Lesson 2: Eliminate Moire

[DeadeyeRich]

Moire (pronounced more-ray)

You've seen it. You've scanned it. You've probably shouted a four letter word at it. It's moire. A checkerboard, herring bone or flower pattern that magically appears (actually it's physics) when you've scanned printed material. DVD labels will do it as well as covers.
Even digital cameras will do it. It is produced when the photoelements on a scanner doesn't quite align with the dots of your printed material or the texture or weave of a persons clothes with a cameras photoelements on its chip.

The four best way to eleminate or reduce it are:
1. Use your scanners descreening filter.
2. Scan with a higher resolution.
3. Slightly rotate the DVD or cover.
4. Elevate the object being scanned with a piece of glass.

One or a combination of the above methods should take care of a moire pattern. The only other thing you can do is use Gaussian Blur or the Median filters. I've used both of these methods too. Then add noise to take out the flat look.

BTW if your'e using your camera and see moire, take a couple of steps forward or backward.
_________________
If you can remember the sixties........you weren't there.

[tziamanik]

Another method that i usally do is to scan the photo at 304dpi natural size and use the photoshop filters blur more and despeckle. I have learned from my newspaper that I have worked.