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Vince W.
Vince W.

Reputation: 3785

how to export svg to png on the command line without antialiasing

I need to do some batch processing of svg files. SVG elements are all either black or white and I need bitmap images that are monochrome (black/white, no grayscale).

From within the inkscape gui I can just select this as an option.

enter image description here

However, I don't see any inkscape cli options related to antialiasing

Same for librsvg, (rsvg-convert) no command line options in the manual related to anti-aliasing.

Second thought was to just export to a png image and then use ImageMagick to threshhold the image. However, on my system

Mac OSX catalina (latest)
brew install imagemagick -> 7.0.10-23

when I run the following, i get an error:

>>> convert test.im.png -channel RGB -threshhold 50% test.im.t.png
convert: unrecognized option `-threshhold' @ error/convert.c/ConvertImageCommand/3112.

looking for a little help on how to get from a black and white svg to a black and white png on the command line for batch processing given these problems.

Upvotes: 2

Views: 5685

Answers (2)

dtbaker
dtbaker

Reputation: 4919

It seems this will be added in version 1.4 of inkscape, which as of now (March 2024) needs to be compiled manually. It's not in the linux ppa 1.3 version yet either.

Have compiled and tested, works well.

The new --export-png-antialias command line option, which you can set to 0 (none) to 3 (best)

Here is the source code showing the new version:

https://gitlab.com/inkscape/inkscape/-/blob/master/src/actions/actions-output.cpp?ref_type=heads#L315

Upvotes: 1

fmw42
fmw42

Reputation: 53081

On IM 7, use magick, not convert. So try

magick +antialias image.svg -channel RGB result.png

or

magick image.svg -channel RGB -threshold 50% result.png

If one of these works, then you can process a whole folder of files using magick mogrify. See https://imagemagick.org/Usage/basics/#mogrify

Upvotes: 1

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