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Digital BW, The Print

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Re: [Digital BW] Re: Digicam in BW mode, how to test

2002-02-08 by Todd Flashner

on 2/7/02 6:26 PM, crwaldvogel wrote:

> This is the same 
> as using the Photoshop conversion to Grayscale(Image>Mode>Grayscale)
> which converts your RGB image to Grayscale based on the following
> calculations(Approx):Red=43 Green=32 Blue=25

I think your overall message is right on.

 I'm curious though, where did you get these numbers? I've seen several
times that the PS formula is R=59 G=29 B=11. This was said to be Thomas
Knoll's (the original PS developer) formula for approximating Plus-x film
without filtration.

Todd

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