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A moiré pattern is an interference pattern created when two grids are overlaid at an angle, or when they have slightly different mesh sizes. Interference of two circular waves - Wavelength (decreasing bottom to top) and Wave centers distance (increasing to the right). ...
 A moiré pattern, formed by two sets of parallel lines, one set inclined at an angle of 5° to the other The drawing on the right shows a moiré pattern. The lines could represent fibres in moiré silk, or lines drawn on paper or on a computer screen. The human visual system creates an imaginary pattern of roughly horizontal dark and light bands, the moiré pattern, that appears to be superimposed on the lines. More complex moiré patterns are created if the lines are curved or not exactly parallel. Illustration of moiré effect. ...
The term originates from moire (or moiré in its French form), a type of textile, traditionally of silk but now also of cotton or synthetic fibre, with a rippled or 'watered' appearance. Textile is also a kind of ReStructured Text. ...
Silk (< OE sioloc probably < L. SERICVS / Gr. ...
Cotton is a soft fiber that grows around the seeds of the cotton plant, a shrub native to the tropical and subtropical regions of both the Old World and the New World. ...
Moiré patterns are often an undesired artifact of images produced by various digital imaging and computer graphics techniques, e.g. when scanning a halftone picture or ray tracing a checkered plane. This cause of moire is a special case of aliasing, due to undersampling a fine regular pattern. This page is about artifacts in science. ...
A digital image is a representation of a two-dimensional image as a finite set of digital values, called picture elements or pixels. ...
Digital imaging or digital image acquisition is the creation of digital images, typically from a physical object. ...
Computer graphics (CG) is the field of visual computing, where one utilizes computers both to generate visual images synthetically and to integrate or alter visual and spatial information sampled from the real world. ...
In computing, a scanner is a device which analyzes a physical image (such as a photograph, printed text, or handwriting) or an object (such as ornament) and converts it to a digital image. ...
Halftoning is a method of printing shades using a single color ink. ...
A ray traced scene. ...
This article is about aliasing as it applies to signal processing, including computer graphics. ...
The Nyquist-Shannon sampling theorem is the fundamental theorem in the field of information theory, in particular telecommunications. ...
In manufacturing industries, these patterns are used for studying microscopic strain in materials: by deforming a grid with respect to a reference grid and measuring the moiré pattern, the stress levels and patterns can be deduced. This technique is attractive because the scale of the moiré pattern is much larger than the deflection that causes it, making measurement easier. Manufacturing is the transformation of raw materials into finished goods for sale, or intermediate processes involving the production or finishing of semi-manufactures. ...
Strain, in any branch of science dealing with materials and their behaviour, is the geometrical expression of deformation caused by the action of stress on a physical body. ...
Etymology
The history of the word moire is complicated. The earliest agreed origin is the Arabic-Persian mukhayyar, a cloth made from the wool of the Angora goat, from khayyana, 'he chose' (hence 'a choice, or excellent, cloth'). It has also been suggested that the Arabic word was formed from the Latin marmoreus, meaning 'like marble'. By 1570 the word had found its way into English as mohair. This was then adopted into French as mouaire, and by 1660 (in the writings of Samuel Pepys) it had been adopted back into English as moire or moyre. Meanwhile the French mouaire had mutated into a verb, moirer, meaning 'to produce a watered textile by weaving or pressing', which by 1823 had spawned the adjective moiré. Moire and moiré are now used interchangeably in English. The angora goat is a goat from the Angora region in Asia Minor, near present-day Ankara. ...
Events January 23 - The assassination of regent James Stewart, Earl of Moray throws Scotland into civil war February 25 - Pope Pius V excommunicates Queen Elizabeth I of England. ...
Mohair is a silk-like fabric made from the hair of the Angora goat. ...
Events Expulsion of the Carib indigenous people from Martinique by French occupying forces. ...
Samuel Pepys Samuel Pepys (23 February 1633 - 26 May 1703) was a leading 17th century English civil servant, latterly famous for his diary. ...
1823 was a common year starting on Wednesday (see link for calendar). ...
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