If a scene contains areas with repetitive detail which exceeds the resolution of the camera, a wavy moiré pattern can appear, as shown in crop A. There is no moiré in crop B of an image of the same scene taken with a camera with a higher resolution. Anti-alias filters reduce or eliminate moiré but also reduce image sharpness.
|A. Example of moiré waves.||B. No moiré in this crop taken with a higher resolution camera.|
Sometimes, moiré can cause the camera's internal image processing to generate "maze" artifacts.
|Example of maze artifacts|
|This article is written by Vincent Bockaert,|
author of The 123 of digital imaging Interactive Learning Suite
Click here to visit 123di.com