Understanding Normalize Settings
This part contains more in-depth information on a number of settings of the Normalize Task Processor.
Conversion Limitation from Separations into Composite
This feature has the following limitations:
•Recombine only works when PostScript is sent to the Normalize Task Processor.
•Ensure that CCITT Group 4 is chosen for Monochrome in the Image Handling options (for CopyDot support).
•This option will only work with fully DSC-compliant PostScript.
•Since the decision to separate was already made in the authoring application, it is not possible to change the spot color behavior of the resulting PDFs. You will only be able to choose “keep as spot” or “map to other spot”.
•Adobe Acrobat or Acrobat Reader will not correctly view the resulting PDF. Since recombine is a process where separations are placed in one file using the overprint mode, only the last separation in the file (usually black) will be viewed. To obtain a correct preview of files in Acrobat 5.0.5 or higher, you have to enable overprint preview in the View menu of Acrobat.
•You cannot change the overprint behavior, or perform (in the Render Task Processor) on these recombined separations.
Transfer Functions
Dot gain occurs when the ink that make up a printed image are larger (for example, due to spreading on paper) than in the . Dot loss occurs when the dots print smaller.
For example, a file that is intended for output on a particular imagesetter may contain transfer functions that compensate for the dot gain associated with that printer. Transfer functions are specific to an output device, and are typically loaded and managed on the Render Task Processor. If however, the input file contains transfer curves, you may want to preserve this information.
Halftone Information
Halftone information consists of dots that control how much ink is deposited by halftone devices at a specific location on the paper. Varying the dot size and creates the illusion of variations of gray or continuous color. For a CMYK image, four halftone screens are used: one for each ink used in the printing process. In traditional print production, a halftone is produced by placing a halftone screen between a piece of film and the image and then exposing the film. Electronic equivalents, such as in Adobe Photoshop, let users specify the halftone screen attributes before producing the film or paper output. As with transfer functions, halftone information is intended for use with a particular output device.