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Old Mar 18, 2011, 7:44 PM   #1
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New to photography.. wondered can I make use of this High resolution processing malarky.. is it HRD?
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Old Mar 18, 2011, 8:51 PM   #2
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HDR?

That's High Dynamic Range. Under normal circumstances, in a scene that contains a broad range of brightnesses, some portions of a photograph will be underexposed and some portions will be overexposed. HDR is the process of taking multiple photographs, each with different portions of the image properly exposed, and putting all the properly exposed portions together into a single image.

This is not unlike what your eye does as you're examining a scene. If you look at an object in the shadow of a tree, your eye will adjust to the shadow so you can make out the detail of the object. But when you look at an object that's in bright sunlight, your eye will adjust to the brightness as well. Your eye and your brain do all that automatically, but a camera averages out the brightness of a scene in order to get most of the image properly exposed. HDR is an attempt to mimic what your brain does without you even thinking about it.

Is that what you were referring to?
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Old Mar 18, 2011, 8:57 PM   #3
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That was really well explained, which is great for a novice like me. I saw a site earlier which advertised using it.. I have a Powershot S% IS.. not even used it yet only got it today( first camera).. this site seems really professional, as was your advice. I am a grateful newcomer. P
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Old Mar 18, 2011, 8:59 PM   #4
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So I guess if I want to use it I need to download a processing programme.. or can I use photoshop.. or Canons' Zoombrowser?
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Old Mar 18, 2011, 9:18 PM   #5
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There are several programs for HDR. Some make use of multiple exposures at different settings, and combine them, for 'true' HDR. Some use a combination of tone mapping, noise reduction, and local contrast enhancement to provide a similar effect from a single exposure. One of these is being developed by a member of the forums here, Martin Sykes. His program is available at http://www.autohdr.co.uk/autohdrhelp.html
Have fun.

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