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[OM] Re: LightRoom Announcement

Subject: [OM] Re: LightRoom Announcement
From: Winsor Crosby <wincros@xxxxxxxxxxx>
Date: Tue, 30 Jan 2007 15:36:37 -0800
I almost wrote something similar, though not in the Moose exquisite  
detail. The main difference seems to be that non raw images get saved  
separately and completely in PS while these new processors save just  
the raw image and all the instructions. So with PS you may have  
several versions of an image, the raw file, its instructions and  
completely separate PSE, jpeg, tiff or other format images,  taking  
up space on your disk, but with Lightroom, Aperture, and Capture NX  
you have just one raw image saved and several sets of instructions  
that are applied anytime you want to view them. The xmp sidecar file  
in ACR just applies to the raw image while the saved instruction sets  
in the new processors apply to the finished images as well. When you  
open a saved tiff file or Jpg in LightRoom you are really opening the  
RAW image and applying all the instructions unlike what happens in  
PS. The advantage besides saving disk space is that you can open the  
jpeg or tiff and go back through the editing steps, but with PS you  
would have to go back to your saved RAW file and start over with your  
subsequent edits. At least that is the way I understand it.



Winsor
Long Beach, California, USA




On Jan 30, 2007, at 3:04 PM, Moose wrote:

> A minor rant:
>
> -That's how most, I suspect all, all RAW processors work. They don't
> alter the original RAW format file. Rather, they output the converted
> image into a more general purpose image format, like TIFF, JPEG,  
> PSD, etc.
>
> -What Lightroom does is to save the editing that you do as  
> instructions
> in a tiny file, so that whenever you again view the original,  
> untouched,
> RAW file, it looks the same as when you last left it and you may
> conveniently output it in that form in another file format. Or you may
> cancel the past processing and go back to square one. Again, this is
> nothing special and unique. RSE and ACRS (the RAW processor for PS)  
> also
> work this way, saving your changes in a small file, as well as being
> able to output other formats and/or send the image on to PS or another
> editor for further work.  I suspect other RAW processors work the  
> same.
>
> Lightroom indeed has some unique ideas about work flow for the pro
> dealing with hundreds or thousands of images from the same shoot, but
> the noise about non-destructive editing of RAW images is silly  
> puffery.
> The long term problem with "non-destructive" editing is that it  
> depends
> on a proprietary format file for the edit information, and thus on the
> long term availability of an application to (re)apply it to the RAW
> file. For serious keepers, you will still want to keep at least an
> edited version, and possibly also an unedited, but converted, original
> of the image, in a standard format.



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