screen angles
the coordinated placement of screens to avoid moiré patterns.
Screen angle
The angle at which the halftone screens are placed in relation to one another.
Screen frequency
The number of lines or dots per inch in a halftone screen.
Moire: In color process printing, the pattern which exists because of one screen angle overprinting another or several other screen angles.
Part of the prepress art consists of selecting screen angles and halftone frequencies which minimize moiré. The visibility of moiré is not entirely predictable.
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.
 See also: Scale, Contrast, Application, Digital, Printing
  
|
RSS
