Version 5.3.02 - Serendipity Software

Input Screening
Input Screening determines how the screening on the input data is handled. There are two (2) choices – Preserve and
Descreen.
• Preserve – Preserves the dots from the incoming data so the same dots on the final job are shown on the proof.
Further choices are:
o Real Dot Technology – Used to preserve the dot structure.
o Fast-­‐2 – Similar to RDT but a faster method.
o RDT Smooth 1, 2 and 3 – This is RDT with progressive levels of smoothing.
Note: Fast-­‐2 should be used where the dot structure is not very important. It will preserve the dot but is a quick, low
quality method. The sharpest dot structure will be achieved using RDT, however you will sometimes get introduced
moire, caused by the head weaving of the printer, the resolution and the screen ruling of the original file.
• Descreen – Descreens the incoming data with either:
o D-­‐Dot – Removes the dots; or
o Fast – Quick descreening algorithm
Note: D-­‐Dot is used where the output job is being sent to a photocopier or similar device, with a front-­‐end RIP that
applies a screen of its own. If you did not remove the dot, the job would be double screened, producing poor output. Use
Fast for all other methods when the incoming screening is not to be preserved.
• Plates and Plate/Type – Override the descreening mode selected with other modes for the plates. This is
needed so that, for example, if RDT is used for all plates except Black (which uses RDT Smooth-­‐2) you will
avoid getting moire.
Postscript / PDF Options
The following options are only used when the incoming data is Postscript:
• Use Bounding Box for Page Size – Some Postscript jobs do not place a page size in the job information.
Checking this will use the bounding box as the page size.
• Simple RGB to CMYK Conversion – This is a compatibility mode from older versions of the product. Images are
converted from RGB to CMYK quickly using a basic method. The colour is not very accurate and is not
recommended for contract proofs.
• Fail on RGB Images – Causes a job to fail if it contains RGB images. If
this is not checked, the jobs will process but RGB images will be
ignored and not printed.
• Antialiased Subsampling – Used to assist in the rendering of some
fonts.
• Disable PDF Autoseparation – Turns off autoseparation for PDF files.
• Render in RGB – Allows Postscript file data to be processed in an
RGB rendering mode, with a wide gamut suitable for digital
photographic proofs/prints.
• Use CMYK simulation from PDF for unknown colours – Allow the CMYK simulations from PDF files to be
substituted for unknown spot colours.
Note: An Unknown Specials colour set can now be assigned in the Server Settings. This allows unknown special/spot
colours included in PDF or Postscript jobs to be automatically added to the set.
Resampling
Configure the method for sampling incoming data and changing the resolution from the input to that of the output. The
options are:
• Nearest Neighbour – The fastest method but less accurate. Choices are made as the closest pixels from input to
output and can result in jagged edges or stepping effects.
• Bilinear – A medium quality sampling method and can take longer than Nearest Neighbour. Bilinear takes the
weighted average of 4 pixels from input to output. Best for use with screened data.
• Bicubic – High quality sampling method which takes longer to calculate than Bilinear. Bicubic uses the
weighted average of 16 pixels from input to output. This is the default option for any new Pagesetup’s created.
Serendipity Software -­‐ Veripress User Manual – Version 5.3.02
45