Monitor calibration and screen soft proofing
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1. Why do you want to calibrate your monitor?
A display is a window in which a person talks to a computer. However, after a period of time, the contrast, brightness, and color rendering of the display will be attenuated, resulting in inaccurate display color. Display color rendering is not allowed to cause great inconvenience to people's work, especially in industries that require high color accuracy (such as printing, advertising, design and other industries). If the color seen on the display is very different from the color of the printed color, the color work will not find the direction. Therefore, it is necessary to calibrate the display after a period of time.
In general, the better the display, the better the color rendering, the slower the attenuation, the better the calibration of the display is achieved; the worse the display, the worse the color rendering, the faster the attenuation, the calibration of the display will not be very good. effect. Quality determines the ability.
2. Display calibration
1) Required hardware
Spectrolino or Eye-One and other products.
2) Required software
ProfileMaker, Eye-One Match, etc.
3) Calibration of the display (take the combination of Spectrolino and ProfileMaker as an example)
(1) Install the ProfileMaker software and connect the hardware Spectrolino.
(2) Open ProfileMaker1/Select Monitor item, where you can calibrate the display and create the ICC of the display. In the Reference, select the type of display you want to correct: CRT (Cathode Ray Tube); LCD (Liquid Crystal Display). Select SpectroLino in the Sample. Then, follow the on-screen instructions and follow the steps.
(3) Follow the on-screen instructions
A. The software will prompt to calibrate the SpectroLino on a white point.
B. Ask if you need to make a correction for the display, and select "Yes" if you have not corrected it beforehand.
C. Then the color temperature expected to be corrected: 6500K; Gamma: 2.2 (PC), 1.8 (MAC); Brightness: 100%.
D. Next step: First adjust the contrast of the display to the maximum, and put the food on the display. Press Start and the software will automatically adjust until the two small triangles are aligned.
E. Next step: Decrease the brightness of the display to a minimum, press Start, then manually adjust and increase the brightness little by little until the two small triangles are aligned.
F. Next step: If the display can adjust the RGB tri-color value, or color temperature value, then press Start, the food will measure the current RGB value and color temperature value, then adjust the display RGB value, let the color temperature value to 6500K, and RGB three-color The small triangles are all centered, and a key point is to have a brightness value of 100 (ideal range is 80~120). Exceeding this range may result in undesirable results.
G. After the calibration is completed, you will be prompted whether to recalibrate and select "No".
H. Then ICIC measurement of the screen is started, and it needs to be saved after completion.
I. ICC can be generated by making the necessary settings. Default setting: Default (Also select Large, the amount of data is larger, the effect will be better), Measured white Point.
If it is a new display, you can choose either D65 or D50, but if RGB can't be adjusted, or the color temperature can't be high speed, you have to choose Measured White Point.
J. Click Start to generate the ICC of the display.
K. The software asks if this ICC is set to the system default ICC and select "Yes". The monitor's Monitor.icc is automatically copied to the following address: Winnt/System32/spool/drivers/color (PC) for system calls.
3. Screen soft proofing
Screen soft proofing should be done on the basis of screen calibration.
The parameter configuration is important when performing soft proofing on the screen. The integrity and accuracy of the parameters determine the soft proofing effect of the screen. Therefore, it is recommended to generate a profile ICC for input devices (such as digital cameras, scanners) and output devices (such as printers) related to their own production before performing soft proofing of the screen.
1) Color mode conversion and soft proofing in Photoshop
(1) Basic settings
Open Photoshop software and make the following settings, this setting shows the true color of the image to the greatest extent.
Open a picture in this setting, the color displayed at this time is closer to the real thing.
(2) Color mode conversion
Convert RGB to CMYK.
A. Open an RGB image and assign a color source parameter to an input device (such as a scanner, digital camera, etc.) for this RGB image. If you do not have your own device parameters, select Adobe RGB (1998).
B. Point out the way to the RGB map to CMYK. If you have your own output device, please select the parameters of the output device (such as printer, printer, etc.), if not, select US.sheetfed Coated v2. or US.Sheetfed Unoated v2.
Select "Mode" / "CMYK" to get an ideal RGB conversion to CMYK map.
(3) Screen soft proofing in Photoshop
A. Copy the Monitor.icc after the monitor is calibrated and the reference.icc of the output device to the following address: Winnt/System32/spool/drivers/color (PC) for the soft proofing of the screen.
B. Open a picture and set it as follows: Coated, Uncoated, and select reference.icc in the configuration file. If you don't have your own icc, choose US.sheetfed Coated or US.sheetfed Uncoated. The screen can be soft proofed.
2) Screen soft proofing in BestColor
A Configure the display parameters for the screen soft proof of BestColor.
In BestColor, set/Common/Display Overview/Use other display profiles (select the monitor's calibration file).
B Outputs a parameter set to the configuration file.
Select the file to be soft-screened (right click to select)
In the pop-up dialog box, configure the parameters of BestColor digital proofing, including printer basic linearity, paper overview file, and printing parameters. After configuring, click OK. The color of the picture displayed on the screen will be very similar to the color of the corresponding printed matter, that is, the screen will be soft proofed.