Halftone


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Halftone

An engraving used to print an illustration, such as in a book or magazine. This word is most common in publishing.
References in periodicals archive ?
For halftone color reproduction images, the change in dot diameter is the critical factor for the print image transfer, and these changes usually lead to tonal and color shifts.
To compensate for these issues, special techniques have been proposed for halftone images, such as covering code [6, 12].
Many formulas are available to define the angular relationship between the grids of halftone dots that will be produced on the screen.
En este metodo, los valores de pixeles se comparan con los valores de la matriz de pantalla; si el valor del pixel es mayor que el valor de matriz, se asigna 1 (blanco) a la imagen halftone y en caso contrario, asigna el valor 0 (negro) a la imagen halftone, cuyo proceso esta dado por (1).
As Sharma (Sharma, 2003) stated that halftone originally established as a photographic method.
The Yule-Nielsen equation describes quite well the tone and color reproduction in many halftone systems (Ruckdeschel & Hauser, 1978).The values [R.sub.i] and [R.sub.p] are reflectance values of the ink and the substrate, and the factor "n" is the empiric constant that has been selected in order to enable the best match between values of R and [F.sub.i].
The original halftone process--variously referred to as block process, halftone relief, halftone engraving, or halftone letterpress--begins with a screened negative made from an original photograph.
The key to making a Glossmark is "controlling the halftone structure--how the tiny ink dots are distributed on the page," says Liu.
Use some kind of filter, like a halftone. On some photocopiers there's a photo setting or "photoscreen!" Otherwise you will get a jumble of high-contrast slop.
It also has 36-bit image capturing processing capabilities for scanning poor quality images, such as a patented two-dimensional adaptive threshold, sharpening, softening, blurring, and the manufacturer's ADL+ error diffusion halftone copying algorithm.
To facilitate optimal learning, this edition features more than 200 illustrations, including labeled drawings and halftone photographs.
One is the halftone image, a two-dimensional (2-D) pattern of larger and smaller dots used in reproducing pictures.