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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.

Weekly Chatter:Monitor Recommendation
Wednesday October 6, 2004
by Imaging Revue Experts and Staff

Each and every week, Imaging Revue offers non-members a tantalizing taste of the information available in our forums. Make sure to check out the entire list. This thread contains some great information regarding the Sony Artisan and also touches on the LCD vs. CRT debate. If you are having some trouble with Artisan calibration, there are some helpful comments here. Jon Kulas

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Printers > Fine Art/Photographic Printing > Bill Atkinson's ICC Profiling Procedure

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AuthorSubject: Bill Atkinson's ICC Profiling Procedure   [Go to Bottom of Page]
Marco Passanisi
Posted on Tue Dec 16, 2003 1:41 PM

Hi all,
I came across this brief description of Bill's procedure to ICC profiling.
He describes what he does with a Lightjet but the same can be done with an Inkjet.

I don't quite get the whole idea behind it...
And more specifically don't get:

1- how the correction curves is creted?
2- shoud the correction curve then be applied to the image prior to sending the image to the printer?

Any comment and deeper explanation greatly appreciated.

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
First I print out a series of grayscale patches to the Fujix or
LightJet printer, and then use the Spectrolino to measure the resulting
densities on the developed photograph. This data is used to create a Photoshop curve
that empirically linearizes the device response to grayscale.
The curve doesn't look at all like a gamma curve or a dot-gain curve. It has lots of bumps and quirks that reflect the actual measured response of a complex interaction.
Then I prepare an RGB target which is initially 12 by 12 by 12 equal
steps in RGB. The linearization curve is applied to the target to
spread out the RGB numbers such that they more evenly and efficiently span and
sample the device-specific RGB colorspace.
Next this pre-compensated RGB data is sent to the printer, exposed by lasers, and the photograph developed.
The resulting 1,728 patches of photographic color are measured on the
SpectroScan, getting accurate CIE-Lab values for each patch.
Then I use ColorSavvy's SMPKit software to build an accurate ICC
printer pro-file from the CIE-Lab color measurements and the actual RGB
input data that was sent to the printer after linearization.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

Thanks.

Marco


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