Question Home

Position:Home>Visual Arts> How to get rid of the "moire" effect in digital camera photos?


Question: How to get rid of the "moire" effect in digital camera photos!?
My first question was accidentally deleted so I need to ask again!. How do you get rid of the "moire" effect when taking photos with a digital camera!. I am using a Nikon D40 and took some pictures of an earthquake damaged building and it has considerable moire effect!. I have Adobe CS2 - what is the procedure to get rid of it in the existing picture and how do I set the camera to avoid when taking similar photos!? Www@QuestionHome@Com


Best Answer - Chosen by Asker:
In CS2:

- Duplicate the background layer;
- On this duplicate layer apply the High-pass filter at radius (3!.8)
- Apply a Gaussian blur to this at radius (0!.9)
- Invert the layer;
- Set blending to Linear Light;
- Set opacity at 50%;
- Mask to show only where you want to take out the Moire!.

Moire is caused by distance/focus/aperture combinations!. In real terms it has to do with the limits of what your sensor can resolve!. There's a ton of technical stuff here:

http://en!.wikipedia!.org/wiki/Moir%C3%A9_!.!.!.

Keep checking your LCD or move back a bit and/or select a smaller/larger aperture to get rid of it if you see it!. Www@QuestionHome@Com

You only get a 'moire' effect when you copy an image from a printed page!. The original dots of the image do note line up with the dots on your screen and then you get a moire effect!.

Do you mean 'artifacts'!? Coloured dots in the darker area of your image!? These are caused when you use a very high ISO setting on your camera!. These can also be caused in digital images when you repeatedly save the same image as JPEG's!.
Nick
Www@QuestionHome@Com