About the solution to abnormal PS colors – Beginner’s Tutorial

About the solution to the abnormal color of PSAbout the abnormal color of PS
Symptom: The display color is normal, but the image opened in PS is reddish

Reason: The color profiles of the monitor and PS are different

Solution: Press Ctrl Shift Alt and click the PS software to restore the PS to its original state.
The default RGB profile of PS is SRGB IEC6 1996-2.1. Set the monitor profile to be the same as PS. Right-click on the desktop/Properties/Settings/Advanced/Color Management/Add, select the SRGB Color Space Profile file, and then set into the default value. Then, the method to verify whether the display and screen capture are consistent is to open a picture in PS, display it 100%, capture the screen, and then paste it in. The two pictures overlap, use the difference mode, and the black color proves that the two pictures are exactly the same, and the colors are the same. It’s over
Why is the jpg generated by photoshop darker
Problem description:
When the picture is opened in PS, it becomes brighter, and then it returns to its original brightness when saved.

Solution:
Specify configuration file—–Configuration file—–sRGB IEC61966-2.1

Cause of the problem:
In RGB mode, the color space is not absolute either. The color gamut of the Adobe RGB color space is significantly larger than that of sRGB IEC61966-2.1. Pictures processed with this color space have naturally bright colors and soft transitions. In this space, it is very suitable for the conversion of images from RGB to CMYK. But unfortunately, the Adobe RGB color space is only valid in PS. Once you leave PS, the image color will change back. (Reminds me of Cinderella’s magic, which expires after twelve o’clock).
In fact, the North American General Purpose 2 and Web settings in the color settings are the sRGB IEC61966-2.1 color space.
Another note: When the image is saved in JPEP format, due to the compression algorithm, the color transition will become poor or distorted.
Reject the embarrassment of color difference and use sRGB monitor to create real colors
[Source: Computer News] [Author: Bai Yang] Time: December 30, 2005 12:05
As the most important output device of a computer, the monitor is undoubtedly the most direct basis for observing and controlling the color quality of works for people who use Photoshop. However, for non-professionals like us, since we only use ordinary display products In design works, we often encounter the embarrassment of a huge color difference between the computer display effect and the final product. It will waste a lot of time in the later color adjustment. Fortunately, many civilian-level display products have added support for the sRGB standard. Let us It can improve the display accuracy and achieve quasi-professional effects. Of course, the implementation method is not difficult. If your monitor does not yet have the sRGB function, please click “sRGB is the way to go in the digital age! Five colorful LCD recommendations“.
After completing the above operations, the image operations performed in the PS software can achieve the WYSIWYG effect, and the final output product will not have the same color deviation as at the beginning, which is quite trouble-free for later color grading.
Some readers may have monitors that do not support sRGB mode display due to early purchase or technical reasons. After reading this article, you don’t have to worry too much. When following this article, you can set the monitor color temperature to 9300K. Just set the system ICC to the same ICC as the monitor model (generally found in the monitor installation CD), such as Trinitron Compatible 9300K G2.2.icm, Diamond Compatible 9300K G2.2.icm, or use the ICC Monitor Profile Builder software to generate ICC profile of your own monitor. Finally, when setting up the Photoshop software, set the RGB of the workspace to the same file name as the system ICC.

sRGB represents the standard red, green, and blue, the three basic colors of the relevant output settings. The sRGB color space is based on independent color coordinates, which allows colors to correspond to the same color coordinate system when used and transmitted by different devices, without being affected by the different color coordinates of these devices, so it can effectively avoid conflicts between monitors. Color difference.

The experimental environment of this article: Philips 107S6 PhotoshopCS Windows2000
　
Monitor settings

Figure 1

Since the setting methods of each monitor are different, you need to make adjustments according to your monitor’s manual. Enter the monitor adjustment interface, select the color temperature (COLOR) item, select the sRGB item (Figure 1), and press the OK button to enable the settings. The settings will take effect, and then we need to make relevant settings for the system and software.
System ICC color management settings

Figure 2

Enter the display properties settings in the Windows system (right-click on the desktop to enter the Settings tab), and select “Advanced→Color Management” in sequence. Here we need��Modify or add the system’s color mapping file to match the sRGB display mode (Figure 2). Click the Add button, select the ICC profile adobeRGB1998 in the dialog box that pops up (this file is better than the ICC file description of sRGB and has a wider color gamut), and press “OK” to complete. After doing this, you still need to specify ICC in different design software. Let’s take Photoshop as an example to operate
ICC settings in Photoshop

Figure 4
After finishing the peripherals, we finally need to do some optimization on PS to complete the construction of this quasi-professional color creation space. After starting Photoshop, select Edit → Color Settings (Figure 3). In the interface of Figure 4, set the RGB of the workspace to adobeRGB1998 and press “OK” to complete.) Other items can be set by referring to Figure 4. Close the program and restart the system for the configuration to take effect.

Teach! Let the display restore the true “original appearance” of colors
We know that whether it is an LCD type monitor or a CRT type monitor, their color reproduction function is not as ideal as we imagined. That is to say, no matter how superior the performance of the monitor is, there is still color difference. We can see through the display screen The color you see is never the “original” color of the image. So, can we only make the display work in two states: true color and enhanced color? The answer is no. As long as our monitor supports the sRGB standard, we have a way to let the monitor restore the true appearance of the image color. Next, let us take a look at how to restore the “original” colors of the monitor!
In order to allow the monitor to truly display the “original appearance” of the image color, no matter what type of image software we use to edit the target image, as long as it is related to the image color, we need to adjust the sRGB of the image editing software first. , only in this way can the images edited by this image editing software achieve the most realistic color display effect. Below, this article uses the common Photoshop image editing program as an operating blueprint to introduce in detail how to adjust the monitor to truly display the “original appearance” of colors.
First we need to set the monitor mode appropriately. Considering that most monitor products on the market currently support the sRGB working mode, we must first confirm that the monitor currently in use is already in the sRGB working mode. If we find that it is not in this working mode, we must adjust the monitor in time. set up. Since the setting methods of monitors of different brands and models are completely different, it is best to refer to the operating instructions of the monitor for targeted viewing and settings. Generally speaking, when setting the working mode parameters of the monitor, you need to go through three steps. The first is to open the color adjustment setting window of the monitor, the second is to enter the color temperature setting option page, and the third is to select the sRGB working mode and click Click the “OK” button to confirm, which will put the monitor in sRGB working mode.
Secondly, we also need to set the display properties of the computer system appropriately. When performing this setting operation, you can follow the following steps: First, right-click a blank area of ​​the Windows system desktop, execute the “Properties” command from the shortcut menu that appears, and open the system display property setting interface of the local computer. ;Click the “Settings” tab in the settings interface, and in the corresponding settings tab page, click the “Advanced” button to enter the system’s advanced display property settings window; Click “Color Management” in the settings window “tab to open the option setting page shown in 1. In this page, we can add or modify the color management file of the local computer system to match the sRGB working mode; if it is found that the local system does not have a ready-made color configuration file, You can directly click the “Add” button to open a file selection dialog box titled “Add Profile Association”, then select the “sRGB Color Space Profile.icm” file, and finally click the “OK” button to complete the system. Displays the property setting task.

Now we need to specify the ICC in the Photoshop image editing program. The so-called ICC is actually an international standard for color management systems. Almost most operating systems and application software support this international standard. Image editing in PhotoshopWhen specifying the ICC standard in the program, you can first run the Photoshop image editing program. In the pop-up program editing window, click the “Edit” option in the menu bar, execute the “Color Settings” command from the pop-up drop-down menu, and open As shown in Figure 2, in the color setting dialog box, in the “Workspace” setting item of the dialog box, change the “RGB” parameter to “sRGB IEC61966-2.1”. You can use the default values ​​for other parameters, and finally click “OK” ” button, so that when the image edited through the Photoshop image editing program is displayed on the monitor, there will be no color difference.

Of course, if the monitor we are currently using does not support the sRGB display standard, we also have a way to make it display the true appearance of the color. We only need to open the color adjustment setting window of the monitor, enter the color temperature setting page, and then set the color temperature parameters to 9300K, then follow the above setting steps to set the color profile of the system display properties to the exact same ICC as the monitor model, and finally modify the “RGB” parameter of the workspace in the Photoshop image editing program to be the same as the computer A system ICC consistent file name will do.
Tips:sRGB stands for standard red, green, and blue, namely CRT monitors, LCD panels, and projectors
The three basic pigments used in color reproduction in printers, printers, and other devices. The sRGB color space is based on independent color coordinates, which allows colors to correspond to the same color coordinate system when used and transmitted by different devices, without being affected by the different color coordinates of these devices. The sRGB of the projection display system was developed by Microsoft in cooperation with Seiko Epson and Mitsubishi. The purpose is to establish a color management standard that can meet the needs of computers and projection displays, so that the display device can correctly display the color information without undergoing special color information analysis. Display image files. sRGB eliminates the original differences in color reproduction between different display systems. RGB colors naturally vary between different display devices, so colors cannot be reproduced correctly after passing through different display devices. Today, as computer-assisted presentation equipment increasingly becomes a key tool in market development, correct image and color reproduction is more important than ever. With sRGB technology, users can ensure uniform colors regardless of whether they use a CRT device or a projector that adapts to the sRGB standard.

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