1. What model does cataloguing software use ? These programs use a library model for their structure.
The files are stored in a single folder, in multiple folders, or even across multiple hard drives.
Software has collected all the metadata about the photos in a central location—and because the software can create new metadata as the user deems necessary—the catalog becomes a versatile place to know about entire collections, and to control and manage the photos.
It’s natural fit for cataloging software and non-destructive imaging to grow together, storing the software in programs like Apple Aperture and Photoshop Lightroom.
It never uses the database as a place to save information. File browsers merely cache information in their databases. That is, they stash it there for quick access but always look to the original source file to see if the cache is up to date and correct.
With cataloging software the information about the photo is assumed to be most accurate in the catalog, rather than what may be residing in the file itself. Of course, much of the information came from the file originally and can be pushed back into the file when desired.
When you make a rendering change to an image with catalog-based PIE software, you are changing the information in the catalog and in the preview that gets cached, but you are not necessarily touching the original file.
Yes 9. How does a cataloguing system make changes to an image available to other programs ? If your library is made up of DNG files, you can push an embedded preview back into the DNG file. This semipermanent fixed rendering can make the adjustments visible to any program and remains embedded in the source file itself for easy management.
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Sunday, 11 September 2011
Non-Destructive Image Editing - 3
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