Xante Colour ScreenWriter, Руководство пользователя

Страница: 414 / 446

G-12 Glossary bb __________________________________________
Landscape Orientation
A page format that is larger horizontally than it is vertically. The
term comes from painting when artists paint “landscapes” across the
wide dimension of the canvas. See also
Portrait Orientation .
Levels of Gray
The number of shades (tonal changes) of gray in a halftone image.
The number depends on the line screen and printing resolution used.
The higher the number, the smoother the image looks during the
transition of dot sizes. See also
Gray Scale and Line Screen .
Line Screen
The screen frequency or the number of rows of halftone dots in an inch.
The line screen and printing resolution determine the levels of gray
produced in an image. The line screen is inversely proportional to the
levels of gray produced. If the resolution is held constant, increasing the
line screen decreases the levels of gray possible in an image.
Linearization
Calibration of equipment to a linear standard so that the output value
(of color or gray tone) equals (matches) the input value.
Margin
Imprinted space around the edge of the page.
Midtone Dot
Commonly taken as the area between the highlight and shadow area
in a halftone image.
Mirror Image
An image which is flipped horizontally, reversing the position of its
parts.
Mirror Print
An image which is rotated horizontally 180˚. This produces a mirror
image of the original. Some XANTÉ printers feature a mirror print
option that allows you to create a mirror image without having to
alter the file settings to do so.