A Dynamic Pattern Recognition Method Using the Preview Controlled Saccadic Movement of the Detector

The purpose of t h i s paper is to suggest the use of b i o l o g i c a l movements of detectors f o r p a t ­ t e r n r e c o g n i t i o n . The authors demonstrate a unique method f o r recogniz ing pat terns composed of s t r a i g h t and curved l i nes such as characters or edge p a t t e r n s , independent o f p o s i t i o n , r o t a t i o n , s i z e , or s l i g h t deformat ion. The p r i n c i p l e of the method i s , d i f f e r e n t from conventional scanning techniques, based on preview con t ro l l ed curve t rack ing movement s i m i l a r to the saccadic motion of the eye. The recogn i t i on depends on the t ime sequence of s t r a i g h t l i n e , curve, angle, i n t e r s e c t i o n , e t c . D i sc r im i ­ na t i on between a s t r a i g h t and a curved l i n e , la rger or small cu rva tu re , and obtuse or acute angle is based on the r e l a t i v e d i f f i c u l t y in t rack ing the l i n e . For small pa t terns which l i e completely w i t h i n the f i e l d of the de tec to r , a well-known m u l t i l a y e r e d recogn i t ion device is super io r . For l a rge r p a t t e r n s , however, which l i e p a r t i a l l y ou t ­ s ide the f i e l d , the method proposed here is su­ p e r i o r . The authors t h i nk tha t t h e i r method could be use fu l f o r the eyes of robots when combined w i t h the k ind o f mu l t i l a ye red pa t te rn recogn i t i on devices described by Fukushima*).