Xanté 8300 Mode D'Emploi

Introduction

To take full advantage of your printer’s high resolution and make
your images look their best, it is important that you understand levels
of gray, line screens, scanner resolutions, scanned image formats,
and their uses within specific applications.

This chapter explains these concepts and describes how to use them
with XANTÉ’s Enhanced Screening Technology, NEIT, XANTÉ’s
Halftone Calibration Technology, to achieve the best quality in
output.

Levels of Gray

A laser printer’s resolution is measured in dots per inch (dpi). The
standard resolution on your printer is 600 x 600 dpi, which you may
have upgraded to 1200 x 1200 dpi.

The human eye can detect approximately 256 shades of gray. The
more levels of gray (number of shades) produced in a halftone
image, the smoother the image appears.

The following simple formula can help you determine the shades of
gray used to produce an image:

  dots per inch

lines per inch

For example, if you print at 600 x 600 dpi with a 60 line screen, the
image produced has 101 levels of gray (600/60 = 10; 10 x 10 + 1 =
101). For more levels of gray at 600 dpi, the line screen or lines per
inch (lpi) has to be reduced. 

The higher the lines per inch, the tighter the screen on the image will
be. To produce higher levels of gray without using a lower line
screen, you must print at a higher dpi.

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