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	<title>Comments on: Compare / diff between two images</title>
	<atom:link href="http://positon.org/compare-diff-between-two-images/feed" rel="self" type="application/rss+xml" />
	<link>http://positon.org/compare-diff-between-two-images</link>
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	<item>
		<title>By: Newbie</title>
		<link>http://positon.org/compare-diff-between-two-images#comment-1526</link>
		<dc:creator><![CDATA[Newbie]]></dc:creator>
		<pubDate>Mon, 03 Apr 2017 11:31:59 +0000</pubDate>
		<guid isPermaLink="false">http://positon.org:81/?p=115#comment-1526</guid>
		<description><![CDATA[Actually I got &#039;missing an image filename&#039;]]></description>
		<content:encoded><![CDATA[<p>Actually I got &#8216;missing an image filename&#8217;</p>
]]></content:encoded>
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	<item>
		<title>By: Newbie</title>
		<link>http://positon.org/compare-diff-between-two-images#comment-1525</link>
		<dc:creator><![CDATA[Newbie]]></dc:creator>
		<pubDate>Mon, 03 Apr 2017 07:20:07 +0000</pubDate>
		<guid isPermaLink="false">http://positon.org:81/?p=115#comment-1525</guid>
		<description><![CDATA[Very useful, thanks a lot!!!

I am an absolute newbie to Linux, let alone scripting. I need to compare two images without re-sizing them, and output should be used by script for the following calculations (that is I don&#039;t need to see the difference visually). 

A relevant example I found is:

compare -metric MAE image1 image2 null: 2&gt;&amp;1

I changed it to:

compare -metric MAE rose1.jpg rose2.jpg null: 2&gt;&amp;1  (I have no idea what &#039;null: 2&gt;&amp;1&#039; means, would be grateful if you could explain it), 

but I got an error - cannot find the files or they don&#039;t exist. Is it because I need to specify full path to the images? or something else is wrong in this script?

Could you help me out please?]]></description>
		<content:encoded><![CDATA[<p>Very useful, thanks a lot!!!</p>
<p>I am an absolute newbie to Linux, let alone scripting. I need to compare two images without re-sizing them, and output should be used by script for the following calculations (that is I don&#8217;t need to see the difference visually). </p>
<p>A relevant example I found is:</p>
<p>compare -metric MAE image1 image2 null: 2&gt;&amp;1</p>
<p>I changed it to:</p>
<p>compare -metric MAE rose1.jpg rose2.jpg null: 2&gt;&amp;1  (I have no idea what &#8216;null: 2&gt;&amp;1&#8242; means, would be grateful if you could explain it), </p>
<p>but I got an error &#8211; cannot find the files or they don&#8217;t exist. Is it because I need to specify full path to the images? or something else is wrong in this script?</p>
<p>Could you help me out please?</p>
]]></content:encoded>
	</item>
	<item>
		<title>By: CmaJ</title>
		<link>http://positon.org/compare-diff-between-two-images#comment-1136</link>
		<dc:creator><![CDATA[CmaJ]]></dc:creator>
		<pubDate>Sun, 23 Nov 2014 12:35:12 +0000</pubDate>
		<guid isPermaLink="false">http://positon.org:81/?p=115#comment-1136</guid>
		<description><![CDATA[Very useful.  Thanks for sharing.]]></description>
		<content:encoded><![CDATA[<p>Very useful.  Thanks for sharing.</p>
]]></content:encoded>
	</item>
	<item>
		<title>By: Marius</title>
		<link>http://positon.org/compare-diff-between-two-images#comment-819</link>
		<dc:creator><![CDATA[Marius]]></dc:creator>
		<pubDate>Thu, 08 May 2014 14:00:39 +0000</pubDate>
		<guid isPermaLink="false">http://positon.org:81/?p=115#comment-819</guid>
		<description><![CDATA[Nice, that solved my problem! Thank you!]]></description>
		<content:encoded><![CDATA[<p>Nice, that solved my problem! Thank you!</p>
]]></content:encoded>
	</item>
	<item>
		<title>By: marc</title>
		<link>http://positon.org/compare-diff-between-two-images#comment-162</link>
		<dc:creator><![CDATA[marc]]></dc:creator>
		<pubDate>Fri, 10 Aug 2012 22:24:30 +0000</pubDate>
		<guid isPermaLink="false">http://positon.org:81/?p=115#comment-162</guid>
		<description><![CDATA[&lt;p&gt;thanks for your feedback.&lt;br /&gt;
I&#039;ve fixed it.&lt;/p&gt;]]></description>
		<content:encoded><![CDATA[<p>thanks for your feedback.<br />
I&#8217;ve fixed it.</p>
]]></content:encoded>
	</item>
	<item>
		<title>By: Florian</title>
		<link>http://positon.org/compare-diff-between-two-images#comment-161</link>
		<dc:creator><![CDATA[Florian]]></dc:creator>
		<pubDate>Wed, 08 Aug 2012 06:53:02 +0000</pubDate>
		<guid isPermaLink="false">http://positon.org:81/?p=115#comment-161</guid>
		<description><![CDATA[&lt;p&gt;the link for imdiff is not working anymore.... :-(&lt;/p&gt;]]></description>
		<content:encoded><![CDATA[<p>the link for imdiff is not working anymore&#8230;. :-(</p>
]]></content:encoded>
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