Use ImageMagick with python. (on a linux system)

Question

I want to define a function that "call" imagemagick to convert an image.

def convert(filein,fileout):
#imagemagick>convert filein fileout

How can I call and use imagemagick with Python?

I'm running on a linux system, imagemagick is installed, and I'm not using PIL.module because it doesn't handle PPM[p3].

give Wand a try, http://docs.wand-py.org/en/0.4.1/ – Chris Montanaro Sep 02 '15 at 17:25 — Chris Montanaro, Sep 02 '15 at 17:25

minhee · Answer 1 · 2013-09-10T04:56:38.547

16

Disclaimer: I am the author of Wand.

You can easily do that using Wand, a simple binding of ImageMagick for Python. For example, the following code converts a PNG image to a JPEG image:

from wand.image import Image

with Image(filename='in.png') as img:
    img.format = 'jpeg'
    img.save(filename='out.jpg')

edited Sep 10 '13 at 04:56

answered Aug 20 '12 at 23:44

minhee

Can you resize it to 300% , how do you add the flatten , and how do you change the background ? – Aysennoussi Dec 19 '14 at 13:14

score 8 · Accepted Answer · answered Feb 17 '11 at 11:23

8

Either use one of the shell interfaces of Python (os.system, subprocess.Popen) to call the imagemagick binary, or try out PythonMagick.

answered Feb 17 '11 at 11:23

Creshal

score 6 · Answer 3 · answered Aug 03 '12 at 05:26

6

I would suggest u use subprocess it is safer

import subprocess
params = ['convert', 'src_file', 'result_file']
subprocess.check_call(params)

answered Aug 03 '12 at 05:26

Rakesh

Good answer, also has the benefit that you don't need to load it into memory if it's already on disk – Mitchell Currie Sep 16 '15 at 06:57

score 3 · Answer 4 · answered Feb 17 '11 at 11:26

I have not used image magic but you could use os.system to call a shell command:

import os
os.system('imagemagick-converting-command filein fileout')

I suggest you go with PythonMagic as Creshal said. It is provided by ImageMagic and thus must be one of the best port available for python.

4 Answers4