where is gamma4scanimage?

[Frédéric Bron]

>       I think  the --gamma-table 0..255,.. option that is part of scanimage
> command
>       may need to be use?
>       it is listed in scanimage man page. hope that helps:-)

I have seen that but it is rather teddious to use and gamma4scanimage
is supposed to derive the table given some rather simple options.
For example:
scanimage --custom-gamma=yes --gamma-table `gamma4scanimage 1.8 0
11500 16383 255`
Frédéric