[[Vorlage(Archiviert)]]

Ein kleines Modul, das die Verwendung von ImageMagick in Python ermöglicht. 
{{{#!code python
#!/usr/bin/env python
# -*- coding: utf-8 -*-
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Library General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

from popen2 import popen2

class image:
        def __init__(self, image):
                self.img = image
        def output(self):
                return self.img
        def execute(self, cmd):
                r,w = popen2(cmd)
                w.write(self.img)
                w.close()
                self.img = r.read()
        def resize(self, width, height="auto"):
                if height != "auto": scale = str(width)+"x"+str(height)+"\!"
                else: scale = str(width)
                self.execute("convert - -resize "+scale+" -")
        def rotate(self, angle):
                self.execute("convert - -rotate "+str(angle)+" -")
        def contrast(self, value):
                self.execute("convert - -contrast "+str(value)+" -")
        def mirror(self, vertical):
                if vertical: op = "-flip"
                else: op = "-flop"
                self.execute("convert - "+op+" -")
        def raisedborder(self, width):
                scale = str(width)+"x"+str(width)
                self.execute("convert - -raise "+scale+" -")
        def loweredborder(self, width):
                scale = str(width)+"x"+str(width)
                self.execute("convert - +raise "+scale+" -")
        def colorborder(self, width, color):
                scale = str(width)+"x"+str(width)
                self.execute("convert - -bordercolor \#"+color+" -border "+scale+" -")
        def roll(self, x, y):
                self.execute("convert - -roll "+str(x)+"x"+str(y)+" -")
        def gaussianblur(self, radius=2):
                self.execute("convert - -gaussian "+str(radius)+" -")
        def radialblur(self, angle):
                self.execute("convert - -radial-blur "+str(angle)+" -")
        def charcoal(self, factor):
                self.execute("convert - -charcoal "+str(factor)+" -")
        def colorize(self, value):
                self.execute("convert - -colorize "+str(value)+" -")
        def implode(self, factor):
                self.execute("convert - -implode "+str(factor)+" -")
        def solarize(self, factor):
                self.execute("convert - -solarize "+str(factor)+" -")
        def spread(self, size):
                self.execute("convert - -spread "+str(size)+" -")
        def emboss(self, radius):
                self.execute("convert - -emboss "+str(radius)+" -")
        def edge(self, radius):
                self.execute("convert - -edge "+str(radius)+" -")
        def noise(self, factor):
                self.execute("convert - -noise "+str(factor)+" -")
        def painting(self, factor):
                self.execute("convert - -paint "+str(factor)+" -")
        def swirl(self, deg):
                self.execute("convert - -swirl "+str(deg)+" -")
        def monochrome(self):
                self.execute("convert - -monochrome -")
        def negate(self):
                self.execute("convert - -negate -")
        def normalize(self):
                self.execute("convert - -normalize -")
        def overlay(self, color):
                self.execute("convert - -opaque \#"+color+" -")
        def maketrans(self, color):
                self.execute("convert - -transparent \#"+color+" -")
        def shade(self, azimuth, elevation):
                args = str(azimuth)+"x"+str(elevation)
                self.execute("convert - -shade "+args+" -")

################################################################################
#Kleines Beispiel, das die Datei test.jpg bearbeitet
################################################################################
if __name__ == "__main__":
        bild = image(file("test.jpg").read())
        bild.resize(600)
        bild.spread(2)
        bild.gaussianblur(4)
        bild.swirl(-50)
        bild.spread(2)
        bild.swirl(50)
        bild.spread(2)
        bild.radialblur(4)
        bild.gaussianblur(4)
        file("test2.jpg","w").write(bild.output())

}}}

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# tag: Programmierung