opencv帮我看看怎么这样呢，轮廓无法读出来

我最近呢，正在做运动识别跟踪程序，用opencv想着把运动目标提取出来加上轮廓求质心呢，结果有错误。

#include"cv.h"

#include"highgui.h"

#include "cxcore.h"

#include <D:\opencv\opencv\build\include\opencv2\legacy\legacy.hpp>

using namespace std;

using namespace cv;

IplImage* doCanny(IplImage* in,

double lowThresh,

double highThresh,

double aperture);

int main(int argc,char** argv)

{

cvNamedWindow("trace",CV_WINDOW_AUTOSIZE);

cvNamedWindow("fore",CV_WINDOW_AUTOSIZE);

CvCapture* capture=cvCreateFileCapture("bike.avi");

IplImage* frame1;

IplImage* curr=NULL;//use to store the first image

IplImage* next=NULL;//use to store the second image

IplImage* fore=NULL;//use to store the diversity between the first and the second image

IplImage* result=NULL;

IplImage* result1=NULL;

IplImage* result2=NULL;

IplImage* img2=NULL;

IplImage* img3=NULL;

double fps=cvGetCaptureProperty(capture,CV_CAP_PROP_FPS);

int frames=(int)cvGetCaptureProperty(capture,CV_CAP_PROP_FRAME_COUNT);

int flag=0;

while(frames>60)

{

//first should get the first image from the video

frame1=cvQueryFrame(capture);

curr=cvQueryFrame(capture);

flag++;

if(flag==1)

{

next=cvCreateImage(cvGetSize(curr),8,3);

fore=cvCreateImage(cvGetSize(curr),8,3);

result=cvCreateImage(cvGetSize(curr),8,3);

result1=cvCreateImage(cvGetSize(curr),8,3);

result2=cvCreateImage(cvGetSize(curr),8,3);

cvCopyImage(curr,next);//set the next is current iamge

}

else

{

cvAbsDiff(curr,next,fore);

//增加对于差图的处理

cvSmooth(fore,result,CV_GAUSSIAN,3,3);//delete some noise

CvMemStorage* storage=cvCreateMemStorage(0);//apply new store space

CvSeq* comp=0;

cvPyrSegmentation(result,result1,storage,&comp,4,200,50);

int n_comp=comp->total;//get the connected area number,we hope is 1,if not equals 1 we will use the Dilate

img3=cvCreateImage(cvGetSize(curr),8,3);

cvThreshold(result1,result2, 60, 255, CV_THRESH_BINARY);

cvDilate(result2,img3,NULL,2);

int mode=CV_RETR_EXTERNAL;

cvFindContours(img3,storage,&comp,sizeof(CvContour),mode,CV_CHAIN_APPROX_SIMPLE);//一到这里就出问题了，编译无错误，运行出现错误了

int i;

for(i=1;comp!=0;comp->h_next)

{//get the area

double area=fabs(cvContourArea(comp,CV_WHOLE_SEQ));

CvScalar color = CV_RGB(i, rand()&255, rand()&255);

cvDrawContours(img3, comp, color, color, -1, CV_FILLED, 8 );

i++; // label递增

}

// img3=doCanny(img2,10.0,100,3);//make a canny detect

cvShowImage("trace",frame1);

cvShowImage("fore",img3);

char s=cvWaitKey(33);

if(s==27) break;

frames--;

}

}

cvReleaseCapture(&capture);

cvDestroyWindow("fore");

cvDestroyWindow("trace");

return(0);

}