[sane-devel] Coolscan3 backend with Nikon coolscan V ED

[Ralph Little]

Hi,

On Fri, Dec 12, 2025 at 4:23 AM David Webb via sane-devel <
sane-devel at alioth-lists.debian.net> wrote:

> Hi,
>
> Just to report, as requested in the man page, that I have successfully
> scanned a number of slides with the command:
>
>      >scanimage --autofocus --ae-wb  --format=png  -p -d
> coolscan3:usb:libusb:001:003 -o cd34a_e.png
>
> This is using the Opensuse 15.6 operating system.  Thanks for you help.
>
> However the infrared option fails:
>
>     >scanimage --autofocus --ae-wb  --format=tiff --infrared=yes --batch
> --batch-count=2 -p -d coolscan3:usb:libusb:001:003
>      scanimage: attempted to set inactive option infrared
>
> I've tried it with and without the '--batch' flag.  Any ideas??
>
> Best regards,
>
> David.
>
>
Hi,
You could look at the debug output by setting the env variable
SANE_DEBUG_COOLSCAN3=128.
Sounds from the output that this option is either unsupported with this
device or with this combination of options.

You'd have to dive into the code to see why. If you use the -A option with
scanimage (with all the options you were using except --infrared), you will
get a list of available options. Presumably it would be labelled as
inactive.

If you get no luck with the above, I could have a quick look to see if I
can figure it out. --infrared may conflict with another option that you
have selected. I don't believe that we have a current maintainer for this
backend unfortunately.

Cheers,
Ralph
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