1. screen soft proofing technology printing copy
management technology
Screen soft proofing, in the
form of simulation on the screen display printing output effect. It is divided
into content proofing and color proofing. two different species. Color proofing
is combined with the color seen on the screen, testing the color that printing
paper will produce. Content proofing, ensure that there must be content on the
layout, at the same time in a reasonable position. Screen color is composed of
three primary colors RGB, but paper color is obtained by four colors CMYK
overprint, so it is not easy to achieve consistency between the two. Therefore,
the skillful use of color management technology to match color, this is very
important in book printing, so that the paper simulation is correct. Precisely
correct screen, color management, which constitutes a screen soft proofing
technology is very important content. screen correction, adjust the
characteristics of the display to achieve the required state. Screen soft
proofing in the use of special software, to the equipment feature file, analog
image color, presented on the display. By using some color mutual simulation
transformation, the output device feature file is adjusted to find the
corresponding relationship between the color image data and the output device
through the intermediate color space Lab, which is not related to the device,
and the color effect of the output device is correctly restored through the
display.
2. Application of Color Image Color Separation Technology
in Printing Replication
The digital image color
separation, the transformation of the RGB image trichromatic data into CMYK
four-color data, this conversion time is achieved through the image color mode.
As a concrete example, the Photoshop is analyzed below. In processing color transformation
in book printing, it includes two kinds of methods: one is
transformation as configuration file command under select edit menu. One is to
transform the RGB mode into the CMYK mode under the mode command image menu; in
the first way, the user takes the output device feature file as the reference
to ensure that the image color separation is correct, or uses the custom way to
control the different parameters in the image color separation processing, in
order to obtain a very good color separation effect, in the use of color
conversion mode, to ensure that after color separation, the printing effect is
roughly consistent with the display effect. By using the second method, the
output device feature parameter is used in the image color separation
processing, which originates from the software setting CMYK space.