2006.12.05 18:44 "Re: [Tiff] Grayscale, or is it?", by Joris Van Damme

Bob,

In other words, if you need to display the TIFF greyscale on an sRGB monitor, then you're not applying any gamma correction to it, which is consistent LibTiff RGBA interface implementation, and very likely consistent with 95% of common practice out there?

Right. If you open a grayscale image and it looks fine on a computer display without additional gamma correction, then it must be similar to "sRGB" (which is in itself an attempt to describe what is "normal").

Do you agree that this most common practice violates the quoted remark from the spec?

It seems to, but the specification authors should not be faulted for not correctly predicting the future. :-)

Thanks, Bob, that's clear.

So it seems we have at least two people agree on the fact that greyscale is R=G=B, assuming RGB is sRGB, is the common practice, though it seems to violate a small remark in the spec, and that people would generally speaking do well to follow this common practice.

So, that's option 1) in my original post...

Best regards,

Joris Van Damme
info@awaresystems.be
http://www.awaresystems.be/
Download your free TIFF tag viewer for windows here:
http://www.awaresystems.be/imaging/tiff/astifftagviewer.html