Google| Subject | Re: Lenses and sharpening |
| From | Eric Stevens |
| Date | 2014-09-19 11:38 (2014-09-19 21:38) |
| Message-ID | <fntn1a581ourokq4njadqmm0crm60u711s@4ax.com> |
| Client | |
| Newsgroups | rec.photo.digital |
| Follows | Sandman |
| Followups | Sandman (2h & 26m) > Eric Stevens |
On 19 Sep 2014 07:01:13 GMT, Sandman <mr@sandman.net>wrote:
SandmanAt least until you export. Even then the riginal isnot touched: it's all done to a copy.
In article <kgcn1at99rogclf1uf77b4ugulal0snr3g@4ax.com>, Eric Stevens wrote:Sandmannospam
you're overanalyzing things again.the user makes a change to an image and quits the app. the next dayEric Stevens
All they have done up to this point is create a list of edits and view a simulacrum of their effect in screen. They haven't actually edited the image.
Yes, they have. All adjustments are being applied to a preview file as you do them. The original file is untouched at *all times*, at no point in time is it edited in any way.
Same with Photoshop and smart filters. All filters are added in the program and the original image data is kept intact at all times. If you "export" it from Photoshop in an image format that supports smart filters (such as TIFF), the reciever can reverse the process at any time, since the original image data is kept 100% intact.I don't know enough to comment on that.
You called it a preview file. Either way - I'm happy.SandmannospamEric Stevens
they resume working on the image and decide to reverse what they did the day before.
So they change the list of edits and againview the changed simulacrum which results.
No "simulacrum" involved, Eric. Stop using words you don't understand.
But it's not the same as the file you would - say - send to a printer.Eric StevensSandman
They haven't actually created any image to be changed at either point. That oonly happens once they execute the list of edits by exporting the image.
Incorrect. Do you really think that Lightroom will display thousands of edited images in grid view by applying all adjustments in realtime? Of course not. All adjustments are applied to preview files that are saved to disk. That's the image data you're looking at.
The *only* point Lightroom loads the original file and applies the rendering chain in RAM is when you're viewing an image in 100% zoom.Or when you export the image.
The exported file is an edited copy of the original file.SandmannospamEric Stevens
with a non-destructive workflow, they can do that. without a non-destructive workflow, the changes cannot be reversed.
Once they have executed the list of edits by exporting a file the changes can't generally be reversed either.
Sure they can, the original file is untouched and everything can be reversed.
You are proposing producing a differently edited copy of the original file. That's not reversing an edit: that's a new edit.
Except when you export.SandmanEric StevensEric Stevensnospam
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.
the change *has* been made, just not to the pixels themselves.
And to what has the change been made?
To the pixels. nospam is incorrect here. All LR adjustments are applied to a preview file and saved to disk.
I think we are all confused. --SandmannospamEric Stevens
as i said, you're confused.
I'm confused?
Very much so.
Regards,
Eric Stevens
2014-09-13-
