Scan image is "de-interlaced", doubled
Environment: xsane 0.999, kubuntu 20.04
$ scanimage --version
scanimage (sane-backends) 1.0.30-960-gd289b42ad; backend version 1.0.30
$ scanimage -L
device `pixma:04A9173C' is a CANON Canon PIXMA MP490 multi-function peripheral
Now, the problem is that even though I put one paper in the scanner the result image that is shown in xsane contains two papers! The papers are next to eachother in the image, kind of "occupying half the width" each. They're not perfect(it was quite visible when I scanned a photo with persons in it), each paper is half as wide as it should be.
If I scale the image and double its width things look much better. It's like the two papers should be "interlaced" with eachother to create the correct scan image.
Not sure if I can draw this in ascii:
Result image:
-----------------------
| --------- --------- |
| | Half | | Half | |
| | width | | width | |
| | paper | | paper | |
| | | | | |
| --------- --------- |
-----------------------
Scaled version of result image, doubled width:
-----------------------
| ------------------- |
| | Full | |
| | width | |
| | paper | |
| | | |
| ------------------- |
-----------------------