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Photoshop CS Add Ons From Al Ward.
Monday November 15, 2004
by Al Ward

Al Ward has provided Imaging Revue with Phtoshop CS actions to download. These files are in a zip format and can be opened using both Stuffit and WinZip. For more information about Al please visit www.actionfx.com. Please stay tuned for a future discount for IR members to Al's site.

Profile FAQ And Instruction Manual
Sunday October 31, 2004
by IR Staff

We have compiled a new and up to date Profile FAQ. If you are ordering a printer profile, please make sure that you read the information contained here. Many of the questions you may have will be answered here. These articles are in PDF format.

Patching and Healing with Martin Evening.
Friday October 22, 2004
by Martin Evening

The third in a series of tutorials, Martin discusses the Healing Brush and Patch Tool. Martin's video tutorial accompanies this PDF and can be uncompressed using WinZip or the Stuffit expander. Published with permission of Focal Press Publishers, a division of Elsevier. Copyright 2004. For more information about this book and other Focal Press titles, please visit www.focalpress.com.

Nikon Scanning Workflow
Friday October 15, 2004
by Scott Martin

Scott Martin has deciphered Nikon's workflow technology and brings us this quick guide to achieving great scans. For more information on Scott and his work, please visit www.on-sight.com.

Image Adjustments with Martin Evening.
Friday October 8, 2004
by Martin Evening

The second in a series of tutorials, Martin discusses the Photo Filter and Color Temperature. Martin's video tutorial accompanies this PDF and can be uncompressed using WinZip or the Stuffit expander. Published with permission of Focal Press Publishers, a division of Elsevier. Copyright 2004. For more information about this book and other Focal Press titles, please visit www.focalpress.com.

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Digital Capture > Image Processing & Workflow > Conversion Sequence

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AuthorSubject: Conversion Sequence   [Go to Bottom of Page]
Herbert Gibson
Posted on Tue Jul 22, 2003 2:42 PM

Michael Reichmann (Luminous Landscape) has started a discussion about raw capture and in particular, the fact that lower values are described by fewer levels than higher ones. It might be said that the chip output is not visually linear.

After conversion, can we agree that the numbers ARE visually linear? (Role of workspace gamma?).

Michael; and Thomas And Ian?) argue the benefits of full exposure. Plop the histogram up against the R H edge. Seems totally logical.

However, the mathematical goings-on during conversion remain a dark area. This is presumably more significant with Capture One and Camera Raw which carry out additional processing compared to Canon based conversions.

Now, perhaps understandably given the lack of information, there are arguments that:

1) There is a downside to max (over?) exposure. Everything is fine-tuned for a more average exposure. With 'expose right' you don't get optimum gray balance, etc AND you have to re-adjust downwards to the proper point. It would, the argument goes, be better to expose normally, take advantage of the optimum software development region AND not have to shift the data twice.

2) There is no advantage 'exposing right' if your picture has significant shadow regions. If you shift the Levels Black Point during conversion to recover dark shadows, you are back to square one - restricted number of levels for the shadows.

Without knowing what happens during conversion, it is difficult to judge the legitimacy of these arguments.


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