extract alpha

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overFlo
Posts: 1
Joined: Fri Jan 12, 2007 4:48 pm

extract alpha

Post by overFlo » Fri Jan 12, 2007 6:06 pm

hi there! thanks for supplying us all with this great tool for free.
one question:
is there a way to extract the alpha channel from a tiff file and save it as a jpeg? i know how to look at the alpha (m), but i have no idea how to save it.
i tried with nconvert but there seems to be no switching channels there as well. or let me put it this way: can i map the alpha channel to rgb and save it as a jpeg? or just to one of the color channels?

cheers and thanks,
flo

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xnview
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Posts: 31938
Joined: Mon Oct 13, 2003 7:31 am
Location: France
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Re: extract alpha

Post by xnview » Sat Jan 13, 2007 7:30 am

overFlo wrote:hi there! thanks for supplying us all with this great tool for free.
one question:
is there a way to extract the alpha channel from a tiff file and save it as a jpeg? i know how to look at the alpha (m), but i have no idea how to save it.
i tried with nconvert but there seems to be no switching channels there as well. or let me put it this way: can i map the alpha channel to rgb and save it as a jpeg? or just to one of the color channels?

cheers and thanks,
flo
Not with 1.82, but i'll add it in next release...
Pierre.

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