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	<title>Thomas Schwärzl &#187; tutorial</title>
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		<title>2 Bilder mit Python vergleichen</title>
		<link>http://schwaerzl.de/2009/12/2-bilder-mit-python-vergleichen/</link>
		<comments>http://schwaerzl.de/2009/12/2-bilder-mit-python-vergleichen/#comments</comments>
		<pubDate>Mon, 28 Dec 2009 19:52:51 +0000</pubDate>
		<dc:creator>Thomas Schwärzl</dc:creator>
				<category><![CDATA[imaging]]></category>
		<category><![CDATA[librarys]]></category>
		<category><![CDATA[pil]]></category>
		<category><![CDATA[python]]></category>
		<category><![CDATA[compare]]></category>
		<category><![CDATA[difference]]></category>
		<category><![CDATA[howto]]></category>
		<category><![CDATA[image]]></category>
		<category><![CDATA[imagechops]]></category>
		<category><![CDATA[tutorial]]></category>

		<guid isPermaLink="false">http://schwaerzl.de/?p=201</guid>
		<description><![CDATA[Hier ein kleines Tutorial wie man zwei Bilder mit Python bzw. mit PIL (Python Imaging Library) vergleicht. Sofern die zwei Bilder gleich sind geben wir &#8216;True&#8216; zurück, andernfalls ein None. #!/usr/bin/env python # -*- coding: utf-8 -*- import ImageChops import Image &#160; def img_equal&#40;im1, im2&#41;: im1 = Image.open&#40;im1&#41; im2 = Image.open&#40;im2&#41; return ImageChops.difference&#40;im1, im2&#41;.getbbox&#40;&#41; is [...]]]></description>
			<content:encoded><![CDATA[<p>Hier ein kleines Tutorial wie man zwei Bilder mit Python bzw. mit <a href="http://www.pythonware.com/products/pil/" target="_blank">PIL (Python Imaging Library)</a> vergleicht. Sofern die zwei Bilder gleich sind geben wir &#8216;<strong>True</strong>&#8216; zurück, andernfalls ein <strong>None</strong>.</p>

<div class="wp_syntax"><div class="code"><pre class="python" style="font-family:monospace;"><span style="color: #808080; font-style: italic;">#!/usr/bin/env python</span>
<span style="color: #808080; font-style: italic;"># -*- coding: utf-8 -*-</span>
<span style="color: #ff7700;font-weight:bold;">import</span> ImageChops
<span style="color: #ff7700;font-weight:bold;">import</span> Image
&nbsp;
<span style="color: #ff7700;font-weight:bold;">def</span> img_equal<span style="color: black;">&#40;</span>im1, im2<span style="color: black;">&#41;</span>:
    im1 = Image.<span style="color: #008000;">open</span><span style="color: black;">&#40;</span>im1<span style="color: black;">&#41;</span>
    im2 = Image.<span style="color: #008000;">open</span><span style="color: black;">&#40;</span>im2<span style="color: black;">&#41;</span>
    <span style="color: #ff7700;font-weight:bold;">return</span> ImageChops.<span style="color: black;">difference</span><span style="color: black;">&#40;</span>im1, im2<span style="color: black;">&#41;</span>.<span style="color: black;">getbbox</span><span style="color: black;">&#40;</span><span style="color: black;">&#41;</span> <span style="color: #ff7700;font-weight:bold;">is</span> <span style="color: #008000;">None</span>
&nbsp;
<span style="color: #ff7700;font-weight:bold;">if</span> img_equal<span style="color: black;">&#40;</span><span style="color: #483d8b;">'/home/someshot.png'</span>, <span style="color: #483d8b;">'/home/anotherone.png'</span><span style="color: black;">&#41;</span>:
    <span style="color: #ff7700;font-weight:bold;">print</span> <span style="color: #483d8b;">'jepp - they are equal'</span>
<span style="color: #ff7700;font-weight:bold;">else</span>:
    <span style="color: #ff7700;font-weight:bold;">print</span> <span style="color: #483d8b;">'everything ok - keep on rockin'</span></pre></div></div>

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