How do I transform White Point coordinates into Kelvins?

General Color & Graphics Monitor Calibration & Soft Proofing
1

Hi, I finally figured out how to measure room ambient light with the new i1Profiler software. I get the Luminosity of the work area and I also get the color temperature of the light. The challenge is that it’s measures in ‘White Point Coordinate’ and not in Kelvin.

Does anyone have any resource or calculator that I can use (web based or on a mac) to transform these coordinates into color temperature measure in Kelvins?

For example: x: 0.341 and y: 0.368. What’s the Kelvin equivalent white point?

Thanks SO much. m.

2

Hello Mr. Martin,

The correlate color temperature is 5195 kelvin.

ColorConverter works on iPad. It is not free, but well worth the small investment. You can get more information here:

  [itunes.apple.com/us/app/colorco ... 31312?mt=8](https://itunes.apple.com/us/app/colorconverter/id550331312?mt=8)

Please contact me with any questions.

Regards,

Mauro Boscarol

3

There’s also Bruce Lindbloom’s site. Not as convenient as an iPad app, but it’s an option.
brucelindbloom.com/
Click the “Calc” button and choose the CIE Color Calculator.

I pluggedin your coordinates and got 5194.7 Kelvin

So Martin, tell us how you get the luminosity out of i1Profiler?

4

Sorry for my delay in answering. The notification somehow went into my junk email. I’ll buy the iPad app and for sure bookmark the website.