CvPoint* point = new CvPoint[length]; //分配轮廓点
int i;
for (i = 0; i < length; i++)
point[i]=*CV_GET_SEQ_ELEM(CvPoint,contours,i);//一个一个的读取数据
CvMemStorage* storage1 = cvCreateMemStorage(0);
CvSeq* seq = cvCreateSeq( CV_32SC2, /* sequence of points */
sizeof(CvSeq), /* header size - no extra fields */
sizeof(CvPoint), /* element size */
storage1 /* the container storage */ );
for( i = 0; i <length; i++ )
cvSeqPush( seq,&point[i]);