OpenCV最小外接正矩形

最小外接正矩形 cvBoundingRect(contour,1)

#include "stdafx.h"

#include "cv.h"

#include "highgui.h"

#include "cxcore.h"

#include "math.h"

#include <iostream.h>

int main(int argc, char* argv[])

{

IplImage *src;

IplImage *dst;

IplImage *ROI;

CvMemStorage* storage=cvCreateMemStorage(0);

CvSeq* contour=0;

src=cvLoadImage("I:\\test.jpg",0);

cvNamedWindow("image0",1);

cvShowImage("image0",src);

int   hei=src->height;

int wid=src->width;

uchar *data;

data=(uchar*)src->imageData;

int widstep=src->widthStep;

int channel=src->nChannels;

dst=cvCreateImage(cvSize(wid,hei),IPL_DEPTH_8U,3);

ROI=cvCreateImage(cvSize(wid,hei),IPL_DEPTH_8U,3);

for (int i=0;i<hei;i++)

{

for(int j=0;j<wid;j++)

{

if (data[i*widstep+j*channel]>120)

{

data[i*widstep+j*channel]=0;

}

else

{

data[i*widstep+j*channel]=255;

}

}

}

cvNamedWindow("image",0);

cvShowImage("image",src);

printf("图像的高为：%d,宽为：%d\n\n",hei,wid);

cvCvtColor(src, dst, CV_GRAY2BGR);;

cvFindContours(src,storage,&contour,sizeof(CvContour),CV_RETR_CCOMP,CV_CHAIN_APPROX_SIMPLE);

for(;contour!=0;contour=contour->h_next)

{

double length =cvArcLength(contour);

double area =fabs(cvContourArea(contour));

CvRect rect = cvBoundingRect(contour,1);

cout<<"Length="<<length<<"   Area="<<area<<endl;

CvPoint p1;

CvPoint p2;

p1.x=rect.x;

p1.y=rect.y;

p2.x=rect.x+rect.width;

p2.y=rect.y+rect.height;

cout<<"p1=("<<p1.x<<","<<p1.y<<")";

cout<<"p2=("<<p2.x<<","<<p2.y<<")"<<endl;

cvRectangle(dst,p1,p2,CV_RGB(255,0,0),1,8,0);

}

cvNamedWindow("dst",1);

cvShowImage("dst",dst);

cvWaitKey(0);

return 0;

}