Google| Subject | Re: Is RGB to Lab lossy? - was(Re: Lenses and sharpening) |
| From | Savageduck |
| Date | 10/09/2014 18:26 (10/09/2014 09:26) |
| Message-ID | <2014100909262032199-savageduck1@REMOVESPAMmecom> |
| Client | |
| Newsgroups | rec.photo.digital |
| Follows | PeterN |
| Followups | Savageduck (4m) PeterN (1h & 23m) > Savageduck |
On 2014-10-09 15:47:57 +0000, PeterN <peter@verizon.net>said:
PeterNYet
On 10/8/2014 10:51 PM, Ron C wrote:Ron CPeterN
On 10/7/2014 3:52 PM, PeterN wrote:Ron CMartin BrownPeterN
< ....large snip.... >
Thanks, What you and Dr. Brown say makes sense. From a photo standpoint I will continue to keep LAB in my workflow, while trying not to overdue it.
There is an interesting discussion on using LAB to control color saturation at:
<http://www.dgrin.com/showthread.php?t308>
though it may have been posted before.
I'd tend to think of Lab mode as just another tool to work with as needed. The more tools the better, but do take the time to learn the range and limitations of the stuff in your tool box.
Anyway, sticking my neck out (for what little it may be worth), I pulled the squirrel photo out from the above "..dgrin.com/.. " thread and had a go with it in Lab space.
I've posted the before and my after in my photobucket if anyone may care. < http://s1351.photobucket.com/user/Editorial_Minstrel/library/Lab%20tests > < http://tinyurl.com/kyrt87u >
I'm guessing similar results could be had in RGB space.
=>>Later... Ron C
LAB is indeed another tool that can be useful. Here is an example of saturation differences.
<http://blog.epicedits.com/2007/12/20/photoshop-technique-lab-saturation-adjustments/>
whenThat is a 7+ year old article, much has changed both with photoshop, ACR and some very useful plug-ins which do a better job than resorting to LAB. So, regardless of whether a LAB in & out cycle is lossy or not, the question remains; for other than some arcane specialized purpose, why bother with LAB?
There are very good plug-ins from NIK, OnOne, AlienSkin, Intensify Pro (for Mac users only), and even the dreaded Topaz.
For the saturation adjustment try exploring NIK Viveza 2.
I am not even going to address sharpening in LAB given the current proficiency of the tools we have available without LAB, and the obvious polarizing stance of folks in this room.
As for dealing with the haze issue look no further than some of the tools available in NIK Color Efex Pro 4, or even better embrace the haze and make if a part of the image.
There isn't much point in discussing the capabilities of Intensify Pro here for our Windows users, other than to say it makes an interesting alternative for the Mac user to some of the other more costly plug-ins for $24.99.
-- Regards,
Savageduck
09/13/2014-
