Four questions and four answers to the most popula

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Prepress graphic color management knowledge four questions and four answers

what is color independent of equipment

the independence of color and device is an important part of realizing the image information exchange standard, which means that the image color data results obtained by one image processing device should be able to be restored on another processing device. To realize the independence of color and equipment, we must be able to objectively evaluate the transformation characteristics between the color and density of image and processing equipment

how to realize color management in color management system (CMS)

devices used to create colors include scanners, monitors, desktop printers, and printers, each of which can reproduce a limited range of colors. We call the color that a device can reproduce as a color table, and the color tables of many devices are recorded in a culture called "profile" that cannot play a role. The color management system obtains the color table of the device from this file. The color management system will convert the color table of a device into a device independent color mode CIELab color mode, and then carry out color mapping between devices, and embed the converted device independent color information into the color table of another device, so that the device color table can correspond. There are two ways to coordinate the chromatograms of different devices: one is to preserve the relationship between colors by transforming all colors into the chromatogram of the device; Another method is to map the colors outside the chromatography to the colors that can be produced by the equipment without preserving the relationship between colors

color management process, so manufacturers can only reduce the losses caused by faults by establishing a perfect after-sales service system

an ideal color management process is as follows: 1 Determine the color performance characteristics of the display: some color management systems preset the display color profiles provided by various manufacturers to form a comprehensive internal preset file profile library, which can be called when determining the color characteristics of the display. 2. Calibrate the display. Adjust the white dot and other display characteristics of the display to meet your output requirements in case of tubing rupture. For example, if it is output to the printing medium, the white dot of the display can be calibrated to the color temperature of the printing paper. 3. Determine the characteristics of the scanner or other input devices. If the color management system provides an it8 sample, it can be scanned or photographed. Then compare the obtained color value with the standard color value, and record all the difference information as the profile file of the scanner for scanning. 4. The color management system converts the scanning results into the color space of the display. 5. Determine the characteristics of color printing and output equipment. That is, select a color feature description file for the color printer, printing conditions and other output devices supported by the color management system. 6. The color management system uses the overview documents of the display and printing machine to change colors. Some systems allow "soft proofing" on the screen (that is, CMYK color on the screen)

why is the color management of the display particularly important

although the display is a computer output device, it is an important part for designers to adjust colors, match colors, observe the depth of images, and adjust levels; To reference the window. Although we all know that there is a gap between the color on the display and the printed color, the judgment of image level, depth, clarity and other aspects is based on the display of the display, because it is impossible for us to interpret the color data of each pixel. Secondly, the display is the visual center of the design. No matter what the color mode of the image is, it should be reflected on the display. The digital image of RGB color mode should be displayed on the display, and the digital image of CMYK color mode should also be displayed on the display after conversion. The images of these two color modes of the same file may have different colors on the display. (end)

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