I have a project I'm working on where I'm taking photos of a bunch of cards / posters that are all in grayscale and have to get only the black portions from each of these photos.
I know I could use
Select > Color Range to do this to each image separately, but I was hoping there was a way to simply create some kind of mask that could be placed on top of any of these images that would only show the black portions of that image (Also, again, since these images are from photos, it would need some form of tolerance too, not just purely black, but black and dark grays).
Any ideas on how / if this can be done??