Removing Moiré Effects
Digital cameras sometimes produce fine interference patterns known as moiré effects, like the one shown in the image detail in Figure 7-58. These patterns can be removed from digital images using the following method:
Create a new, combined interim layer, (as described in Figure 7-49) or a copy of the background layer if no other layers are present.
Figure 7-58. Image (a cut out) with a strong moiré effect
Use the Filter ▸ Noise ▸ Dust & Scratches command with a radius setting appropriate to the image resolution (here, between 3 and 6 pixels). The preview image (Figure 7-59) appears very blurred, but this is not a problem.