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Lang: de
Title: HP-Scanner unter Linux mit fast Roh-Qualität betreiben. (hplip)
Short Title: HP-Scanner HQ (hplip)
Publication date: 2016-12-17

Meta: en
Title: Use HP scanners under Linux with nearly raw quality. (hplip)
Short Title: HP scanners HQ (hplip)

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>>PART_1 en

<H2>Use HP scanners under Linux with nearly raw quality. (hplip)</H2>

<H3>Problem</H3>

<P>
When scanning with (x)sane or similar tools the hp scanners compress their data
in order to make the data transfer faster. <A HREF="http://h30434.www3.hp.com/t5/Scanning-Faxing-and-Copying/Bad-scan-quality-on-HP-Photosmart-5515-and-6510/td-p/2596511">official support statement</A>
</P>
<P>
Though this behaviour may make sense in most cases, in some cases you want to
use the raw data. (Maybe you just don't want the data to be compressed by the 
scanner, decompresssed by the driver and compressed again by the user tool.)
</P>

<H3>Solution</H3>

<P>
So if you want to use better scanner data, you are right here. I have taken the
patch from a <A HREF="https://bugs.launchpad.net/ubuntu/+source/hplip/+bug/1245578">bug report</A>
and compiled it with my distributions' tools.
</P>
<P>
This is the spec file I used: <A HREF="hplip_enhanced.spec">hplip_enhanced.spec</A>
</P>
<P>
Unfortunately(1) I'm not so sure wether the actual data transmission is really
raw or just JPEG compressed with an extreme high quality setting.
</P>
<P>
Unfortunately(2) the tools couldn't handle the vast amount of ppd files, so I
just deleted most of them (out of the source archive and out of the
Makefile/includes). That means that you cannot print using my package and 
maybe your scanner isn't working either. Maybe it helps to save the ppd files
and put them to the right directory manually; I don't know the hardly documented
architecture of HPLIP.
</P>
<P>
Unfortunately(3) I didn't make the spec file as clean as it could be.
</P>
<P>
Unfortunately(4) this may refuse to work on GNU/Linux distributions other than
OpenSUSE 12.2.
</P>

<H3>Download links</H3>

<P>
For space reasons the package files aren't hosted on this server, but you can
donwload them here: 
</P>

<UL>
<LI><A HREF="https://jbechtel.net/static/site/tricks/hplip_enhanced/hplip-3.16.11-enh1.src.rpm">hplip-3.16.11-enh1.src.rpm</A>
<LI><A HREF="https://jbechtel.net/static/site/tricks/hplip_enhanced/hplip-3.16.11-enh1.x86_64.rpm">hplip-3.16.11-enh1.x86_64.rpm</A>
<LI><A HREF="https://jbechtel.net/static/site/tricks/hplip_enhanced/hplip-hpijs-3.16.11-enh1.x86_64.rpm">hplip-hpijs-3.16.11-enh1.x86_64.rpm</A>
<LI><A HREF="https://jbechtel.net/static/site/tricks/hplip_enhanced/hplip-sane-3.16.11-enh1.x86_64.rpm">hplip-sane-3.16.11-enh1.x86_64.rpm</A>
</UL>


<H3>Version info</H3>

<P>
Text from 17 dec 2016, download links updated in October 2018
</P>

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