OPENCV为什么提示cvFitEllipse未定义标识符

发布网友发布时间：2022-05-23 21:35

共1个回答

热心网友时间：2024-03-09 09:08

#include "cv.h"
#include "highgui.h"
int slider_pos=70;//阈值
IplImage *image02 =0,*image03 = 0,*image04 = 0;
void process_image(int h);
int main(int argc ,char **argv)
{
const char *filename ="rice.png";
if ((image03 = cvLoadImage(filename,0))==0)//读入图像为灰度图像
{
return -1;
}
image02 = cvCloneImage(image03);
image04 = cvCloneImage(image03);
cvNamedWindow("Source",1);
cvNamedWindow("Result",1);
cvShowImage("Source",image03);
cvCreateTrackbar("Threshold","Result",&slider_pos,255,process_image);
process_image(0);
cvWaitKey(0);
cvSaveImage("1.jpg",image04);
cvReleaseImage(&image02);
cvReleaseImage(&image03);
cvDestroyWindow("Source");
cvDestroyWindow("Result");
return 0;
}
//这个函数寻找出轮廓、用椭圆拟合画出
void process_image(int h)
{
CvMemStorage *stor;
CvSeq *cont;
CvBox2D32f *box;
CvPoint *PointArray;
CvPoint2D32f *PointArray2D32f;
stor = cvCreateMemStorage(0);
cont = cvCreateSeq(CV_SEQ_ELTYPE_POINT,sizeof(CvSeq),sizeof(CvPoint),stor);
cvThreshold(image03,image02,slider_pos,255,CV_THRESH_BINARY);
cvFindContours(image02,stor,&cont,sizeof(CvContour),
CV_RETR_LIST,CV_CHAIN_APPROX_NONE,cvPoint(0,0));
cvZero(image02);
cvZero(image04);
//绘制所有轮廓并用椭圆拟合
for (; cont; cont = cont->h_next)
{
int i;
int count = cont->total;//轮廓个数
CvPoint center;
CvSize size;
/*个数必须大于6，这是cvFitEllipse_32f的要求*/
if (count < 6)
{
continue;
}
//分配内存给点集
PointArray = (CvPoint *)malloc(count*sizeof(CvPoint));
PointArray2D32f = (CvPoint2D32f*)malloc(count*sizeof(CvPoint2D32f));
//分配内存给椭圆数据
box = (CvBox2D32f *)malloc(sizeof(CvBox2D32f));
//得到点集（这个方法值得借鉴）
cvCvtSeqToArray(cont, PointArray, CV_WHOLE_SEQ);
//将CvPoint点集转化为CvBox2D32f集合
for (i = 0; i < count; i++)
{
PointArray2D32f[i].x = (float)PointArray[i].x;
PointArray2D32f[i].y = (float)PointArray[i].y;
}
//拟合当前轮廓
cvFitEllipse(PointArray2D32f, count, box);
//绘制当前轮廓
cvDrawContours(image04, cont, CV_RGB(255, 255, 255), CV_RGB(255, 255, 255),
0, 1, 8, cvPoint(0, 0));
//将椭圆数据从浮点转化为整数表示
center.x = cvRound(box->center.x);
center.y = cvRound(box->center.y);
size.width = cvRound(box->size.width*0.5);
size.height = cvRound(box->size.height*0.5);
box->angle = -box->angle;
//画椭圆
cvEllipse(image04, center, size, box->angle, 0, 360, CV_RGB(0, 0, 255), 1, CV_AA, 0);
}