<s>
The	O
term	O
texton	B-General_Concept
was	O
introduced	O
by	O
Béla	O
Julesz	O
in	O
1981	O
to	O
describe	O
"	O
the	O
putative	O
units	O
of	O
pre-attentive	O
human	O
texture	O
perception.	O
"	O
</s>
