SCM

[#315045] Canon LiDE 60 (genesys GL841) has noise on the image with 1.0.24

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Date:
2015-04-16 12:54
Priority:
3
State:
Open
Submitted by:
Simon Arlott (sa.me.uk-guest)
Assigned to:
Nobody (None)
Category:
backends (drivers)
Group:
None
Resolution:
None
Summary:
Canon LiDE 60 (genesys GL841) has noise on the image with 1.0.24

Detailed description
Scanning a blank white page with --resolution 300 --mode Lineart results in noise in consistent places in the image.

1.0.23 is ok
1.0.24 has noise
git master (f6896e0de481fad5c63bf7ffc271aca89b9cbb01) is even worse

ff58b225bf7dde2bb3d981b22a13293c37c10352 is the cause between 1.0.23 and 1.0.24
"git1.tar.xz" is a collection of scanned images for each bisected git revision

e79a94db5e5d45e214cdbb614426a5df2ae22943 is the cause after 1.0.24
"git2.tar.xz" is a collection of scanned images for each bisected git revision

Followups: Sort comments antichronologically

Message
Date: 2015-04-16 16:15
Sender: Simon Arlott

ff58b225bf7dde2bb3d981b22a13293c37c10352:
The calculation of "rise" in load_lut() has been modified for genesys_enhance() to implement contrast/brightness adjustment, but load_lut() is also used for lineart mode.

e79a94db5e5d45e214cdbb614426a5df2ae22943:
sanei_genesys_get_double(reg,REG_EXPG,&expb); <-- this should be REG_EXPB not REG_EXPG

The default color_filter has changed from Green to None, which is unexpected in lineart mode.
When the color_filter is "None", the LEDADD code is causing the scanner's LED to be red only. It should be white. This happens even in greyscale mode.
Date: 2017-04-04 12:29
Sender: Olaf Meeuwissen

The person assigned to this tracker item is no longer a member of the project.

Attached Files:

Attachments:
Size Name Date By Download
1.86 MiBgit2.tar.xz2015-04-16 12:54sa.me.uk-guestgit2.tar.xz
211 KiBgit1.tar.xz2015-04-16 12:54sa.me.uk-guestgit1.tar.xz

Changes:

Field Old Value Date By
assigned_tostefdev-guest2017-04-04 12:29olaf-guest
assigned_tonone2015-07-31 06:22stefdev-guest
File Added6814: git2.tar.xz2015-04-16 12:54sa.me.uk-guest
File Added6813: git1.tar.xz2015-04-16 12:54sa.me.uk-guest
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