From bgilbert at cs.cmu.edu  Mon May 25 14:09:50 2026
From: bgilbert at cs.cmu.edu (Benjamin Gilbert)
Date: Mon, 25 May 2026 13:09:50 -0500
Subject: Request for NDPI sample with three-character reference tag
Message-ID: <CANioFnhSXn+xOKyJ6--ZiJq4uOddxYpQn+=e6rhb=wcrfnPMZQ@mail.gmail.com>

Hi all,

I'm looking for an NDPI slide with a reference tag (the user-supplied
slide identification number, reflected in OpenSlide's
`hamamatsu.Reference` property) that is one to three characters long.
There's an ambiguity in the NDPI format this would help to clear up.
If anyone knows of such a sample or can create one, please post a link
here or submit it to our upload form at
<https://openslide.org/submit/>.

Thanks!
--Benjamin Gilbert

From mathieu.malaterre at gmail.com  Tue May 26 05:32:48 2026
From: mathieu.malaterre at gmail.com (Mathieu Malaterre)
Date: Tue, 26 May 2026 11:32:48 +0200
Subject: Request for NDPI sample with three-character reference tag
In-Reply-To: <CANioFnhSXn+xOKyJ6--ZiJq4uOddxYpQn+=e6rhb=wcrfnPMZQ@mail.gmail.com>
References: <CANioFnhSXn+xOKyJ6--ZiJq4uOddxYpQn+=e6rhb=wcrfnPMZQ@mail.gmail.com>
Message-ID: <CA+7wUsxz-xerNPGcVW8LZiG8n_+VB3AQXoOkGzkDd_A_De4v1w@mail.gmail.com>

Hi Benjamin,

Le lun. 25 mai 2026 ? 20:10, Benjamin Gilbert <bgilbert at cs.cmu.edu> a ?crit :
>
> Hi all,
>
> I'm looking for an NDPI slide with a reference tag (the user-supplied
> slide identification number, reflected in OpenSlide's
> `hamamatsu.Reference` property) that is one to three characters long.
> There's an ambiguity in the NDPI format this would help to clear up.
> If anyone knows of such a sample or can create one, please post a link
> here or submit it to our upload form at
> <https://openslide.org/submit/>.

Could you be a bit more specific about the request ? For instance what
is wrong with:

% curl -O https://openslide.cs.cmu.edu/download/openslide-testdata/Hamamatsu/OS-2.ndpi
% tiffdump OS-2.ndpi| grep 65427
65427 (0xff93) ASCII (2) 7<477130\0>
65427 (0xff93) ASCII (2) 7<477130\0>
65427 (0xff93) ASCII (2) 7<477130\0>
65427 (0xff93) ASCII (2) 7<477130\0>
65427 (0xff93) ASCII (2) 7<477130\0>
65427 (0xff93) ASCII (2) 7<477130\0>
65427 (0xff93) ASCII (2) 7<477130\0>
65427 (0xff93) ASCII (2) 7<477130\0>
65427 (0xff93) ASCII (2) 7<477130\0>
65427 (0xff93) ASCII (2) 7<477130\0>
65427 (0xff93) ASCII (2) 7<477130\0>
65427 (0xff93) ASCII (2) 7<477130\0>



Thank you

From mathieu.malaterre at gmail.com  Tue May 26 06:00:29 2026
From: mathieu.malaterre at gmail.com (Mathieu Malaterre)
Date: Tue, 26 May 2026 12:00:29 +0200
Subject: Request for NDPI sample with three-character reference tag
In-Reply-To: <CA+7wUsxz-xerNPGcVW8LZiG8n_+VB3AQXoOkGzkDd_A_De4v1w@mail.gmail.com>
References: <CANioFnhSXn+xOKyJ6--ZiJq4uOddxYpQn+=e6rhb=wcrfnPMZQ@mail.gmail.com>
 <CA+7wUsxz-xerNPGcVW8LZiG8n_+VB3AQXoOkGzkDd_A_De4v1w@mail.gmail.com>
Message-ID: <CA+7wUsw4m448rP20UTiqogUgX_H3Ykzz28+NsQsXUaG2hfMSWw@mail.gmail.com>

Le mar. 26 mai 2026 ? 11:32, Mathieu Malaterre
<mathieu.malaterre at gmail.com> a ?crit :
>
> Hi Benjamin,
>
> Le lun. 25 mai 2026 ? 20:10, Benjamin Gilbert <bgilbert at cs.cmu.edu> a ?crit :
> >
> > Hi all,
> >
> > I'm looking for an NDPI slide with a reference tag (the user-supplied
> > slide identification number, reflected in OpenSlide's
> > `hamamatsu.Reference` property) that is one to three characters long.
> > There's an ambiguity in the NDPI format this would help to clear up.
> > If anyone knows of such a sample or can create one, please post a link
> > here or submit it to our upload form at
> > <https://openslide.org/submit/>.
>
> Could you be a bit more specific about the request ? For instance what

 oh, I see you do want out-of-line values. I guess you need real data
instead of fuzzed-one derived from OS-2.ndpi.

Sorry for the noise.

From bgilbert at cs.cmu.edu  Sat May 30 00:28:35 2026
From: bgilbert at cs.cmu.edu (Benjamin Gilbert)
Date: Fri, 29 May 2026 23:28:35 -0500
Subject: Request for NDPI sample with three-character reference tag
In-Reply-To: <CA+7wUsw4m448rP20UTiqogUgX_H3Ykzz28+NsQsXUaG2hfMSWw@mail.gmail.com>
References: <CANioFnhSXn+xOKyJ6--ZiJq4uOddxYpQn+=e6rhb=wcrfnPMZQ@mail.gmail.com>
 <CA+7wUsxz-xerNPGcVW8LZiG8n_+VB3AQXoOkGzkDd_A_De4v1w@mail.gmail.com>
 <CA+7wUsw4m448rP20UTiqogUgX_H3Ykzz28+NsQsXUaG2hfMSWw@mail.gmail.com>
Message-ID: <CANioFnibFbH3n6M27N0NtL8B_=UOgA-MypJMr1ODo9K=xTyxCg@mail.gmail.com>

On Tue, May 26, 2026 at 5:00?AM Mathieu Malaterre
<mathieu.malaterre at gmail.com> wrote:
>  oh, I see you do want out-of-line values. I guess you need real data
> instead of fuzzed-one derived from OS-2.ndpi.

Right.  It seems NDPI always stores ASCII values out-of-line, even
when TIFF would store them inline.

The new sample is posted at
<https://openslide.cs.cmu.edu/download/openslide-testdata/Hamamatsu/Hamamatsu-2.ndpi>.
Thanks again to the contributors who collected that sample and
submitted it to the project.

Cheers,
--Benjamin Gilbert