[sane-devel] Plustek backend with Canon LiDE 30 help with 48bit color

[m. allan noah]

8 bits per channel, 3 channels (RGB) = 24 bit
and 16 bits x 3 = 48

allan

On Thu, Apr 14, 2011 at 5:44 PM, Robert Simmons <rsimmons0 at gmail.com> wrote:
> I am using a Canon CanoScan LiDE 30 along with the backend package
> 1.0.21.  This contains the most recent plustek backend (as does
> 1.0.22), so I'm using plustek version 0.52-3.  I am also running
> Kubuntu 10.10 and KDE 4.6.2.  The scanning frontends I'm using are the
> CLI scanimage that comes with the 1.0.21 backend bundle and Skanlite
> 0.4 (a KDE front end).
>
> Most everything works exactly as expected except for one thing, and
> the backend support for this exact scanner is listed as "Complete" on
> both the backend's page (http://www.gjaeger.de/scanner/plustek/) and
> on the main sane scanner compatibility page
> (http://www.sane-project.org/sane-mfgs.html#Z-CANON):
> "CanoScan N1240U/LiDE3, USB, 0x04a9/0x220e, Complete, plustek (0.52),
> sane-plustek"
>
> The one thing I can't do is get it to scan at 24 or 48 bit color.  The
> max in both scanimage and Skanlite is 16bit color.  The output of
> $scanimage --help --device plustek:libusb:003:002
> is "--depth 8|16bit [8]"
>
> The scanner specs state that 24 and 48 bit color are both possible.
> It is stated on Canon's website here:
> http://www.usa.canon.com/cusa/support/consumer/scanners/canoscan_series/canoscan_lide_30?selectedName=Specifications
>
> So, either I'm missing something (most likely), or the backend support
> for this scanner is actually "Good" not "Complete."
>
> Any help or suggestions would be greatly appreciated.
>
> Thanks,
> Rob
>
> TL;DR: I need to get 48bit color working with plustek backend and a
> CanoScan LiDE 30.
>
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