Hello All,
When input images are greyscale, Align_image_stack quits with a message,
along the lines that input images have different number of bands to output
images.
I think I have a way around this limitation for my current project, but it
seems to me that the ability to handle the whole range of typical image
types would be a good capability, and probably not (I'm guessing) a
difficult thing to do.
When I get some time I will have a look at the code. Does anyone have any
ideas on this?

Cheers,
Terry