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Extracting alpha channel from grey scale PNG

Posted: Thu Jun 12, 2014 6:52 pm
by ckv
I'm trying to extract the alpha channel from a grey scale PNG file without any luck. When I use the extract alpha channel option on XnView MP nothing seems to happen and on XnView the option to extract the alpha channel is grayed out. Converting to 32-bits first doesn't work either, on XnView MP I just get a white image with white mask. What gives?

Re: Extracting alpha channel from grey scale PNG

Posted: Thu Jun 12, 2014 10:00 pm
by XnTriq

Re: Extracting alpha channel from grey scale PNG

Posted: Fri Jun 13, 2014 8:14 pm
by ckv
XnTriq wrote:Hi ckv (-:

This is a limitation known from XnView Classic.

...
Thanks, helpful as always :)

I finally got the mask from my image by using IrfanView which seem to handle these files a little better than XnView.