Google| Subject | Re: Is RGB to Lab lossy? - was(Re: Lenses and sharpening) |
| From | Alan Browne |
| Date | 10/06/2014 04:37 (10/05/2014 22:37) |
| Message-ID | <sbmdnfKAO4_mna_JnZ2dnUU7-LGdnZ2d@giganews.com> |
| Client | |
| Newsgroups | rec.photo.digital |
| Follows | PeterN |
| Followups | PeterN (10h & 41m) > Alan Browne Eric Stevens (18h & 49m) > Alan Browne |
On 2014.10.05, 20:55 , PeterN wrote:
PeterNNot at all. A non lossy process would have:
On 10/5/2014 6:57 PM, Alan Browne wrote:Alan BrownePeterN
On 2014.10.05, 14:42 , PeterN wrote:We went through all this some many months ago. I demonstrated clearly that the amount of 'loss' was negligible in practical terms.PeterNAlan Browne
I would use the terem "color change." anstead of loss.
Any change is a quality loss. Whether that is colour difference, tone, brightness, sharpness ... whatever, it's a loss.
Then you are using a different definition of quality.
RGB-A -->X-format -->RGB-B
with RGB-A identical to RGB-B
But - the fact is that with Lab
RGB-A -->Lab -->RGB-B
RGB-A =/= RGB-B, therefore there was quality loss.
-- << Among Broad Outlines, conception is far more pleasurable than carrying [the children] to fruition. Sadly, theres a high infant mortality rate among Broad Outlinesthey often fall prey to Nonstarters. >> "Bestiary of Intelligence Writing" - CIA
09/13/2014-
