Blurring color images with transparency

[McSodbrenner]

Hi,
referring to this post
viewtopic.php?t=24665
I've got the same problem (black halos) with "-selective-blur". "-blur" and "-adaptive-blur" are working fine indeed.

Version: ImageMagick 7.0.1-5 Q16 x64 2016-05-18

Greets,
Christoph

[snibgo]

Please show example images and the exact commands you used.

[McSodbrenner]

Sorry, just looked like an error but seems to be an unfavorable result of the selective blur algorithm on images with an alpha channel.
Sorry again,
Christoph