photoprint-building-icc-profiles

  • 28 July 2015 00:05:30
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General Theory

Color Printer Calibration is usually performed using a densitometer (or, as it began to do more and more, using a colorimeter or spectrophotometer) and the accompanying software. During calibration the device is configured in such a way that the resulting imprint on it coincides with the values ​​specified in the program. When it comes to a color printer, the calibration provides an output necessary levels "cyan", "magenta", "yellow" and "black" dye.

A typical test image thus consists of several series of monochrome plates - one row for each primary color. In each row is put a few plates with different percentages of the same color - usually in increments of 5 or 10 per cent, starting from zero and ending with a solid coating.

further and measure the printed scales and calculated linearity of the device, that is, its ability to accurately display the percentage that is specified calibration program. Test results are sent back to the program, which performs internal migration PostScript-commands that control the color values ​​being sent to the output device.

process of building a printer profile is reduced to printing and measurement of test patterns to determine the range of colors achievable on this unit. For a printer test pattern is a standard sample CMYK-shades, printed on the device.

software for profiling printers use a test pattern consisting of 500 or more colored dice. This image is displayed on the printer. Then mark is measured, and the obtained colorimetric data is calculated color space of a particular printer and its relation with the space or XYZ SIE SIELAB. This information is becoming a major component of the individual profile of the printer.

As clarified in the process of profiling capabilities of the printer to reproduce the full range of different colors (as opposed to the individual densities of the individual dyes), to collect information and conduct measurements need to use a colorimeter or spectrophotometer.

PhotoPRINT SERVER-PRO to build an ICC profile.

And so to business:

Open PhotoPRINT SERVER-PRO.

In the Setup menu, run Color Profiler

In the window that opens, you will need to make the settings that are responsible for the operation of the printer and the type of material used.

FMXPress diffusion - screening algorithm using pseudo random
mixing colors, a maximum speed of screening.

After confirming the change and save the settings, the following dialog box:

In paragraph number 1 will be required to register by channel the maximum amount of ink (INK LIMIT). Selecting is done by printing the test print (button TEST PRINT).

item number 2 responsible for linearization - account nonlinearity of ink spreading when you change the print density.
Use the Print Target to print files with the required linearization value range. Then press the Measure button and using a spectrophotometer (colorimeter) to remove the value prints. The equipment calculates the density of the non-linearity of the paint and with due regard FINDINGS PERSONAL TEST SCALE.



view of linearisation curve linearization.

Next prodelanyh control measurements and save results.

Go to Step № 3. In this window, print a test table limits the amount of ink on every combination (Test Print). Installable you limit values ​​depend on the combination of ink / media and, therefore, vary. Experiment to get the best results.

In paragraph № 4. proceeds to build an ICC profile. After printing, the measurement and control of test patterns need to select the desired values ​​and methods of generation of black color reproduction. And generate a profile.

After this, confirm all infusions with OK. That's all. Good luck.

 
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