[Image-SIG] flatten 1 bit images

[Joancarles Casasín]

Hi you all,

Maybe it's the silliest question ever to the list but I really  
couldn't find out trying and trying with this.
(not an expert as you see)

I'd like to flatten four 1 bit images in a resulting one, having  
white as transparent an all black pixels in the separated images  
visible. I can't do it directly.
Do I need to make any conversion before? is this possible?

Many thanks for your help,


Joancarles
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www.casasin.com
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