In the Copydot process, imagesetter films are scanned in with a very high resolution and saved as "Copydot" files. A bitmap file is produced for each separation in this process. The digitization of the imaged films means that the print jobs are capable of being processed digitally.
The scanned data can be EPS, DCS-2 or PDF files for processing with the Prinect workflow.
You can make the following modifications:
•Resample monochrome images
or
•descreen monochrome images
You cannot resample and descreen Copydot documents at the same time. For that reason, you can only enable one of the options at a time.
"on" list box
This is where you can select which converter will be used. Generally, you can leave the default setting "AllCopydotConverters" as it is.
"Resample Monochrome Images" option
Check this option if you want to resample monochrome images with the set "target resolution". The value entered in "... if Input Resolution Above" defines a threshold. This means that images whose resolution is below this value will not be resampled.
This option is designed to be used whenever Copydot files have a resolution that doesn't match the connected output device. Moiré would result during imaging if Copydot data with a resolution of 2540 dpi, for example, were output to a connected imagesetter that works with 2400 dpi. In such a case, you can enable this option and enter 2400 dpi as your "target resolution". In this way, you can match screens and resolutions without any noticeable loss of quality if the differences are approx. ±10%.
"Descreen Monochrome Images" option
Check this option if you want to descreen monochrome images with the set target resolution and screen frequency and convert them to contones.
Color management or trapping can only be used on descreened Copydot data that were combined to composite pages with the Recombiner.
During descreening, the dot percentage of each screen cell is converted to the corresponding grayscale.
Note: There can be noticeable losses of quality when descreening fonts; descreening images generally presents no problem and produces high quality.
You can select a sharpness filter for text and images in the "Sharpening" list box ("None", "Low", "Normal", "High", "Maximum" or "Text"). Sharpening can in part counterbalance effects at the edges of images that were caused by descreening.
Note: Specially treated screened data ("Tiles") are not supported.