转自：ICVL
CvTermCriteria
迭代算法的终止准则
#define CV_TERMCRIT_ITER 1
#define CV_TERMCRIT_NUMBER CV_TERMCRIT_ITER
#define CV_TERMCRIT_EPS 2
typedef struct CvTermCriteria
{
int type; /* CV_TERMCRIT_ITER 和CV_TERMCRIT_EPS二值之一，或者二者的组合 */
int max_iter; /* 最大迭代次数 */
double epsilon; /* 结果的精确性 */
}
CvTermCriteria;
/* 构造函数 */
inline CvTermCriteria cvTermCriteria( int type, int
max_iter, double epsilon );
/* 在满足max_iter和epsilon的条件下检查终止准则并将其转换使得type=CV_TERMCRIT_ITER+CV_TERMCRIT_EPS */
CvTermCriteria cvCheckTermCriteria( CvTermCriteria criteria, double
default_eps, int default_max_iters );