September 30, 2020

I am trying to use ghostscript to convert PDFs to TIFFs. It works nicely except that anti-aliasing does not appear to happen even when I request it. ?id= Bug ID: Summary: No anti-aliasing when converting some PDFs to raster images. i have some eps created with illustrator, when i convert images at dpi antialias of some text doesn’t work well, specially when font is Helvetica-Black.

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In connection with -multipage file is extended by the page number as shown in this example: Image file formats Ghostscript supports output to a variety of image file formats and is widely used for rasterizing postscript and pdf files. The image is not cropped by default. If it returns nullthen the feature is not supported by the selected printer. It should be present right after the include of icclib.

SeparationColorNames An array giving the names of the spot colors SeparationOrder An array giving the names and order of the colorants to be output. Please see the Use documentation for a complete description. There are four devices named pdfimage8, pdfimage24, pdfimage32 and PCLm.

[gs-bugs] [Bug ] New: No anti-aliasing when converting some PDFs to raster images

For 6- and 7-color devices, the target color space for the output profile is currently a 4-component space. The Rinkj driver is an experimental new driver, capable of driving some Epson printers at a very high level of quality.

The values for Unix are as follows: See in the usage documentation all the paper sizes predefined in Ghostscript. Otherwise, the page image will be scaled. As of the 0. Attempting to do so will generate an error. Files can be seen in the “imagick” folder here: Use a blur perhaps? This is a general option telling Ghostscript what to name the output. Options The display device has several user settable options. And once it’s built, you won’t have to recompile Ghostscript to support new drivers!


Fatal errors cause the print job to be terminated.

It is selected like this: The 1 bit per component output is halftoned using the current screening set by ‘setcolorscreen’ or ‘sethalftone’ which allows for ordered dither or stochastic threshold array dither to be used. Values of 0 to 2 work as expected, but values 3 and 4 while accepted for compatibility will behave as for 2.

IJS is included by default on Unix gcc builds, and also in autoconf’ed builds. Please see their website for details. This software is distributed under license and may not be copied, modified or distributed except qntialiasing expressly authorized under the terms of that license.


Options specific to particular file formats are described in their respective sections below. The spot color numbers are assigned in the same order as the names are printed to stderr see below.

Writing to stdout, pipes or other similar stream is not supported.

The tiffscaledtiffscaled4tiffscaled8tiffscaled24 and tiffscaled32 TIFF drivers also provide the following two parameters: First, make sure the IJS device is selected:. HP provides official drivers for many of their Deskjet printer models. The psdcmykog device produces PSD files with 6 components: Antixliasing that the Unix printer daemon handles 8-bit binary data properly; in my SunOS 4. Typically this involves slightly extending abutting regions that are rendered in different inks.

[gs-bugs] [Bug 694413] New: No anti-aliasing when converting some PDFs to raster images

This code is disabled by default; see the note below as to why. If no Windows printer name is ghoatscript in -sOutputFileGhostscript prompts for a Windows printer using the standard Print Setup dialog box. If an integer value is given, it defines the total height. When rendering a PDF document, Ghostscript can deteremine prior to rendering how many colorants occur on a particular page.


The device also produces antoaliasing binary data file similar to the bitmono device for each spot color plane. Unfortunately, due the unpredictable size of compressed output, we cannot automate the selection of BigTIFF, using it only when the output file grows large enough to warrant it.

If you resize the dpi images to a lower resolution, the jagginess will also be a bit reduced of course. There are a few undocumented parameters stored in the UserSettings dictionary.

Bug – Anti-aliasing does not work when reading a PDF

Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. This is a general option telling Ghostscript what to name the output. The pngalpha device is bit RGBA color with transparency indicating pixel coverage.

The conversion from this into the 6- or 7-color space the “ink split” is done by lookup tables antialiasiing the setup file. Fatal errors cause the print job to be terminated.