Color Management Application Actual Operations (Chinese)

Let's analyze the color difference between the scanner and the actual color: We open the MeasureTool tool in PM5 and click “Compare” in the menu. So we see the color difference between the two graphs in the 3 area. Value: Average delta E=0.98
Now we can say that we have completed the first step of color management and get real (or near-real) colors.

Color Management Step Two: Displaying Our Colors Correctly

A: The monitor's correction and generate the monitor's ICC,

I talk about the calibration points of several monitors: 1. Define the color temperature: Before calibrating, please make sure that your observation conditions are the same as the standard of the light source of your observation color, so that the color temperature of the monitor after calibration is as close as possible to your observation reflection and transmission. The color temperature, it is best to have a standard light source, so that your monitor color temperature and your standard light source.

2. Define an accurate display brightness: Or make your monitor's brightness match your standard viewing light! In fact, Eye One has these ambient light measurement functions.

3. Define the Gamma value to 2.2. It is recommended that the friend of Apple Computer also define the value of 2.2.

Two: After the calibration is generated, the monitor displays a simple verification method:

Create a few color blocks of known physical color Lab values ​​in photoshop. Of course, these color blocks should also be created in Lab mode. Then observe the color of the objects and the color of the blocks in the monitor. The colors and physical objects that the calibrated display should show. The color is consistent.

Three: Now we open the previously saved Lab color space scan image in PHOTOSHOP

We also said earlier that as long as our monitor is calibrated, now that we look at this picture, it must be consistent with the color of the target you see under the standard light source! I took a picture of them and compared them with a camera. We can make a comparison. Although the camera is almost, but because shooting under the same conditions should be a little explanatory value?

The third step of the color management (the important step): The correct output of our colors

There is no doubt that our ultimate goal is to output, this output we first use the printer, the most common output tool, and now we do not want to print as we thought before, because we are now talking about color management, so we now want Output is an output based on the concept of color management.

1, standardize your printer (embarrassment and concept of things) In fact, that is simple, is to check whether the ink head is blocked! Oh, then use standard paper! In order to better explain the problem, I used two different papers on two printers, R1800 and 9800. Note that none of EPSON's original paper! R1800 I used a single sheet of A3 paper from FRUBO. On 9800, I used EP517 (a Taiwanese paper we all know).

2, print standard color draft

Still to illustrate the problem, reflecting the color matching of different output devices, I created an RGB profile for the R1800 and used it as an RGB printer. I created the CMYK profile for the 9800 and used it as the CMYK printer. First of all, to establish the R1800 ICC: 1, open the TC2.83 color target (PM5 band, TC2.83 RGB I1.tif) in Photoshop, and choose not to color management, and then print, here I want to emphasize that first We close the print color management of PHOTOSHOP in PHOTOSHOP: Click “Print Preview” under the “File” menu to close the color management. Set the red box in the figure below, then press the Print key to enter the printer's print settings window, and then the printer Its own color management function is also turned off!

Step 1 Select Printer (R1800), Step 2, click Printer Properties; Step 3, Select Paper Type, This step is to complete the paper's initial linearity, because EPSON's print driver does not open the linear function of paper, we can only Select a paper linear that approximates the type of paper you are using to make this ICC profile. Step 4 Select the ICM color management option. Step 5 Turn off color management