Abstract
References
1.
Cumming
B G
Parker
A J
, 1997 Nature (London) 389 280 –283
2.
Marr
D
Poggio
T
, 1979 Proceedings of the Royal Society of London, Series B 204 301 –328
3.
Yang
Y
Blake
R
, 1991 Vision Research 21 1177 –1189