On 2004-09-02 13:23:02 -0400, cpliu said:
I wonder if Photoshop can get rid of small dots from scanning artifacts. I have tried Dust & Scratches but it also damages the other part of the image. What I really like to do is:
Identify 1 to 4 pixel dots.
If there is at least a few pixel white space between this dot and any other image area, delete it.
Is it possible for do that in Photoshop?
Yeah, but how you do it sometimes depends upon how much $$ you have.
Please elaborate on the "dots"; send a link to a pic if you can.
If the dots are multicolored, random, and cover large areas of the image, they’re probably noise. If the dots are actually noise, there are lots of good noise-removal actions (both free and $$) that can remove them. These actions are much more sophisticated than what’s immediately available (like Dust & Scratches), and will remove noise but retain image detail. Note that most of these noise-removal actions are really for badly-exposed digital camera images, however. If you are getting noisy images from your scanner, you need to solve the problem with the scanner.
If the dots are in a regular pattern, they’re probably due to the prinitng process. Does your scanner software have a "descreening" feature? This is kinda critical if you’re scanning from books and the usual maagzines. If you’re going to be scanning from the same kind of material, you might want to switch your application.
If the dots are random and just a few here and there, then you can easily remove them with the healing brush, which is like the clone tool. If you find that you are killing the image detail when you are corercting these dots, then you need to learn how to put noise back _in_ to the image to make it appear realistic and not plastic.
The more info you provide, the more we’ll be able to help —
No sig, no neuroses
