Align_image_stack doesn't like greyscale input

[Tduell]

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