Re: [gscan2pdf-help] Resolution options with Epson Workforce 645 all in one

[Jim M. <ji...@pe...>]

Hi Jeff,

Thank you. As you suggested, I've submitted a bug against scanimage:

https://alioth.debian.org/tracker/index.php?func=detail&aid=315651&group_id=30186&atid=410366

-- Jim

On Sat, Mar 11, 2017 at 5:36 AM, Jeff <jf...@po...> wrote:

> On 10/03/17 19:59, Jim Mayer wrote:
> > [jmayer@bigbrick out]$ scanimage --x-resolution 150 --y-resolution 150
> > --resolution 75 --format tiff > scan001.tif
> > [jmayer@bigbrick out]$ scanimage --y-resolution 300 --resolution 75
> > --x-resolution 150 --format tiff > scan002.tif
> > [jmayer@bigbrick out]$ scanimage --resolution 75 --x-resolution 150
> > --y-resolution 300 --format tiff > scan003.tif
> > [jmayer@bigbrick out]$ tiffinfo scan*.tif
> > scan001.tif:
> > TIFF Directory at offset 0x8 (8)
> >   Subfile Type: (0 = 0x0)
> >   Image Width: 632 Image Length: 877
> >   Resolution: 75, 75 pixels/inch
> >   Bits/Sample: 8
> >   Compression Scheme: None
> >   Photometric Interpretation: RGB color
> >   Orientation: row 0 top, col 0 lhs
> >   Samples/Pixel: 3
> >   Rows/Strip: 877
> >   Min Sample Value: 0
> >   Max Sample Value: 255
> >   Planar Configuration: single image plane
> > scan002.tif:
> > TIFF Directory at offset 0x8 (8)
> >   Subfile Type: (0 = 0x0)
> >   Image Width: 1272 Image Length: 877
> >   Resolution: 75, 75 pixels/inch
> >   Bits/Sample: 8
> >   Compression Scheme: None
> >   Photometric Interpretation: RGB color
> >   Orientation: row 0 top, col 0 lhs
> >   Samples/Pixel: 3
> >   Rows/Strip: 877
> >   Min Sample Value: 0
> >   Max Sample Value: 255
> >   Planar Configuration: single image plane
> > scan003.tif:
> > TIFF Directory at offset 0x8 (8)
> >   Subfile Type: (0 = 0x0)
> >   Image Width: 1272 Image Length: 3509
> >   Resolution: 75, 75 pixels/inch
> >   Bits/Sample: 8
> >   Compression Scheme: None
> >   Photometric Interpretation: RGB color
> >   Orientation: row 0 top, col 0 lhs
> >   Samples/Pixel: 3
> >   Rows/Strip: 3509
> >   Min Sample Value: 0
> >   Max Sample Value: 255
> >   Planar Configuration: single image plane
>
> It looks as though scanimage has a similar bug, as although the images
> have different sizes, the resolution is quoted as the same for all.
> Perhaps it would be worth reporting the bug to SANE.
>
> Otherwise, the logic is what I expected, so I'll do my best to implement
> it.
>
> I'll let you know when I have something for you to test.
>
> Regards
>
> Jeff
>
>