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.