Minolta PAGEPRO EX, Руководство пользователя

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Optimizing files for processing and printing
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Optimizing files for processing and printing
The following sections provide tips on how to create image files that
produce the highest possible print quality while minimizing the pro-
cessing time and disk space they require.
Resolution of raster images
While a 72 ppi raster image appears sharp on a monitor, the same
image would likely appear pixelated when printed to the printer.
Color print devices are capable of much greater detail than monitors,
and require correspondingly higher resolution image files. However,
high-resolution files can be large, and therefore cumbersome to
transmit over a network, process for printing, store on disk, and edit.
Beyond a certain threshold, a higher image resolution greatly
increases file size while having a minimal effect on output quality.
The optimal image resolution depends on the resolution of the final
print device. Aim for the resolution that optimizes both file size and
output quality.
The resolution of a raster, along with its bit depth and physical
dimensions, determine its file size. The following table shows the file
sizes of color raster images at different dimensions and resolutions.
Image size
File size at
100 ppi 150 ppi 200 ppi 400 ppi
RGB/CMYK RGB/CMYK RGB/CMYK RGB/CMYK
3"
×
4" 0.4/0.5MB 0.8/1.0MB 1.4/1.8MB 5.5/7.3MB
5"
×
7" 1.0/1.3MB 2.3/3.0MB 4.0/5.3MB 16.0/21.4MB
8.5"
×
11" 2.7/3.6MB 6.0/8.0MB 10.7/14.3MB 42.8/57.1MB