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Native Moiré on computer screens.

As you might know, the computer screen is composed of a grid of pixels. Pixels are theoretically squares and they make up the image you see on the screen.
Thus any digitized image you can open up in a computer is pixel-based, since it is the only representation method there is.

Fig. 1 The pixel grid

Moiré, according to Eric Kindel, in the 52nd issue of Eye Magazine, are 'made by superimposing regular patterns or screens to create second-order figures.'

Fig. 2a Fig. 2b

In the print world, halftone screens, when aligned at certain angles against each other, create moiré effects, which is usually considered undesirable as they tamper with the image to be printed. This is especially true with photographic images. Yet designers have used moiré on purpose to create a certain look, usually on graphical symbols or regular shades of colour.

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© Edmund Fung | edmund@lcdsarenotflickerfree.com