Subject | Re: Lenses and sharpening |
From | Sandman |
Date | 09/20/2014 13:50 (09/20/2014 13:50) |
Message-ID | <slrnm1qr09.inb.mr@irc.sandman.net> |
Client | |
Newsgroups | rec.photo.digital |
Follows | Eric Stevens |
SandmanEric Stevens
You may pretend to be the spokesperson for Floyd all you want, Eric, and you may also insist on not noving what the term means as well - but image processing in Lightrom is 100% reversible at all times. This doesn't change just because you guys don't know any better.
I am not a spokesman for Floyd.
I have three years of university study of thermodynamics. It's 50 years ago now but I still know a little about this subject.You seemingly bave zero knowledge about image processing, and probably forgot most about it as well. :)
I can't be bothered looking up the details of your qualifications but I do know that a fine arts degree or diploma does not equip you enter a discussion of this subject.Haha, says the guy that thinks thermodynamics is related to image processing. That's adorable.
He did.Eric StevensFor example, saving an image as a JPG is not fully reversible in that you cannot reconstruct the exact original image from the JPG. There will be differences which can be corrected only if you bring in additional (pixel) information from outside the reconstructed image.Image 1 --->JPG --->Image 2 is not a fully reversible process. Image 1 cannot = Image 2.Sandman
Yes, we know Floyd was incorrect when he claimed that JPG compression was reversible.
But he didn't.
Haha!SandmanEric StevensSandmannospam
not only do i realize it but that's what i've been saying all along.you are *so* confused.Eric Stevens
And I have pointed out that you cannot reverse a change which has not actually been made. Even if it is reversible, you can't reverse something before you have done it.
No one has talked about reversing things you haven't done. We've been discussing Lightroom, where you can reverse everything you have done.
I don't want to continue to wander down yet another of nospam's side paths, but I was pointing out that changing an edit before a file is exported isn't actually changing anything in the final exported image, so you can't claim to have reversed anything in the image.
Which would only be a problem if that was the only copy of the image. Since it isn't, the end result is fully reversible. This is how modern photography works.You just haven't kept up with all this new-fangled technology thingies.Eric Stevens
And you haven't even put your foot on the bottom rung of the ladder.