图像处理速度计算

#include <time.h> int ProSpeed(int framenum) {

 static time_t rawtime;   static time_t lastrawtime;  static int speed;  static int lastframe;  time ( &rawtime );

if(rawtime-lastrawtime>=1)   {    speed=framenum-lastframe;    lastrawtime=rawtime;    lastframe=framenum;   } return speed; }