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Discussion Starter · #1 ·
Can you use a digital camera and windows paint to calibrate to D65.

If I take a photo using daylight color temperature of a full white, or full 80%white, etc... screen, then use paint (eyedrop-sample, color, edit color, define custom colors) it tells me the RGB values. Then I could use a online RGB to D65 color temperature caluclator to give degrees K.


Would this be incredibly inaccurate? Better than calibrating color temp by eye or just as bad?


Also there are online contrast calculators which use the rgb values of full black and white screens along with information on Fstop and shutter speed to calculate on/off contrast ratio. Any thoughts on these.
 

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Greetings


What's with the CR calculator? Any calculator will do.


Measure how bright black is ...


Measure how bright white is ...


Divide the two numbers and voila, CR number.


Seems like you need a light meter to do this. Calculator part is the simple part. $3 calculators will work here.


Regards
 

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Same question. Did not seem like it was answered yet.


My wife has one of those $1,300 canon digital cameras.


Using a high quality camera, is that good enough or better than just eye balling the color numbers?


Anyone try this before?
 

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Discussion Starter · #5 ·
Thanks for the link.
 
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