Simple Scan images are too dark at resolutions > 75ppi.

Bug #1818371 reported by William T. Lowther on 2019-03-02
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
simple-scan (Ubuntu)
Undecided
Unassigned

Bug Description

Ubuntu 18.04.2
Canon Pixma TS6220
These issues are identical to an earlier bug (#1818186) that I reported regarding the operation of Xsane.

1) I am able to move the dashed lines to frame the print to be scanned, but the output always contains the images of what ever is on the platen on a "full size" white background.
2) I have selected “inches” as the unit of measurement, but the preview window has “px” in the upper left corner, and the dimensions in the windows at the bottom of the main menu are in pixels. These dimensions do not change as I adjust the frame of the photo to be scanned and always read 2480*3507*24 (24.9MB).
3) There are no length markings along the side or top of the preview window.
4) In Advanced Options, the UOM displays “px”. The sliders change as I adjust the frame, but for a 4” x 6” photo in the upper left corner, the lower right corner is shown to be .00235x, .00154y.
5) The scanned image of the photos is very dark/saturated – beyond my ability to correct.
6) Max scan resolution in the main menu is only 300, whereas it is 1200 with the HP scanner.
If I can be of any assistance in “testing”, please let me know.
Kind regards,
Bill

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: simple-scan 3.28.0-0ubuntu1
ProcVersionSignature: Ubuntu 4.15.0-45.48-generic 4.15.18
Uname: Linux 4.15.0-45-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
Date: Fri Mar 1 20:59:54 2019
InstallationDate: Installed on 2018-08-04 (210 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
MachineType: Acer Aspire XC-603
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-45-generic root=UUID=5ed3623f-f174-4ac2-b301-9dd35c726d45 ro quiet splash vt.handoff=1
SourcePackage: simple-scan
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/15/2015
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P11-B4
dmi.board.name: Aspire XC-603
dmi.board.vendor: Acer
dmi.chassis.type: 3
dmi.chassis.vendor: Acer
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP11-B4:bd09/15/2015:svnAcer:pnAspireXC-603:pvr:rvnAcer:rnAspireXC-603:rvr:cvnAcer:ct3:cvr:
dmi.product.family: Acer Desktop
dmi.product.name: Aspire XC-603
dmi.sys.vendor: Acer

William T. Lowther (624wtl) wrote :
summary: - Simple Scan does not scan only the area which is framed after "preview"
+ Simple Scan images are too dark at resolutions > 75ppi.
William T. Lowther (624wtl) wrote :

Ubuntu 18.04.2
Canon Pixma TS6220
These issues are similar to an earlier bug (#1818186) that I reported regarding the operation of Xsane.

1) The output always contains the images of what ever is on the platen on a "full size" white background; i.e., unlike scangearmp2, if there is a 4” x 6” photo on the platen, the output is a letter size white background with the 4” x 6” image scaled down.
2) Only images at resolutions of 75 ppi are acceptable. When cropped in Gimp, and size adjusted to 4” x 6”, this works out to 300 ppi. The scanned image of photos at all resolutions greater than 75 ppi are very dark/saturated – beyond my ability to correct.
3) The adjustments for Brightness and Contrast have little, if any, affect on the output for scans at resolutions
> 75 ppi.

If I can be of any assistance in “testing”, please let me know.
Kind regards,
Bill

William T. Lowther (624wtl) wrote :

Please disregard my first bug description in my post #1. Apologies for this confusion.

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