Gray cards : the 12% - 18% controversy

Started Apr 13, 2013 | Questions thread
Roland Karlsson Forum Pro • Posts: 26,522
Re: The grey card is a reference for print making

xpatUSA wrote:

I think we all know that raw data from any camera will not be coded in RGB, but thank you for the reminder ;-). I was never talking about raw data with reference to gray card shots and the resulting histogram therefrom.

Hmmmm ... it fees like we are talking by each other. What histograms? On the camera LCD after taking the image? In SPP? In e.g. Photoshop after converting to TIFF/JPEG? Which one are you referring to?

Yes, when I said earlier "converted without further processing", I really did mean to imply a neutral image, converted from raw and properly profiled. Or even a neutral jpeg out of a camera, if there is truly such a thing . . .

So ... I assume you meant the histogram for the SPP converted image. Or?

How about those LR histograms? . . . I just learnt yesterday that the working area in LR4 is something called "Melissa RGB" which is kind of like Kodak ROMM, aka ProPhoto, but with a D65 white point and (wierd) the sRGB gamma curve! Good old Adobe . . gotta luv 'em.

Don't have LR. I know what ProPhoto is, but I have never heard of Melissa RGB before. Did a brief googling. Yet another color space! Yipie! Seems to be a wide gamut gamma 2.2 color space.

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