RAW dynamic range extraction - Revision history

Erik Krause: marked as out of date

2008-09-21T21:41:53Z

marked as out of date

2008-04-07T19:17:25Z

‎Intro: clarified intention

2007-03-21T18:09:04Z

1 revision(s)

2007-03-21T18:07:00Z

linkify

2007-02-07T21:42:21Z

linkify

2007-01-18T22:04:51Z

link to future sharpening page

2006-08-18T16:06:29Z

linkified

2006-08-16T20:57:42Z

remove incomplete Category:Software

2006-07-13T20:33:03Z

5 revision(s)

2006-07-13T19:57:52Z

1 revision(s)

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 According to dave coffin (author of dcraw) most other RAW converters try to reconstruct the clipped channel from the other channels. This is why f.e. Adobe Camera RAW sometimes seems to deliver more dynamic range than dcraw in 16 bit mode does.
 [[Category:Tutorial:Specialised]]
 [[Category:Software:Platform:Windows]][[Category:Software:Platform:Mac OS X]]

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 === Intro ===
-This is a small tutorial on how to extract the full [[dynamic range]] of a RAW camera file into a single 16 bit per channel document using Adobe camera RAW converter of photoshop CS2. This workflow might be possible with other RAW converters, too.
+This is a small tutorial on how to determine settings to extract the full [[dynamic range]] of a RAW camera file into a single 16 bit per channel document using Adobe camera RAW converter of photoshop CS2. This workflow might be possible with other RAW converters, too.
 For a general RAW workflow please see [[Working with RAW files in CS2]]

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 <small>--[[User:Erik Krause|Erik Krause]] 11:44, 11 Dec 2005 (EST)</small>
-[[Category:Tutorial]][[Category:Tutorial:Specialised]]
+[[Category:Tutorial:Specialised]]
 [[Category:Software:Platform:Windows]][[Category:Software:Platform:Mac OS X]]

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 What to do now with these files? You can use a simple s-shaped curve to simulate analog film characteristics, you can use photoshop "Shadows/Highlights" to reveal some of the shadows details. You can use my [[Contrast Masking Actions]] to have a more [[halo]] free result or you can use one of the [[HDR compression]] plugins.
-For the latter there are some preparations necessary: Either convert the image to 32 Bit per channel by simply choosing from the menu or convert to a linear gamma color space. How to create a linear gamma color space can be found in the [[Dcraw#16_bit_files_with_Photoshop|dcraw article]].
+For the latter there are some preparations necessary: Either convert the image to 32 Bit per channel by simply choosing from the menu or convert to a linear [[gamma]] color space. How to create a linear gamma color space can be found in the [[Dcraw#16_bit_files_with_Photoshop|dcraw article]].
 === Remark ===

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 On ''Details'' tab:
-* ''Sharpness'' Sharpening might introduce some clipped highlight pixels since it increases contrast along edges. Better to sharpen the result image after contrast adjustment.
+* ''Sharpness'' [[Sharpening]] might introduce some clipped highlight pixels since it increases contrast along edges. Better to sharpen the result image after contrast adjustment.
 * ''Luminance Smoothing'' and ''Color Noise Reduction'' try to reduce noise. They tend to eliminate single clipped pixels but don't impact over all dynamic range.

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 === Preparation ===
-First we need an example with high dynamic range to find suitable parameters. Since it is very hard to shoot a controled high dynamic range scene in one image it is advisable to use an exposure bracketed series for this purpose.
+First we need an example with high dynamic range to find suitable parameters. Since it is very hard to shoot a controlled high dynamic range scene in one image it is advisable to use an exposure [[Bracketing|bracketed]] series for this purpose.
 I've chosen a setup like the one proposed by Ben Kreunen on [http://www.path.unimelb.edu.au/~bernardk/tutorials/360/technical/hdri/] with a white, a grey and a black patch. This setup can be used to determine dynamic range of the camera, too. However, the use of a grey wedge would be better for our purpose.

← Older revision		Revision as of 20:57, 16 August 2006
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	[[Category:Tutorial]][[Category:Tutorial:Specialised]]		[[Category:Tutorial]][[Category:Tutorial:Specialised]]
−	~~[[Category:Software]]~~[[Category:Software:Platform:Windows]][[Category:Software:Platform:Mac OS X]]	+	[[Category:Software:Platform:Windows]][[Category:Software:Platform:Mac OS X]]

← Older revision	Revision as of 20:33, 13 July 2006
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