This article is about the graphic technique. For the musical interval, see Semitone. For the musical note, see Half note.
Left: Halftone dots. Right: Example of how the human eye would see the dots from a sufficient distance.
Halftone is the reprographic technique that simulates continuous-tone imagery through the use of dots, varying either in size or in spacing, thus generating a gradient-like effect.[1] "Halftone" can also be used to refer specifically to the image that is produced by this process.[1]
Where continuous-tone imagery contains an infinite range of colors or greys, the halftone process reduces visual reproductions to an image that is printed with only one color of ink, in dots of differing size (pulse-width modulation) or spacing (frequency modulation) or both. This reproduction relies on a basic optical illusion: when the halftone dots are small, the human eye interprets the patterned areas as if they were smooth tones. At a microscopic level, developed black-and-white photographic film also consists of only two colors, and not an infinite range of continuous tones. For details, see film grain.
Just as color photography evolved with the addition of filters and film layers, color printing is made possible by repeating the halftone process for each subtractive color – most commonly using what is called the "CMYK color model".[2] The semi-opaque property of ink allows halftone dots of different colors to create another optical effect: full-color imagery.[1] Since the location of the individual dots cannot be determined exactly, the dots partially overlap leading to a combination of additive and subtractive color mixing called autotypical color mixing.
Halftone is the reprographic technique that simulates continuous-tone imagery through the use of dots, varying either in size or in spacing, thus generating...
In a facsimile system the halftone characteristic is either: the relationship between the density of the recorded copy and the density of the original...
needed] Halftoning allows for a continuous variability of each color, which enables continuous color mixing of the primaries. Without halftoning, each primary...
into regions of text, regions of halftone images, and regions of other data. Regions that are neither text nor halftones are typically compressed using...
causes printed material to look darker than intended. It is caused by halftone dots growing in area between the original printing film and the final printed...
analogous to the halftone technique used in printing. For this reason, the term dithering is sometimes used interchangeably with the term halftoning, particularly...
Duplex) is a halftone reproduction of an image using the superimposition of one contrasting color halftone over another color halftone. This is most...
angle each color takes up). Another physical model mimics pointillism or halftone printing, where the spatial acuity of the human eye is not sufficient to...
in 1855 to print images in a wide variety of tones without the need for halftone screens. The majority of collotypes were produced between the 1870s and...
for printing technologies that perform color mixing through dithering (halftone) rather than through overprinting (virtually all home/office inkjet and...
descriptions of dithering. Halftone dithering performs a form of clustered dithering, creating a look similar to halftone patterns, using a specially...
indicated by contour lines. Before the development of photography and of halftones, line art was the standard format for illustrations to be used in print...
(known in English as Art Forms in Nature) is a book of lithographic and halftone prints by German biologist Ernst Haeckel. Originally published in sets...
historic 1905 book Yogasopana Purvacatuska; he represented the pose using a halftone plate, giving for the first time a realistic impression of the body of...
called a monochromator. Duotone, the use of two ink colors in printing Halftone, the use of black and white in a pattern that is perceived as shades of...
inventor of "the" halftone process, but this is incorrect and Ives never made such a claim for himself. There was not one halftone process, but a considerable...
television scanning patterns, and has been widely used to describe similar halftone printing and storage techniques. For convenience, pixels are normally arranged...
1919, Femmes au bain, oil on canvas, 61.1 X 46 cm, private collection Halftone Klangfarbenmelodie Micromontage, similar technique in music Stipple engraving...
ISO/DIS 12647-1: Graphic Technology – Process control for the production of halftone color separations, proof and production prints – part 1: Parameters and...
eclipsed; and the nose, bright and obvious, thrusting into the riddle of halftones, serves to focus the viewer's attention upon, and to dramatize, the division...
You can view the halftoning, which enables printed images, by examining a printed picture under magnification. Traditionally, halftone screens were generated...
inch (LPI) is a measurement of printing resolution. A line consists of halftones that is built up by physical ink dots made by the printer device to create...
The Dultgen halftone intaglio process is a photoengraving technique invented by Arthur Dultgen and is widely used today in commercial colour work. Two...
both sides in order to create a surface more suitable for high-resolution halftone screens. (Uncoated papers are rarely suitable for screens above 150 lpi...
single tone, and not as discrete halftones, such as one single color for monochromatic prints, or a combination of halftones for color prints. The most common...
The company launched the world's first halftone optical film scanner in 1984, the world's first desktop halftone scanner in 1986, and the world's first...
Global Information