Changing the color rendering value

While the InfoPrint 5000 produces vibrant full-color images, including images that contain gradients and shading, it is not able to reproduce every shade of every color. The color rendering intent value (color-rendering-intent attribute) determines what InfoPrint Manager does when it encounters a shade in a PostScript image that the InfoPrint 5000 cannot reproduce exactly.

There are two possible values for color rendering intent:

Relative
When InfoPrint Manager encounters a color that InfoPrint 5000 cannot reproduce, it substitutes the closest color value that it can reproduce.
Perceptual
When InfoPrint Manager encounters a color that InfoPrint 5000 cannot reproduce, it adjusts all of the colors in the image so that they maintain their color relationships to each other. The result is an image that is pleasing to the eye, but that might not look exactly like the original image.

The default value is Relative.

You can set the color rendering intent value on a print job, a default document, or on an actual destination using either the command line or the InfoPrint Manager Administration GUI. Follow this procedure to set the attribute using the InfoPrint Manager Administration GUI.

  1. Start the InfoPrint Manager Administration GUI.
  2. If you have not already customized the InfoPrint Manager Administration GUI to add the Change AFP Color task to the Printer, Printer → Job and Document Defaults, Job, and Logical → Job and Document Defaults menus, complete these steps:
    1. Select Options → Customize.
    2. In the Customize dialog, click the Printer tab.
    3. In the Action column, find Change AFP Color and Job and Document Defaults Change AFP Color and select the check box in the Menu column next to it.
    4. Repeat steps 2.1 through 2.3 about the Job and Logical tabs.
    5. Click OK to apply the settings and close the dialog.
  3. Select the object that you want to set the color rendering intent value for by clicking it once.
  4. Use the menu items you added in step 2 to open the appropriate Change AFP Color dialog:
    • For an actual destination, select Printer → Change AFP Color.
    • For a default job on an actual destination, select Printer → Job and Document Defaults → Change AFP Color.
    • For a default job on a logical destination, select Logical → Job and Document Defaults → Change AFP Color.
    • For a job that has already been submitted, select Job → Change AFP Color.
  5. In the Change AFP Color dialog, find the Color rendering intent field, select a value from the drop-down list, and click OK.

There are three methods that you can use to change the color rendering value for your print job.

  1. Set the value in the PostScript data stream when you create the print job.
  2. Add a line to the configuration file for the InfoPrint Manager PostScript to AFP transform.
    1. On your InfoPrint Manager server, locate the ps2afpd.cfg file.
    2. Open the file in a text editor.
    3. Add this line to the file: pragma colorRendering=perceptual
    4. Save and close the file.
    All of the PostScript files that are sent through the ps2afp transform will now use perceptual color rendering.
  3. Add a flag to the ps2afp command when you issue it. This option only applies if you are using the Infoprint transforms independently of InfoPrint Manager; for example, to convert your files into AFP before you submit your print jobs so they print more quickly. To change the color rendering value, add this flag to the ps2afp command:

    –pragma colorRendering=perceptual

    For example, to convert a PostScript file called mybook.ps to AFP using perceptual color rendering, you would issue this command:

    ps2afp -pragma= colorRendering=perceptual mybook.ps

    See InfoPrint Manager: Reference for additional information about using the ps2afp transform.