Excel spreadsheet and code snippets available here: http://www.cis.rit.edu/mcsl/online/cie.php Jeff On Jan 17, 2012, at 3:03 PM, colorsync-users-request@lists.apple.com wrote:

Date: Tue, 17 Jan 2012 18:50:00 +0000 From: Martin Orpen <martin@idea-digital.com> Subject: Re: DeltaE Calculator To: "'colorsync-users?lists.apple.com' List" <colorsync-users@lists.apple.com> Message-ID: <9FB00D30-E921-4DD2-8650-A687780986E7@idea-digital.com> Content-Type: text/plain; charset=us-ascii

On 17 Jan 2012, at 18:25, A Sanna wrote:

...

Is there a calculator or utility out there that could generate the DeltaE between two entered Lab values?

Applescript? Something along the lines of:

set {L1, a1, b1} to {47.79, 73.73, -2.93} set {L2, a2, b2} to {48.41, 75.54, -3.88}

set dE to (((L2 - L1) ^ 2) + ((a2 - a1) ^ 2) + ((b2 - b1) ^ 2)) ^ 0.5 set dE to (dE * 100 as integer) / 100

--> 2.14

It'd only take a couple of minutes to add an interface in Xcode -- although using a spreadsheet app might be even easier.

-- Martin Orpen Idea Digital Imaging Ltd

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