simple-scan-team team mailing list archive

[DemoFreak <983441@xxxxxxxxxxxxxxxxxx>]

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As I figured out just now, the sane tools behave different regarding the
resolution:

- xsane respects the selected resolution (tested with 300, 600 and
1200dpi). The output files differs in size by factor 4, as expected.

-rw-r----- 1 hannes users 25658079 14. Apr 19:36 test0001.pnm
-rw-r----- 1 hannes users 102666906 14. Apr 19:37 test0002.pnm
-rw-r----- 1 hannes users 410624709 14. Apr 19:38 test0003.pnm

- scanimage always scans with 600dpi (like simple-scan does), regardless
what's given by --resolution parameter. The output files are similar in
size.

hannes@gurkenkiste:~> scanimage -d pixma:04A91908 --resolution 300 --mode Color --source Flatbed >test1
hannes@gurkenkiste:~> scanimage -d pixma:04A91908 --resolution 600 --mode Color --source Flatbed >test2
hannes@gurkenkiste:~> scanimage -d pixma:04A91908 --resolution 1200 --mode Color --source Flatbed >test3

-rw-r--r-- 1 hannes users 107429029 14. Apr 19:51 test1
-rw-r--r-- 1 hannes users 107429029 14. Apr 19:51 test2
-rw-r--r-- 1 hannes users 107429029 14. Apr 19:51 test3

So it seems the problem is located in an interaction of the scan
frontend and the sane backend (as scanimage/simple-scan are able to scan
with the configured resolution when using other devices, and on the
other hand xsane is able to scan the desired resolution with _this_
specific device).

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You received this bug notification because you are a member of Simple
Scan Development Team, which is the registrant for Simple Scan.
https://bugs.launchpad.net/bugs/983441

Title:
  Simple-scan ignores resolution selection

Status in Simple Scan:
  New

Bug description:
  As suggested by Michael Nagel, i splitted this issue from
  https://bugs.launchpad.net/simple-scan/+bug/891586 as it seems to be a
  different problem.

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  Canon CanoScan 9000F
  sane-backends 1.0.23
  simple-scan 3.2.1/3.4.0

  - scanning a document in several resolutions (300, 600, 1200dpi) results in output files of same size, all seems to be scanned at 600dpi
  - scanner noise sounds equal (while normally sounds "faster" at 300dpi and much "slowlier" at 1200dpi)
  - when saved as PDF, only the 600dpi scan has the correct screen size at 100% scale
  - "crop to A4 size" from menu only works correct at 600dpi, when scanning at other resolutions the cropped area is too small/too big

  Scanning with xsane and skanlite works correct on all resolutions, so
  it seems to be a simple-scan problem.

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