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1868.html
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
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<title>
#1868 (Take advantage of cell iteration order)
– ImageJ
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<p style="margin: 0.4em">
NOTICE! This is a static HTML version of a legacy ImageJ Trac ticket.
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<div id="content" class="ticket">
<h1 id="trac-ticket-title">
<a href="1868.html">Ticket #1868</a>
<span class="status">(new enhancement)</span>
</h1>
<div id="ticket">
<div class="date">
<p>Opened 2013-05-14T13:44:29-05:00</p>
<p>Last modified 2013-09-24T15:25:10-05:00</p>
</div>
<h2 class="summary searchable">Take advantage of cell iteration order</h2>
<table class="properties">
<tr>
<th id="h_reporter">Reported by:</th>
<td headers="h_reporter" class="searchable">
hinerm
</td>
<th id="h_owner">Owned by:</th>
<td headers="h_owner">
hinerm
</td>
</tr>
<tr>
<th id="h_priority">
Priority:
</th>
<td headers="h_priority">
major
</td>
<th id="h_milestone">
Milestone:
</th>
<td headers="h_milestone">
imagej2-b10-compatibility
</td>
</tr><tr>
<th id="h_component">
Component:
</th>
<td headers="h_component">
SCIFIO
</td>
<th id="h_version">
Version:
</th>
<td headers="h_version">
</td>
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<th id="h_severity">
Severity:
</th>
<td headers="h_severity">
serious
</td>
<th id="h_keywords">
Keywords:
</th>
<td headers="h_keywords" class="searchable">
Cells
</td>
</tr><tr>
<th id="h_cc">
Cc:
</th>
<td headers="h_cc" class="searchable">
</td>
<th id="h_blockedby">
Blocked By:
</th>
<td headers="h_blockedby">
</td>
</tr><tr>
<th id="h_blocking">
Blocking:
</th>
<td headers="h_blocking">
<a class="new" href="1968.html" title="Recommended architecture changes [compatibility]">#1968</a>
</td>
<th>
</th>
<td>
</td>
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</table>
<div class="description">
<h3 id="comment:description">
Description
</h3>
<div class="searchable">
<p>
Currently, the DefaultDatasetView's use of an ARGBScreenImage (which is an ArrayImage) forces a flat iteration order, which may cause <br />
(image height) * (image width / cell width)<br />
cell loading events, as the CellIterationOrder is not being used.<br />
</p>
<p>
To properly leverage the CellIterationOrder, I believe a new ScreenImageType that uses a CellImage instead of ArrayImage will need to be created and accepted by the DefaultDatasetView.<br />
</p>
<p>
It could probably just use the default CellImg in imglib2, and should not extend SCIFIOCellImg due to its use of a Reader to dynamically load requested areas, as this ScreenImage is more of a blank canvas that will be populated by a SCIFIOCellImg.<br />
</p>
<p>
If the cells are of the same size, then the CellSreenImage should be able to just use its cursor's "next()" method to efficiently iterate over its cells, localizing and reading a cursor from a SCIFIOCellImg at each step.<br />
</p>
</div>
</div>
</div>
<div>
<h2 class="foldable">Change History</h2>
<div id="changelog">
<div class="change" id="trac-change-1">
<h3 class="change">
<span class="threading">
<span id="comment:1" class="cnum">
<a href="#comment:1">comment:1</a>
</span>
</span>
Changed 2013-07-25T14:18:17-05:00 by hinerm
</h3>
<ul class="changes">
<li>
<strong>Milestone</strong>
changed from <em>imagej2-unscheduled</em> to <em>imagej2-b10-compatibility</em>
</li>
</ul>
<div class="comment searchable">
</div>
</div>
<div class="change" id="trac-change-2">
<h3 class="change">
<span class="threading">
<span id="comment:2" class="cnum">
<a href="#comment:2">comment:2</a>
</span>
</span>
Changed 2013-09-24T15:25:10-05:00 by bdezonia
</h3>
<ul class="changes">
<li>
<strong>Blocking</strong>
<em>1968</em> added
</li>
</ul>
<div class="comment searchable">
</div>
</div>
</div>
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