Hmmm, I&#39;m not too sure of the need for this, given that ndimage already has a Sobel and Prewitt filter which are implemented via separable 1D convolutions (and will thus be faster than a 2D convolution). I can see this being useful if we want to remove the dependency on ndimage at some point, once we have our own fast convolution routine (or just have a convolution that is faster that the one in ndimage). However in that case, I think these two filters should still be implemented as separable 1D filters.<br>
<br><div class="gmail_quote">2011/4/19 Stéfan van der Walt <span dir="ltr">&lt;<a href="mailto:stefan@sun.ac.za">stefan@sun.ac.za</a>&gt;</span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
Hi all,<br>
<br>
Pieter Holtzhausen made a pull request to bring over the Sobel /<br>
Prewitt edge detection filters from CellProfiler.  I reviewed and<br>
merged his code, alongside with the connected components changes<br>
suggested last week.  You can find the changesets here:<br>
<br>
<a href="https://github.com/stefanv/scikits.image/commit/cef53c172dd3e15dc98ddbf97a908c0f67a7283b" target="_blank">https://github.com/stefanv/scikits.image/commit/cef53c172dd3e15dc98ddbf97a908c0f67a7283b</a><br>
<br>
Please review and comment--you input is highly valued!<br>
<br>
Regards<br>
<font color="#888888">Stéfan<br>
</font></blockquote></div><br>