[sane-devel] HP Scanjet 3670 bad colors

Stef stef.dev at free.fr
Tue Apr 1 03:37:11 UTC 2014

On 31/03/2014 18:14, Octavio Alvarez wrote:
> On 03/31/2014 07:34 AM, Stef wrote:
>>      the problem is coming from incorrect calibration by the backend.
>> Gain is too high. Could you please run SANE 1.0.24 backend version with
>> traces enabled, and send me log file and *.pnm files created during
>> calibration ?
>> In a command shell type:
>> export SANE_DEBUG_GENESYS=255
>> export SANE_DEBUG_GENESYS_GL646=255
>> export SANE_DEBUG_GENESYS_GL841=255
>> scanimage -d genesys --resolution 75 --preview --mode Color
>> 2>preview.log >preview.pnm
> I took some samples, even one with --resolution 150 and uploaded them here:
> http://blog.alvarezp.org/files/scan-hp3670/hp-sj3670-samples-1.tar.gz
> Some of those came out ok, some didn't. Only --resolution 150 threw out
> a full set of pnm calibration files. --resolution 175 only threw out
> warmup*.pnm files.

     thanks for all the data. It'll take me a couple of days to analyze 
them and compare with the results of my hp3670.


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