25     IplImage* src = cvCreateImage(cvSize(10, 100), IPL_DEPTH_32F, 1);
26 
27     for (int i = 0; i < 1000; ++i)
28     {
29         double value = cvRandReal(&rng);
30         cvSetReal1D(src, i, value);
31     }
32 
33     int dims = 1;
34     int sizes[1] = { 10 };
35     int type = CV_HIST_ARRAY;
36     float arr[] = { 0.0f, 1.0f };
37     float * rangs[] = { arr };
38 
39     CvHistogram *histogram = cvCreateHist(dims, sizes, type, rangs, 1);
40     cvCalcHist(&src, histogram);
41 
42     float sum = 0.0f;
43     for (int i = 0; i < 10; ++i)
44     {
45         float value = cvQueryHistValue_1D(histogram, i);
46         cout << value << endl;
47     }
48     
49     system("pause");
50 
51     cvWaitKey();
52     cvReleaseImage(&src);
53     cvDestroyAllWindows();
54     rangs = NULL;
55 
56     return 0;
57 }
58 
59 void DrawHistogram(IplImage * image_hist, const CvHistogram * histogram)
60 {
61 
62 
63 }