halftone screen
(1) a sheet of glass or film that is used as an intermediate between continuous tone copy and photographic material; also refer to contact screen, crossline screen, and levy screen; ...
Halftone screen
A pattern of dots of different sizes used to simulate a continuous tone photograph, either in colour or black and white.
Halo
A light line around object edges in a image, produced by the USM (sharpening) technique.
The number of lines per inch in a halftone screen.
Front-curtain sync.
In graphic arts and prepress, the usual technology for printing full-color images involves the superimposition of halftone screens. These are regular rectangular dot patterns-often four of them, printed in cyan, yellow, magenta, and black.
Simulates the effect of using an enlarged halftone screen on each channel of the image. For each channel, the filter divides the image into rectangles and replaces each rectangle with a circle.
Moire
A visible pattern that occurs when one or more halftone screens are misregistered in a color image.
Morphing
A special effect used in motion pictures and video to produce a smooth transformation from one object or shape to another.
Contact Screen: a photographically-made halftone screen having a dot structure of a graded density, used in a vacuum contact situation with a high contrast (litho) frame.
Contiguous: Placed adjacently; one after another.
The net effect is to simulate sending 300 pixels per inch to a 150 lpi halftone screen. FIGURE 5a: The image from the 16-megapixel camera. FIGURE 5b: The resed-up image from the 6-megapixel camera.
Frequency - The number of lines per inch in a halftone screen.
Gamma - A way of representing the contrast of an image, shown as the slope of a curve showing tones from white to black.
The graphic was photographed through a halftone screen to break it into various size dots. You can look at an old book with a magnifying glass and see the dots. DPI means Dots Per Inch.
Although all the holes in the halftone screen were the same size, the size of the resulting halftone dot on the film was a function of exposure and development.
An interference pattern which may occur when scanning images with a halftone screen. An example of aliasing error.
monochrome ...
Short for lines per inch; refers to the frequency of horizontal and vertical lines on a halftone screen.
luminance: ...
Moiré patterns are difficult to predict because they result from a complex combination of parameters: the size of the image, resolution of the image, resolution of the output device, halftone screen angle, etc.
The scribed lines on the glass plate break the image up into dots called a "halftone screen". The negative is then used to create a printing plate used on the press. Today this process is usually done digitally, but it has the same result.
Halftone-Reproduction by printing processes, such as lithography of a photograph in which the gradation of tone is reproduced by a pattern of dots and intermittent white spaces, caused by interposing a halftone screen between the lens and the film.
As with fine halftone screens, the smaller the dots, the sharper the image.
 See also: Halftone, Image, Print, Light, Camera
  
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