That&#39;s very cool. LIBCVD does something similar in that updates are only made to the histogram for pixels that enter or leave the structuring element as it&#39;s shifted across the image. Any plans to replace erode and dilate with rank.minimum and rank.maximum?<br>


<br>Damian<br><br><div class="gmail_quote">On Wed, Nov 14, 2012 at 10:41 PM, Stéfan van der Walt <span dir="ltr">&lt;<a href="mailto:stefan@sun.ac.za" target="_blank">stefan@sun.ac.za</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">


Hi everyone,<br>
<br>
We just merged an exciting new rank filtering module, implemented by<br>
Olivier Debeir and guided through review by Johannes Schönberger.<br>
These filters work on the principle that, as a sliding window moves<br>
over an image, its histogram can be efficiently updated by considering<br>
only new values introduced (and left behind) by the moving footprint.<br>
<br>
Here are some examples from the gallery:<br>
<br>
<a href="http://scikit-image.org/docs/dev/auto_examples/applications/plot_rank_filters.html" target="_blank">http://scikit-image.org/docs/dev/auto_examples/applications/plot_rank_filters.html</a><br>
<br>
Enjoy!<br>
<span><font color="#888888"><br>
Stéfan<br>
<br>
--<br>
<br>
<br>
</font></span></blockquote></div><br>-- <br>Damian Eads, PhD<br>Research Associate, Machine Intelligence Laboratory<br>Engineering Department, University of Cambridge<br>Trumpington Street, Cambridge, CB2 1PZ, ENGLAND<br>


<br>Web: <a href="http://mi.eng.cam.ac.uk/%7Edre25" target="_blank">http://mi.eng.cam.ac.uk/~dre25</a><br><br clear="all"><br>