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<p>OK. So it seems, the backend should be forced to png or
octet-stream (hopefully lossless), if the frontend requires to
compress to TIFF.<br>
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<div class="moz-cite-prefix">Am 15.12.19 um 20:16 schrieb Thierry
Hucard:<br>
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<div dir="auto">No the backend receives the scanner data (the jpeg
format always seems to be present), it can be jpeg, png, pdf or
octet-stream. I didn't see any tiff. The data is compressed and
sent back to the frontend.<br>
<br>
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<div class="gmail_quote">Le 15 déc. 2019, à 19:56, Ulf Zibis <<a
href="mailto:ulf.zibis@gmx.de" target="_blank"
moz-do-not-send="true">ulf.zibis@gmx.de</a>> a écrit:
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Am 15.12.19 um 19:43 schrieb <a class="moz-txt-link-abbreviated" href="mailto:thierry@ordissimo.com">thierry@ordissimo.com</a>:
<blockquote class="gmail_quote" style="margin: 0pt 0pt 1ex 0.8ex; border-left: 1px solid #729fcf; padding-left: 1ex;"> Le 2019-12-15 18:34, Ulf Zibis a écrit :
<blockquote class="gmail_quote" style="margin: 0pt 0pt 1ex 0.8ex; border-left: 1px solid #ad7fa8; padding-left: 1ex;"> Hi List,
Am 15.12.19 um 09:10 schrieb Olaf Meeuwissen:
<blockquote class="gmail_quote" style="margin: 0pt 0pt 1ex 0.8ex; border-left: 1px solid #8ae234; padding-left: 1ex;">
The backend currently only supports image data transfer in JPEG format
but Thierry indicated he wanted to add support for PNG and PDF as well.
</blockquote>
Would it be possible to also support the TIFF format, as for black&white
it is the best compressing with Fax G4 compression?
</blockquote>
I didn't see any device managing Tiff, send me the capability file, I
could add the support.
curl http://<ip>:<port>/eSCL/ScannerCapabilities
or
curl -k https://<ip>:<port>/eSCL/ScannerCapabilities
</blockquote>
In my understanding, it's not the scanner, which supports the TIFF
format, but it has to send raw (or lossless compressed) format, so sane
or the sane frontend could compress to TIFF.
-Ulf
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