<div dir="ltr"><div>Hi,</div><div><br></div><div>thank you Benjamin for clarification! I used virtual filesystems backed by HTTP to serve images to our new Openslide based Imageviewer ( <a href="http://get.precipoint.de/viewpoint/">http://get.precipoint.de/viewpoint/</a> ). </div><div>The best tool I tested (concerning performance) was netdrive. Unfortunately it is not a free solution.</div><div><br></div><div>Best regards,</div><div>Andi</div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">2016-04-15 18:00 GMT+02:00  <span dir="ltr"><<a href="mailto:openslide-users-request@lists.andrew.cmu.edu" target="_blank">openslide-users-request@lists.andrew.cmu.edu</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Send openslide-users mailing list submissions to<br>
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Today's Topics:<br>
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   1. Re: URL Support (Benjamin Gilbert)<br>
<br>
<br>
----------------------------------------------------------------------<br>
<br>
Message: 1<br>
Date: Thu, 14 Apr 2016 20:08:27 -0400<br>
From: Benjamin Gilbert <<a href="mailto:bgilbert@cs.cmu.edu">bgilbert@cs.cmu.edu</a>><br>
To: <a href="mailto:openslide-users@lists.andrew.cmu.edu">openslide-users@lists.andrew.cmu.edu</a><br>
Subject: Re: URL Support<br>
Message-ID: <<a href="mailto:20160415000825.GA5927@hyliota.hl.backtick.net">20160415000825.GA5927@hyliota.hl.backtick.net</a>><br>
Content-Type: text/plain; charset=utf-8<br>
<br>
On Thu, Apr 14, 2016 at 04:40:33PM +0200, Andreas Schmid via openslide-users wrote:<br>
> I am wondering if it would be possible to adapt the Openslide library to<br>
> support also url?s?<br>
><br>
> I was able to partially read a zip file via a seekable http range stream.<br>
><br>
> I think reading WSI-Formats over http without a tileserver would be amazing.<br>
<br>
Hi Andi,<br>
<br>
In principle it should be possible, but it would be a lot of work.  The<br>
entire library revolves around opening and reading files, so a lot of code<br>
would need to be changed.  In addition, performance would probably not be<br>
very good, since every read access would need to go to a server potentially<br>
tens of milliseconds away.  A good cache could help to some extent, but<br>
OpenSlide's reads can be small, numerous, and random, so the problem is<br>
non-trivial.  We've considered HTTP support in the past, but concluded that<br>
putting a tile server next to the data would be more efficient.<br>
<br>
It's also possible to implement something like this without modifying<br>
OpenSlide, by reading slide files from a virtual filesystem backed by HTTP.<br>
There should be existing FUSE filesystems that would work.<br>
<br>
--Benjamin Gilbert<br>
<br>
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Subject: Digest Footer<br>
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End of openslide-users Digest, Vol 75, Issue 7<br>
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</blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature"><div dir="ltr"><img src="https://docs.google.com/uc?export=download&id=0B3PrOUF8qyDfTHN5Q3dyR0JkVGM&revid=0B3PrOUF8qyDfZ1pjSzlud2tIcXZRNVZIcEh1dDQrbEhNNGI0PQ" height="45" width="200" style="font-size:12.8px"><br style="font-size:12.8px"><span style="font-size:12.8px">______________________________</span><span style="font-size:12.8px">____</span><br style="font-size:12.8px"><br style="font-size:12.8px"><b style="font-size:12.8px">Andreas Schmid </b><span style="font-size:12.8px">(</span><span style="font-weight:bold;color:rgb(68,68,68);font-size:small;line-height:18.2px">Dipl</span><span style="color:rgb(84,84,84);font-size:small;line-height:18.2px">.-</span><span style="font-weight:bold;color:rgb(68,68,68);font-size:small;line-height:18.2px">Ing</span><span style="color:rgb(84,84,84);font-size:small;line-height:18.2px">. </span><span style="font-weight:bold;color:rgb(68,68,68);font-size:small;line-height:18.2px">FH</span><span style="font-size:12.8px">)</span><br style="font-size:12.8px"><div style="font-size:12.8px">Development<br><br></div><div style="font-size:12.8px"><div>Tel:  <a value="+4981619769793">+49 (0)8161 976979-0</a><br>Fax: <a value="+4981619769791">+49 (0)8161 976979-7</a><br>Mail: <a href="mailto:martina.leibig@precipoint.de" style="color:rgb(17,85,204)" target="_blank">andreas.schmid@precipoint.de</a><br>__________________________________<br> <span style="font-size:12.8px"> </span></div><div style="font-size:12.8px">PreciPoint GmbH<br>Alois-Steinecker-Str. 22<br>85354 Freising bei München<br><span style="font-family:arial,helvetica,sans-serif"><a href="http://www.precipoint.de/" style="color:rgb(17,85,204)" target="_blank">http://www.precipoint.de</a></span><span style="font-family:arial,helvetica,sans-serif"></span></div><br style="font-size:12.8px"><div style="font-size:12.8px"><ul style="margin:0px;padding:0px;list-style:none outside none;width:960px;color:rgb(255,255,255);font-family:Arial;font-size:12px"><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px"><span style="font-family:arial,helvetica,sans-serif">Geschäftsführer:</span></div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px"><span style="font-family:arial,helvetica,sans-serif">Helmut Krönauer (Dipl. Ing. FH)</span></div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px"><span style="font-family:arial,helvetica,sans-serif"><br></span></div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px"><div style="font-size:12.8px"><span style="font-family:arial,helvetica,sans-serif">Amtsgericht München</span></div><div style="font-size:12.8px"><span style="font-family:arial,helvetica,sans-serif">HRB 69798</span></div><div style="font-size:12.8px"><span style="font-family:arial,helvetica,sans-serif">UST ID: DE 129351217</span></div></div></ul></div></div></div></div>
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