moire


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moire

a fabric, usually silk, having a watered effect

Moiré

 

(1) A dense silk or semisilk patterned fabric of various hues; it is iridescent in the light. Moiré is used to make dresses, trimmings, and ribbons.

(2) Paper with a pattern stamped on the surface.

(3) Alternating dark and light stripes in an impression that result from the incorrect preparation of a halftone plate.

moiré

[mȯ′rā]
(communications)
In television, the spurious pattern in the reproduced picture resulting from interference beats between two sets of periodic structures in the image.
(graphic arts)
Undesirable patterns that occur when a halftone is made from a previously printed halftone or steel engraving; they are caused by the conflict between the dot arrangement produced by the halftone screen and the dots or lines of the original halftone or engraving; careful rotation of the halftone screen by the photographer or engraver may minimize moiré.
(textiles)
A fabric finish in which the warp has yarn of harder twist than the filling, with a surface pattern resembling water ripples that is produced by engraved rollers, heat, pressure, steam, and chemicals.

moire

Pronounced "mor-ray" and spelled "moiré." In computer graphics, a visible distortion. It results from a variety of conditions; for example, when scanning halftones at a resolution not consistent with the eventual printed resolution or when superimposing curved patterns on one another. Internal monitor misalignment can also be a cause. The term comes from the French "moirer" (to water) and is used to express a rippled, water-like look, which is often a desired artistic effect.


A Common Moiré Pattern
Reducing images with checkered or herringbone patterns often creates the Moiré look as in the above example. At the top, the pillow reduces correctly but the checkered fabric in the chair creates a swirling Moiré effect.







Halftone Examples
When printing halftones, rosettes are formed if the screens are registered properly. The magnified view at the bottom shows the misaligned rosettes, which actually create the Moiré pattern. (Images courtesy of Adobe Systems, Inc.)
References in periodicals archive ?
The topographic profiles generated by the Moire technique can be directly related to physical and mechanical attributes of fruits (Rohlfing et al.
The other new Kinegram variation for use in a banknote window that Tompkin presented was a Moire pattern version.
Twenty-five years ago, the Dorothy Perkins' 1986 Christmas range included this metallic moire suit which came in gold, sizes 10 to 14, made of "30% metallic and 70% viscose.
The six windfarms are Beinn Ghrideag Wind Farm , Sealladh na Beinne Moire, Urras Oighreachd Ghabhsainn , Horshader Community Development, Tolsta Community Development, and Barra and Vatersay Community Ltd.
Para detectar los cambios en la armonia facial se estudian dos tecnicas: proyeccion lineal y patrones Moire.
Part II explains fundamental principles and techniques for metrology, in chapters on areas including propagation of light, interferometry, holography, speckle methods, and Moire metrology.
This is a wonderful book with many attachments that enable actual involvement in optical illusions: flip books for simulating movement; a pop-up stereoscope: a moire screen and many others.
A real-time projection moire warpage measurement system was used to measure the surface topology of assembly samples at different temperatures.
Staccato and Staccato CX screening enable high-fidelity, consistent presswork that exhibits fine detail without halftone rosettes, moire, grey-level limitations, or abrupt jumps in tone, according to Kodak.
Isabella, 14, a pupil of Upton Convent School, is wearing an ivory silk moire dress with panels of embroidered pearls.
Atelier, including toile patterns, damask, moire and linen in neutrals and black and white.
To the south, pierced louvres and fritted glass are overlaid to create a moire pattern that admits a sparkle of natural light; to the north, diamond panes are silk-screened with foliage to evoke a forest, though nature should soon provide the real thing.