Extracting alpha channel from grey scale PNG

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ckv
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Extracting alpha channel from grey scale PNG

Post 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?
XnView Tweak UI - Tool to customize your XnView beyond the regular XnView options.
UI-less Settings - Documentation of all the hidden settings in XnView.
XFAM - Tool to create and customize XnView file associations.
User avatar
ckv
Posts: 786
Joined: Wed Feb 02, 2005 2:30 pm
Location: Glow
Contact:

Re: Extracting alpha channel from grey scale PNG

Post 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.
XnView Tweak UI - Tool to customize your XnView beyond the regular XnView options.
UI-less Settings - Documentation of all the hidden settings in XnView.
XFAM - Tool to create and customize XnView file associations.
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