[sane-devel] more medium definitions?

[robert grah]

hallo together,

i am searching for more medium definitions, especialy for negativefilm 
scans.
i hope i am right here with my question.
diafilm scanning works great but all my negative scans are verry green 
or yellow.

i am using xsane with my epson 4990 photo unter debian testing.

are there any resources to get mor medium definitions?
i didnt find any in google and my eyes are not good enough to do my own.

maybe someone can give me a hint how i get this green under control.

thanks for sane...

best
regards
robert grah