I have an image of a person's signature that was scanned in on a B/W scanner. When viewing this image in Photoshop the signature is not as crisp as I would like it to be. Are there any simple adjustments I can make so that the black/grey part of the image become more black and the white background stays white? Basically I want to enhance the signature so it is not as grainy when printed.
The only way I know how to do this is to zoom in to 1600% and adjust it a few pixels at a time but this will take way too long.
Thanks for any advice you can give.