Re: SANE_FRAME_IR

Ralph Little <[email protected]> Wed, 22 Jul 2026 17:47:45 -0700
Newsgroups	gmane.comp.graphics.scanning.sane.devel
Message-ID	<[email protected]>
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Hi,

On 2026-07-22 16:20, Benjamin Gordon wrote:
> On Wed, Jul 22, 2026 at 11:33 AM Ralph Little <[email protected]> wrote:
>
>     .....
>     Views? Any appetite for an update to the SANE Standard? I'm sure
>     there
>     are a few things that people would like to add.
>
>
> If there's the possibility of re-opening the standard, I for one would 
> like to consider a more general handling of frame formats.  All the 
> scanners that support eSCL these days can return JPEG directly, and 
> some of them can even return a whole PDF at once.  It would be great 
> for the frontend to be able to negotiate some sort of passthrough mode 
> instead of decoding these and then re-encoding in the frontend.
>
> Thanks,
> Benjamin
>

Many pixma machines return JPEG from ADF scan, but bizarrely not from 
the flatbed. The pixma currently has to unpack the JPEG to return RGB in 
this case.
One of life's little curios that will ever likely be a mystery.

Cheers,
Ralph
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    Hi,<br>
    <br>
    <div class="moz-cite-prefix">On 2026-07-22 16:20, Benjamin Gordon
      wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:CADaYBq3LeEU=oaE--mVM1bb8Unv1Cjj1E1DmodtOHQEp1pv_LA@mail.gmail.com">
      <meta http-equiv="content-type" content="text/html; charset=UTF-8">
      <div dir="ltr">
        <div dir="ltr"><span style="background-color:transparent">On
            Wed, Jul 22, 2026 at 11:33 AM Ralph Little &lt;<a
              href="mailto:[email protected]" moz-do-not-send="true"
              class="moz-txt-link-freetext">[email protected]</a>&gt;
            wrote:</span></div>
        <div class="gmail_quote gmail_quote_container">
          <blockquote class="gmail_quote"
style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">.....<br>
            Views? Any appetite for an update to the SANE Standard? I'm
            sure there <br>
            are a few things that people would like to add.<br>
          </blockquote>
          <div><br>
          </div>
          <div>If there's the possibility of re-opening the standard, I
            for one would like to consider a more general handling of
            frame formats.  All the scanners that support eSCL these
            days can return JPEG directly, and some of them can even
            return a whole PDF at once.  It would be great for the
            frontend to be able to negotiate some sort of passthrough
            mode instead of decoding these and then re-encoding in the
            frontend.</div>
          <div><br>
          </div>
          <div>Thanks,</div>
          <div>Benjamin</div>
          <div><br>
          </div>
        </div>
      </div>
    </blockquote>
    <br>
    Many pixma machines return JPEG from ADF scan, but bizarrely not
    from the flatbed. The pixma currently has to unpack the JPEG to
    return RGB in this case. <br>
    One of life's little curios that will ever likely be a mystery.<br>
    <br>
    Cheers,<br>
    Ralph
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