Convert SVG to transparent PNG with antialiasing, using ImageMagick
Solution 1
Inkscape will do this:
inkscape \
--export-png=out.png --export-dpi=200 \
--export-background-opacity=0 --without-gui in.svg
Update
The terminology has changed: all the export params suppress gui, and the output parameter is now simply based on the file type. For example, a type of png
will cause a file in /path/to/picture.svg
to be exported as /path/to/picture.png
(caution: this overwrites output).
inkscape \
--export-type=png --export-dpi=200 \
--export-background-opacity=0 picture.svg
Note cited wiki has quotes on --export-type=png
, which is incorrect.
Also if don't have Inkscape command line, MacOS can access via bash directly:
/Applications/Inkscape.app/Contents/MacOS/inkscape
Solution 2
As a side note, I found that getting transparency was a bit tricky. Instead of using transparent, I had to use none.
convert -background none in.svg out.png
Solution 3
Actually, reading imagemagick documentation:
-antialias
Enable/Disable of the rendering of anti-aliasing pixels when drawing fonts and lines. By default, objects (e.g. text, lines, polygons, etc.) are antialiased when drawn. Use +antialias to disable the addition of antialiasing edge pixels. This will then reduce the
number of colors added to an image to just the colors being directly drawn. That is, no mixed >colors are added when drawing such objects.
the +antialias will indeed disable antialiasing.
Solution 4
The way I learned how to do this was from the methodology found here: How to convert a .eps file to a high quality 1024x1024 .jpg?
It is the same idea as @halfer's solution with inkscape
--to jack up the DPI first--but you can accomplish the same thing in just imagemagick
using the -density
option.
convert -density 200 in.svg -resize 25x25 -transparent white out.png
Solution 5
For me that works for svg to png:
convert ${src} \
-transparent white \
-background none \
-resize 345x345 \
res/drawable-xxxhdpi/${dest}
Comments
-
Andreas Gohr over 2 years
I want to convert SVG images to PNG files with transparent background and anti-aliased edges (using semi-transparent pixels). Unfortunately I can't get ImageMagick to do the anti-aliasing, the edges always look terrible. Here's what I tried:
convert +antialias -background transparent in.svg -resize 25x25 out.png
Any ideas or a different command line tool I could use?
-
Martin Poljak over 10 yearsAt least at this time (6.8.6), it works with transparent too.
-
petrsyn about 10 yearsBoth 'none' and 'transparent' create opaque white background for me. Not transparent. I'm using 6.8.8-3 on Mac
-
commonpike about 10 years
-background none
worked for me, ImageMagick 6.8.6-6 on a mac -
kostmo about 9 years@petrsyn although the command will accept the input image path as the first argument (e.g.
convert in.svg -background none out.png
, I found that this ordering will fail to make the background transparent; it resulted in an opaque white background! Make sure thatin.svg
andout.png
are the final two arguments in the command. -
timss about 6 yearsThis removed the color palette of a SVG I tried to convert (nifi.apache.org/assets/images/apache-nifi-logo.svg).
-
timss about 6 yearsThe first solution I've found that keeps the color palette of some SVGs, e.g. the logo of Apache NiFi (nifi.apache.org/assets/images/apache-nifi-logo.svg).
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fmw42 over 5 yearsImagemagick now will use Inkscape if it is installed on the system. You have the choice of: Inkscape (if on the system), RSVG delegate (must be installed with Imagemagick, or the Imagemagick internal MSVG/XML.
-
icc97 over 5 years
-background none
is indeed correct as per the image magic color names documentation: "There is also a color called 'none' that is fully transparent. This color is shorthand forrgba(0, 0, 0, 0.0)
." -
icc97 over 5 yearsThis is the relevant documentation for the
-transparent
option: imagemagick.org/script/command-line-options.php#transparent -
Domi over 3 yearsAfter fiddling with it for a while, this was the only way to get it to work - much appreciated!
-
Fredrick Brennan over 2 yearsThis solution, while it may work for many SVG files, is inferior to the
-background none
solution, because white is a valid fill/stroke color that may present in many SVG's, and this turns all white pixels transparent, even those defined as being white fills/strokes. -
Fredrick Brennan over 2 yearsThere is no reason to supply both
-transparent white
and-background none
, and this will negatively effect files with elements of the foreground that are supposed to be white. Only supply-background none
. -
Fredrick Brennan over 2 yearsThe "supply
-background none
before the SVG filename" answer is much better because it actually uses ImageMagick, the tool asked about…: stackoverflow.com/a/18579465/1901658 -
Fredrick Brennan over 2 yearsRube Goldberg would be proud.
-
Fredrick Brennan over 2 years
-background none
works just as well in recent IM releases, and avoids needing to supply-channel rgba
if the target is PNG -
halfer over 2 years@FredrickBrennan: my general view is that readers (and question authors) will use the tool that gives them the best results. If an OP is made that asks how to knock in a nail with a screwdriver, sometimes an answer that recommends a hammer anyway is best, even if it is "not what they asked for".
-
halfer over 2 years(Nice to hear there's more than one way to do it though 😌).
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C Würtz over 2 yearsI'm sorry @FredrickBrennan, I do not understand. Did you tried without the background rect on Imagick?
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Fredrick Brennan over 2 yearsWell, since user said they needed command line tool, I assume servers are involved, and ImageMagick is easier is much easier to run on servers, not requiring a little of Xorg dependencies. But yes, OK.
-
Fredrick Brennan over 2 yearsYes, you only need
-background none
option toconvert
. -
Iulian Onofrei over 2 yearsThey got it backwards :|
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pyramation over 2 yearsthis works! if it doesn't you probably have a background inside of your SVG that you're unaware of! That took me a while to find out lol...