Re: "Grayscale" values for RGB images

Posted by Jeremy Winston-2 on Feb 19, 2007; 10:31pm
URL: http://imagej.273.s1.nabble.com/Grayscale-values-for-RGB-images-tp3700260p3700266.html

Michael Schmid wrote:
> there are different weightings of the RGB components depending
> on the color space used.
> The one used by ImageJ and many other image processing programs
> is that of European (PAL) TV (I don't know about US TV)
>   Y = 0.299 R + 0.587 G  + 0.114 B.

US TV uses the NTSC formula, which is the same as that for PAL.
Cf. http://www.answers.com/topic/yuv

NTSC = National Television System Committee.
Cf. http://www.ntsc-tv.com/

-Jeremy