You have been subscribed to a public bug:
The scan results from almost all the scan programs (simple-scan,
scanimage, hp-scan) are way too light, faded, and missing details when
scanning with my MFP M177fw from Linux (Debian 7.8 x86), so I've tried
to adjust brightness and contrast settings from the command line, like
this:
hp-scan -b -500 -c -10 or this:
scanimage -d hpaio:/net/HP_Color_LaserJet_Pro_MFP_M177fw?ip=10.1.1.23 --mode
Gray --resolution 300 --contrast 20 --brightness 500 -vvvvv
Tried scanning in different modes (Gray and Color) and resolutions
(150/300/600), and also compression modes. In color mode neither the
contrast, nor the brightness settings had any effect (tried -1000, -500,
0, 500, 1000 and even far out of range). In gray mode the contrast
worked, but not the brightness. With turning SANE and other debug
switches on, it looks like the command is sent to SANE (even looks
accepted), but it has no effect (see logs below).
This might be a problem with the scanner or with the driver, I can't
tell. This is my third HP MFP printer, and never had similar problems
with hplip scanning.
The output from hp-check is attached (latest hplip as of today, also
latest available firmware for printer/scanner), and I can send sample
images if necessary. (Showing the lack of difference)
The output from hp-scan:
HP Linux Imaging and Printing System (ver. 3.15.2)
Scan Utility ver. 2.2
Copyright (c) 2001-15 Hewlett-Packard Development Company, LP
This software comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to distribute it
under certain conditions. See COPYING file for more details.
hp-scan[26965]: debug: getDeviceUri(None, None, ['hpaio'], {'scan-type':
(<built-in function gt>, 0)}, , True)
hp-scan[26965]: debug: Mode=0
hp-scan[26965]: debug: Cache miss: hp_color_laserjet_pro_mfp_m177fw
hp-scan[26965]: debug: Reading file: /usr/share/hplip/data/models/models.dat
hp-scan[26965]: debug: Searching for section [hp_color_laserjet_pro_mfp_m177fw]
in file /usr/share/hplip/data/models/models.dat
hp-scan[26965]: debug: Found section [hp_color_laserjet_pro_mfp_m177fw] in file
/usr/share/hplip/data/models/models.dat
hp-scan[26965]: debug:
{'hpaio:/net/HP_Color_LaserJet_Pro_MFP_M177fw?ip=10.1.1.23': ['lucky',
'lucky-color']}
Using device: hpaio:/net/HP_Color_LaserJet_Pro_MFP_M177fw?ip=10.1.1.23
warning: No destinations specified. Adding 'file' destination by default.
Using device hpaio:/net/HP_Color_LaserJet_Pro_MFP_M177fw?ip=10.1.1.23
Opening connection to device...
hp-scan[26965]: debug: Supported source Options: ['Flatbed', 'ADF'] size=2
hp-scan[26965]: debug: Device supported resolutions [75, 100, 150, 200, 300,
600, 1200]
Resolution: 300dpi
Mode: gray
Compression: JPEG
Contrast: 10
Brightness: -1000
Scan area (mm):
Top left (x,y): (0.000000mm, 0.000000mm)
Bottom right (x,y): (215.899994mm, 296.925995mm)
Width: 215.899994mm
Height: 296.925995mm
Destination(s): file
Output file:
hp-scan[26965]: debug: Supported modes: ['lineart', 'gray', 'color'] size=3
warning: File destination enabled with no output file specified.
Setting output format to PNG for greyscale mode.
warning: Defaulting to '/fhome/zpeller/hpscan010.png'.
Warming up...
Scanning...
hp-scan[26965]: debug: expected_bytes = 8936794
hp-scan[26965]: debug: format=0
hp-scan[26965]: debug: Expecting to read 8.5 MB from scanner.
hp-scan[26965]: debug: format_name=gray
hp-scan[26965]: debug: last_frame=1
hp-scan[26965]: debug: ppl=2549
hp-scan[26965]: debug: lines=3506
hp-scan[26965]: debug: depth=8
hp-scan[26965]: debug: bpl=2549
hp-scan[26965]: debug: byte_format=RGBA
hp-scan[26965]: debug: pad_bytes=0
hp-scan[26965]: debug: Gray Read 2549 bytes
hp-scan[26965]: debug: Gray Read 5098 bytes
...
hp-scan[26965]: debug: Gray Read 8934245 bytes
hp-scan[26965]: debug: Gray Read 8936794 bytes
hp-scan[26965]: debug: Scan thread exiting...
Read 8.5 MB from scanner.
hp-scan[26965]: debug: PPL=2549 lines=3506 depth=8 BPL=2549 pad=0
total_read=8936794 total_write=35747176
Closing device.
Outputting to destination 'file':
Saving to file /fhome/zpeller/hpscan010.png
Done.
** Affects: hplip
Importance: Undecided
Status: New
** Affects: hplip (Ubuntu)
Importance: Undecided
Status: New
--
Brightness setting unaffective when scanning with MFP M177fw
https://bugs.launchpad.net/bugs/1424451
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to hplip in Ubuntu.
--
Mailing list: https://launchpad.net/~desktop-packages
Post to : desktop-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~desktop-packages
More help : https://help.launchpad.net/ListHelp
