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	<title>cowjuice.org &#187; HDR</title>
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		<title>HDR Experiment</title>
		<link>http://cowjuice.org/blog/2009/02/25/hdr-experiment/</link>
		<comments>http://cowjuice.org/blog/2009/02/25/hdr-experiment/#comments</comments>
		<pubDate>Wed, 25 Feb 2009 01:29:14 +0000</pubDate>
		<dc:creator>cornet</dc:creator>
				<category><![CDATA[Uncategorized]]></category>
		<category><![CDATA[HDR]]></category>
		<category><![CDATA[photography]]></category>

		<guid isPermaLink="false">http://cowjuice.org/blog/?p=11</guid>
		<description><![CDATA[After my last blog post I decided tonight to have a quick bash at creating a HDR photo of where we are currently moored (better 1/2 lives on a boat)
Didn&#8217;t finish work till 22:30 so got back to boaty and, after some food, went outside to take some photos.
As this was purely an experiment I [...]]]></description>
			<content:encoded><![CDATA[<p>After my last blog post I decided tonight to have a quick bash at creating a HDR photo of where we are currently moored (better 1/2 lives on a boat)</p>
<p>Didn&#8217;t finish work till 22:30 so got back to boaty and, after some food, went outside to take some photos.</p>
<p>As this was purely an experiment I didn&#8217;t spend too much time getting the composition &#8216;just right&#8217; or playing around too much with the exposure. Just fired off 6 shots, increasing the shutter speed every time (I really should have been knocking down the f-stop but what they hell).</p>
<p>Anyhoo, back on boaty I fired up <a href="http://qtpfsgui.sourceforge.net/">qtpfsgui</a> and loaded the images in. Once done, accepting the defaults, I entered the tone map dialogue to create the LDR output. Now there are 6 or 7 different algorithms to choose from and I ended up picking the mantiuk one.</p>
<p>Here is the result:</p>
<p><a title="hdr1_pregamma_1_mantiuk_contrast_mapping_0.3_saturation_factor_0.8 by cornet, on Flickr" href="http://www.flickr.com/photos/cornet/3307948162/"><img src="http://farm4.static.flickr.com/3490/3307948162_2078022322.jpg" alt="hdr1_pregamma_1_mantiuk_contrast_mapping_0.3_saturation_factor_0.8" width="500" height="333" /></a></p>
<p>Looks ok, although not amazing.</p>
<p>So off to google to find some tutorials. There are quite a few around but this one caught my eye: <a href="http://garmahis.com/tutorials/hdr-tutorial-free-software/">HDR tutorial: how to create HDR photos with free Qtpfsgui and GIMP</a></p>
<p>This tutorial recommends using 2 different algorithms and combining the output using <a title="Victoria Quays - Attempt 2 by cornet, on Flickr" href="http://www.flickr.com/photos/cornet/3308125546/"><img src="http://farm4.static.flickr.com/3492/3308125546_ec0b1d641f.jpg" alt="Victoria Quays - Attempt 2" width="500" height="333" /></a></p>
<p>Colours are a bit more vivid in that shot. Still some experimentation to be done but <a href="http://qtpfsgui.sourceforge.net/">qtpfsgui</a> definitely shows some potential. I just wish the software had a better name <img src='http://cowjuice.org/blog/wp-includes/images/smilies/icon_wink.gif' alt=';)' class='wp-smiley' /> </p>
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