Image Sequence Analysis of Real World Human Body Motion
نویسندگان
چکیده
I n t h i s p a p e r a t t e m p t s h a v e b e e n f o c u s e d o n u s i n g w i n d o w t r a c k i n g t e c h n l q u e t o a n a l y s e h u m a n b o d y m o v e m e n t . A c c o r d i n g t o t h e b e h a v l o r of h u m a n v i s i o n s y s t e n , a n I d e a of r o u g h a n d p r e c i s e s e a r c h s p a c e i s p r o p o s e d in o r d e r t o r e d u c e t h e s e a r c h s p a c e . S o m e p r o p e r t i e s of w i n d o w s w h l c h f i t t r a c k i n g t h e j o i n t m o v e m e n t s of t h e real w o r l d , h u m a n b o d y a r e i l 1 u s t r a t e d . F u r t h e r discussion o n w i n d o w t r a c k i n g t e c h n i q u e i s p r e s e n t e d a t last. I N T R O D U C T I O N T o a n a l y s e h u m a n b o d y m o t i o n , t r a d i t i o n a l m e t h o d i s t o i n d i c a t e t h e l o c a t i o n s of j o i n t s i n e a c h i m a g e f r a m e m a n u a l l y , t h e n c a l c u l a t i o n of s p e e d s , a c c e l e r a t i o n a n d t r a j e c t o r i e s 1 s d o n e by c o m p u t e r . I t n e e d s g r e a t a m o u n t of w o r k b u t t h e r e s u l t i s n o t v e r y p r e c i s e . A n o t h e r m e t h o d i s t o put s o m e m a r k s o n t h e p l a c e s t o b e i n v e s t i g a t e d , t h e n a n a l y s e t h e i r m o v e m e n t s a n d c h a n g e , s u c h a s r e c o g n i t i o n of h u m a n e m o t i o n a l e x p r e s s i o n d o n e by N . S u w a a n d o t h e r s . B e s i d e s , K o l c h l r o A k l t a a d o p t s a m e t h o d o f s e g m e n t a n d r e p r e s e n t a t i o n u n d e r t h e c o n d u c t i o n of h u m a n b o d y model. B u t h i s m o d e l i s t o o s i m p l e , a n d t h e i n t e r r e l a t i o n s h i p b e t w e e n i m a g e s i n t h e s e q u e n c e i s not u t i l i z e d , s o t h l s m e t h o d can't b e u s e d w i d e l y . I n t h i s p a p e r w e a d o p t a w i n d o w t r a c k i n g t e c h n l q u e t o a n a l y s e h u m a n b o d y movement.It c a n b e u s e d t o a n a l y s e h u m a n b o d y m o t i o n in real w o r l d . U I N D O U T R O C K I N G T E C H N I Q U E 1. G e n e r a l w i n d o w t r a c k i n g t e c h n i q u e : G e n e r a l wlndow-tracking t e c h n i q u e i s a d o p t e d i n t r a c k l n g r i g i d b o d y m o t i o n . A s s h o w n i n Fig.l,when r i g i d b o d y m o v e s f r o m l o c a t l o n 1 t o l o c a t i o n 2 , t h e w i n d o w a l s o t r a c k s f r o m l o c a t i o n a t o l o c a t i o n b. W e e x p r e s s t h e t e c h n i q u e w l t h f o r m u l a a s f o l l o w Fig.1 W i n d o w Fig.2 T r a c k i n g r i g l d b o d y H u m a n b o d y m o d e l D e f i n e t h e s e c o n d f r a m e a s f(x,y), D e f i n e t h e f i r s t f r a m e a s w(x,y), t h e n t r a c k i n g e v a l u a t i o n f u n c t i o n is: Obviously,R(m,n) 1 s m i n i r u m if t h e w i n d o w c o n t e n t of f i r s t f r a m e m a t c h e s t h a t of s e c o n d frame.That i s t o f i n d (mo,no)whlcn
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