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Subject: Color targets for digital imaging

Color targets for digital imaging

From: John Cupitt <john.cupitt>
Date: Tuesday, August 26, 2003
Following on from Tim Vitale's excellent piece on colour targets, I
wanted to add another vote for the 24 patch Macbeth Color Checker.
As he says, it is a good choice for digital photography since the
colours are formed from mixtures of many (more than 15, I think)
inks, rather than through a photographic or lithographic process.
This gives the chart similar spectral properties to a painting.

You might be interested in some free software (for Windows, Mac or
*nix) we have written at the National Gallery which can be used to
calibrate images containing a Macbeth:


There's a page showing how to get calibrated colour here:


You want the second link down the page.

John Cupitt

                  Conservation DistList Instance 17:24
                 Distributed: Tuesday, August 26, 2003
                       Message Id: cdl-17-24-001
Received on Tuesday, 26 August, 2003

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