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<base href="http://fiji.sc/bugzilla/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Log of 32-bit Images"
href="http://fiji.sc/bugzilla/show_bug.cgi?id=947">947</a>
</td>
</tr>
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<th>Summary</th>
<td>Log of 32-bit Images
</td>
</tr>
<tr>
<th>Product</th>
<td>Fiji
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Windows
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>minor
</td>
</tr>
<tr>
<th>Priority</th>
<td>P5
</td>
</tr>
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<th>Component</th>
<td>ImageJ2
</td>
</tr>
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<th>Assignee</th>
<td>imagej-bugs@imagej.net
</td>
</tr>
<tr>
<th>Reporter</th>
<td>matthew.morgan.taylor@gmail.com
</td>
</tr></table>
<p>
<div>
<pre>Hope it isn't an issue I'm not including a macro, but it does not get much
simpler than this.
For 32-bit images, pixel values for which the log would be undefined (values
less than or equal to 0) return zero instead of NaN. Since this amounts to
taking pixels of undefined value and plopping them immediately in the middle of
the range of output values (as log is defined for the range (0, infinity]) ,
its more than a little troubling.
If this could be addressed, I'd be quite pleased. I also would be quite happy
if log caused a zero pixel to take on the value negative infinity - even if it
isn't explicitly correct outside of a limit, it is a very useful approximation.
Thanks</pre>
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</p>
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