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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This can be done via adding the following to the command line: If you can, you should consider using the ijs driver instead. This is the default.

The tiffsep device will automatically recognize spot colors. Bounding box output There is a special bbox “device” that just prints the bounding box of each page.

This is done because the XCF format does not currently support spot colors. Dots per inch Dots per inch or dpi is the common measure of printing resolution in the US.

File names for the separations for the CMYK colorants are created by appending ‘.

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

All driver authors are encouraged to adapt their drivers for IJS, and if there is an IJS driver available for your printer, it should be your first choice.

This can be very useful to reduce the memory requirements when printing in True Color on some high resolution ink-jet color printers. This can be changed by: This option is useful if GS is intended to print pages in the background, without any user intervention. IJS is included by default on Unix gcc builds, and also in autoconf’ed builds. Due to a problem with the device driver in the kernel the reason for printer failure isn’t always reported correctly to the program.


Options specific to particular file formats are described in their respective sections below.

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

There are also another device devicen in the same source file. It’s intended for testing only. This order also matches the ordering in the SeparationColorNames list, if this parameter is specified. After the spotcmyk device produces the binary data files, the files are read and PCX format versions of these files are created with “.

The resulting files are numbered: The device also produces a binary data file similar to the bitmono device for each spot color plane. PSD is the image format used by Adobe Photoshop. The fax devices are faxg3faxg32d and faxg4.


These options can be set through the inclusion of a setup file on the command-line:. The slopes seem like staircase. It is selected like this:. Depth 15 isn’t well-tested, and it may be desirable, for serious use, to switch to depth 24 with: The size of the subsampling box n should be 4 for optimum output, but smaller values can be used for faster rendering.

There appears to be no way to reset the printer to initial values. Any patents that do cover the code are invalid in your jurisdiction.

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If you have problems with specific PDFs, you could sntialiasing an example. If you read the thread for the bug you opened in Bugzilla you’ll see why other options aren’t going to work, you need to use one of the ‘scaled’ devices.

You can change the handling of the elements that are antialiased.

If no Windows printer name is specified in -sOutputFileGhostscript prompts for a Windows printer using the standard Print Setup dialog box. Please refer to VectorDevices.

Finally, the PCLm device supports the -dStripHeight switch to set the vertical height of the strips of image content, as required by the specification. The spot color numbers are not affected by the SeparationOrder parameter. The recognized parameters are the following:. You could probably test some things to reduce the jagged edges blurring or something like thatbut personally, I would stay with the unmodified source images.

Tumble controls the orientation. Multi-strip files reduce the memory requirement on the reader, since readers need only store and process one strip at a time. Trapping is a process whereby the output is adjusted to minimise the visual impact of offsets between each printed plane.