Re: unsharp

[David Spellman <david@photopro.com>]

    Thanks for this. There are a couple of areas where this Blatner and
Fraser book might actually be incorrect, so I'll add this to the list of
areas I want to check further on. Meanwhile, I'll assume they're correct that
there is loss. I wonder what information is lost, and how much?

    david

"Rafe B." wrote:

> At 05:09 PM 6/14/99 -0700, you wrote:
> >    Er... as I understand it, moving from RGB to Lab and back involves no
> losses
> >in the image. It's not quite true to say that "any change of color space
> >introduces some losses in the image."
> >
> >    david
> >
>
> From: P. 254 of Blatner & Fraser (Real World Photoshop 5)
>
> "There is a general impression in the Photoshop
> community that you can switch between RGB and Lab
> without losing significant amounts of image information...
>
> ... we were surprised to find that conversion between
> RGB and Lab is far from lossless."
>
> rafe b.
>
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