Color Management of Prepress Color Equipment (2)

Implement color management on the monitor

Color displays are the easiest to characterize and generate profile files. The display and the graphics card communicate with each other, and the operating system is used to represent the color image. Users can manually adjust the display and graphics card, but changes made to the brightness, contrast, and color balance must be able to be loaded into the operating system.

Future display systems will use simple sensors to detect brightness, color balance, or "white field." The display should be capable of real-time communication with the color rendering state at that time, adjusting the offset and error occurring at any time. The display and graphics card vendors should enable the operating system to intervene in the imaging system to simplify the upgrade of the display profile and implement correct color management.

The liquid crystal display is followed by a dye-based filter. The filter is stable in nature, has a long life, and the color rendering performance of the display screen is also quite stable. With the advent of liquid crystal display LCDs for desktop publishing, the importance of graphics cards and operating systems has become increasingly prominent. Any adjustments made to the monitor should be read by the operating system. Other types of display technologies such as FEDs, digital mirroring devices, etc. must also reflect feedback to the operating system.

Points to note when designing a monitor:

Display device features such as brightness and contrast must be recognized and processed by the operating system for proper color management.

Adjustments to the graphics card, such as gamma adjustments, must also be recognized by the operating system.

Still, the color rendering characteristics of the display and graphics card should be set by the operating system.

Scanners, digital cameras and color management

Input devices such as scanners and digital cameras involve additional problems. The scanner usually comes with software to control the imaging. But any adjustment should be able to enter the operating system, and then enter the color management software. The scanner's status settings should also be entered into the operating system and used by color management software.

Digital cameras use external light sources, either direct sunlight, cloudy daylight, home white lighting, or office fluorescent lights. Natural light may have many variations in spectral distribution and intensity. Various problems may affect the quality of digital pictures. However, if you can know the approximate brightness of the environment, then with CMS, this process will be much easier. Perhaps each digital camera should be equipped with a simple but effective RGB sensor on the body to detect the ambient brightness.

Points to note when designing a digital camera or scanner:

Two-way communication between the scanner and the operating system must color management system is provided to receive the data from the scanner or a digital camera, such as brightness and contrast.

Both the digital camera and the scanner should be controlled by the operating system. Any settings that may affect the image quality should be transmitted to the color peripheral through the operating system.

It is more convenient to set up peripherals through a color management system. If the user knows the profile file of the scanner he wants to use, he can immediately send the data information to the scanner through the operating system.

(to be continued)