<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META content="text/html; charset=us-ascii" http-equiv=Content-Type>
<META name=GENERATOR content="MSHTML 8.00.6001.18812"></HEAD>
<BODY>
<DIV><SPAN class=625025515-09082009><FONT size=2 face=Arial>I've been working
with the sample Zoomify.js from <A
href="http://trac.openlayers.org/attachment/ticket/1285/zoomify.patch">http://trac.openlayers.org/attachment/ticket/1285/zoomify.patch</A> and
modifying it to support my company's server product.</FONT></SPAN></DIV>
<DIV><SPAN class=625025515-09082009><FONT size=2 face=Arial>The sample code only
supported 256 x 256 pixel tiles, but Zoomify supports other tile sizes. In
particular, the files we work with (Aperio SVS Digital Pathology slides) come
with standard tile sizes of 240x240, 256x256, 480x480 and 512x512. Our
server generates virtual Zoomify tiles from the original tiled, pyramidal
TIFF files and transcodes from JPEG 2000 as required.</FONT></SPAN></DIV>
<DIV><SPAN class=625025515-09082009><FONT size=2
face=Arial></FONT></SPAN> </DIV>
<DIV><SPAN class=625025515-09082009><FONT size=2 face=Arial>Modified code which
supports other tile sizes is at <A
href="http://images.objectivepathology.com/lib/OpenLayers/Layer/Zoomify.js">http://images.objectivepathology.com/lib/OpenLayers/Layer/Zoomify.js</A>.
This code includes some additions only supported by our server and not available
under Zoomify. The non-standard additions are noted in the
comments.</FONT></SPAN></DIV>
<DIV><SPAN class=625025515-09082009><FONT size=2
face=Arial></FONT></SPAN> </DIV>
<DIV><SPAN class=625025515-09082009><FONT size=2 face=Arial>If and when you
incorporate Zoomify.js into the main build I encourage you to support all
reasonably available tile sizes.</FONT></SPAN></DIV>
<DIV><SPAN class=625025515-09082009><FONT size=2
face=Arial></FONT></SPAN> </DIV>
<DIV><SPAN class=625025515-09082009><FONT size=2 face=Arial>Sample image using
240x240 pixel tiles is at <A
href="http://images.objectivepathology.com/zoomNoFlash.aspx?zoomtarget=/OAP2008/Folpe-1">http://images.objectivepathology.com/zoomNoFlash.aspx?zoomtarget=/OAP2008/Folpe-1</A> Original
file is 65,966 x 44,501 pixels.</FONT></SPAN></DIV>
<DIV><SPAN class=625025515-09082009><FONT size=2 face=Arial>Sample image using
480x480 pixel tiles is at <A
href="http://images.objectivepathology.com/zoomNoFlash.aspx?zoomtarget=/BPI/Breast%205x7%20-%2020x">http://images.objectivepathology.com/zoomNoFlash.aspx?zoomtarget=/BPI/Breast%205x7%20-%2020x</A> Original
is 279,474x219,474 pixels (BigTIFF format).</FONT></SPAN></DIV>
<DIV><SPAN class=625025515-09082009><FONT size=2
face=Arial></FONT></SPAN> </DIV>
<DIV><SPAN class=625025515-09082009></SPAN><SPAN class=625025515-09082009><FONT
size=2 face=Arial>You will notice that the overview doesn't zoom in as you zoom
into the image. This is by design as we prefer to have the full image overview
at all times.</FONT></SPAN></DIV>
<DIV><SPAN class=625025515-09082009><FONT size=2 face=Arial>The horizontal
control bar is based on the original PanZoom code.</FONT></SPAN></DIV>
<DIV><SPAN class=625025515-09082009><FONT size=2
face=Arial></FONT></SPAN> </DIV>
<DIV><SPAN class=625025515-09082009><FONT size=2 face=Arial>Alan
Page</FONT></SPAN></DIV>
<DIV><SPAN class=625025515-09082009><FONT size=2
face=Arial></FONT></SPAN> </DIV>
<DIV><SPAN class=625025515-09082009><FONT size=2 face=Arial>Objective Pathology
Services</FONT></SPAN></DIV>
<DIV><SPAN class=625025515-09082009><FONT size=2
face=Arial></FONT></SPAN> </DIV>
<DIV><SPAN class=625025515-09082009><FONT size=2
face=Arial></FONT></SPAN> </DIV>
<DIV><SPAN class=625025515-09082009><FONT size=2
face=Arial></FONT></SPAN> </DIV></BODY></HTML>