RGB vs. CMY Color Mixing

[JD]

Originally Posted by gafftaper

LED's can produce colors with much more color saturation (deeper, richer, darker) than incandescents/discharge lamps with CMY filters... or just plain old gel. On the flip side, LED's have a harder time creating as good of a white light and they just aren't as bright.

This has to do with another, almost unwanted characteristic-
LEDs (with exception to white) are monochromic.
A gelled "Primary Red" contains many color frequencies, where as a Primary Red led only contains one. The problem is, our eyes each see red at a slightly different center frequency. (Variance between people) The gelled primary red has enough slop to it that we all consider it red. The LED may be as red as it gets to some people, and slightly off to others. The "white" caused by an RGB led fixture contains only three frequencies of light! They effectively do not have a "color temperature." (White LEDs get their color temperature by the phosphorous they use to convert their UV output to visible light.) This may not look correct to some people. (Maybe everyone!)

Diachronic filters used in subtractive mixing are basically tight band-pass filters. There is still some output on either side of their center frequencies. Unfortunately, CMY subtraction is most often done using a discharge lamp, which itself has a lot of peaks and valleys in its spectral output.

[derekleffew]

Originally Posted by JD

...Diachronic filters used in subtractive mixing...

Dichroic. "Diachronic" refers to language. See kids, no one is immune or above reproach; see this thread: http://www.controlbooth.com/forums/q...ish-class.html. JD used the wrong word once and was never corrected, so now he is wrong every time. <lecture /off>

[JD]

Originally Posted by derekleffew

Dichroic. "Diachronic" refers to language. See kids, no one is immune or above reproach; see this thread: http://www.controlbooth.com/forums/q...ish-class.html. JD used the wrong word once and was never corrected, so now he is wrong every time. <lecture /off>

Ah, go tell Bill Gates! (I don't care if he retired!) I pre-type my posts into Word, and it auto-corrects it to Diachronic every time!

[MNicolai]

Originally Posted by JD

Ah, go tell Bill Gates! (I don't care if he retired!) I pre-type my posts into Word, and it auto-corrects it to Diachronic every time!

You should add dichroic to the dictionary then. Or get Firefox. It does spell-check, but not auto-correct.

[Serendipity]

Originally Posted by MNicolai

You should add dichroic to the dictionary then. Or get Firefox. It does spell-check, but not auto-correct.

If you're a mac-ie, Safari does too. I think spell check is much more useful than auto-correct.

[lieperjp]

Originally Posted by Serendipity

If you're a mac-ie, Safari does too. I think spell check is much more useful than auto-correct.

I thought Safari did it too, but I wasn't sure so I didn't write it. You can get Safari for Windows, too; I like Firefox because it's open source and the bookmarks feature works better than on Safari.