hi micheal,
not really sure what you mean by "the greyscale images cannot be
changed in the process ( so i suppose i can not use "transparency"
functions ...) "
without fully knowing your situation, i'd suggest is flattening both
images, then do an Edit->Copy on one image. go over to the the
other image and Add a New Layer. select this layer, and
Edit->Paste. now you have two layers with each image. raise
or lower the layers to get the one you want on top. now select
the top layer (image) and do a Layers->Add Alpha Channel.
after that, use the "magic wand" selection tool and highlight the
outside of the top layer (image), then do an Edit->Cut. this will
cut out all of the top layer that you want to be invisible, so all that
is left is the region of the top layer (image) that you want seen and
the bottom layer (image) under it. you can also play with the
transparency levels of each layer if you want to barely see the
bottom layer (image) too.
if this does not help then i don't understand your problem,
mail me again and i can help you more...
Michael Yuan wrote:
> Hi folks,
>
> Please help me with this since I do not have time to read through the gimp
> mannual before my thesis deadline ... Thanks!
>
> I have two grey scale images (might be converted to B/W if have to) and
> all I need is to overlay one at the top the other and generate a combined
> image. The grey scales of the two images can not be changed in the process
> (so I suppose I can not use "transparency" functions ...)
>
> I think it must be trival for gimp but I just do not know how. If I can
> not find a solution, I will copy one on a real transparency and overlay on
> the other and make a xerox copy and then scan it ... :(
>
> Any input is appreciated!
>
> good weekend
> Michael
>
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