OpenCV实现最小外接正矩形

本文实例为大家分享了OpenCV实现最小外接正矩形的具体代码，供大家参考，具体内容如下

1. #include "stdafx.h"
2. #include "cv.h"
3. #include "highgui.h"
4. #include "cxcore.h"
5. #include "math.h"
6. #include <iostream.h>
7. int main(int argc, char* argv[])
8.  
9. {
10.  
11. IplImage *src;
12. IplImage *dst;
13. IplImage *ROI;
14. CvMemStorage* storage=cvCreateMemStorage(0);
15. CvSeq* contour=0;
16. src=cvLoadImage("I:\\test.jpg",0);
17. cvNamedWindow("image0",1);
18. cvShowImage("image0",src);
19.  
20. int hei=src->height;
21. int wid=src->width;
22. uchar *data;
23. data=(uchar*)src->imageData;
24. int widstep=src->widthStep;
25. int channel=src->nChannels;
26. dst=cvCreateImage(cvSize(wid,hei),IPL_DEPTH_8U,3);
27. ROI=cvCreateImage(cvSize(wid,hei),IPL_DEPTH_8U,3);
28.  
29. for (int i=0;i<hei;i++)
30.  
31. {
32.  
33. for(int j=0;j<wid;j++)
34.  
35. {
36.  
37. if (data[i*widstep+j*channel]>120)
38.  
39. {
40.  
41. data[i*widstep+j*channel]=0;
42.  
43. }
44.  
45. else
46.  
47. {
48.  
49. data[i*widstep+j*channel]=255;
50.  
51. }
52.  
53. }
54.  
55. }
56.  
57. cvNamedWindow("image",0);
58. cvShowImage("image",src);
59. printf("图像的高为：%d,宽为：%d\n\n",hei,wid);
60. cvCvtColor(src, dst, CV_GRAY2BGR);;
61. cvFindContours(src,storage,&contour,sizeof(CvContour),CV_RETR_CCOMP,CV_CHAIN_APPROX_SIMPLE);
62. for(;contour!=0;contour=contour->h_next)
63.  
64. {
65.  
66. double length =cvArcLength(contour);
67. double area =fabs(cvContourArea(contour));
68. CvRect rect = cvBoundingRect(contour,1);
69. cout<<"Length="<<length<<" Area="<<area<<endl;
70. CvPoint p1;
71. CvPoint p2;
72. p1.x=rect.x;
73. p1.y=rect.y;
74. p2.x=rect.x+rect.width;
75. p2.y=rect.y+rect.height;
76. cout<<"p1=("<<p1.x<<","<<p1.y<<")";
77. cout<<"p2=("<<p2.x<<","<<p2.y<<")"<<endl;
78. cvRectangle(dst,p1,p2,CV_RGB(255,0,0),1,8,0);
79.  
80. }
81.  
82. cvNamedWindow("dst",1);
83. cvShowImage("dst",dst);
84. cvWaitKey(0);
85.  
86. return 0;
87.  
88. }

原图：

二值化反色图：

最小正矩形图：

最小正矩形信息：

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持我们。

原文链接：https://blog.csdn.net/suimenghuashi/article/details/39032333