Non Destructive Editing Questions

1. Define ‘Non Destructive Imaging’

In general, NDI refers to imaging processes where the source image may be adjusted in a way that leaves the original data intact. There are several different ways to accomplish 

this type of adjustment, each with its own uses, strengths, and weaknesses

2. List four challenges introduced by digital photography :
   
   
   a. The creation of a vast number of photos
   b. The need to apply identical adjustments to many photos in one operation
   c. The need to interpret a single source image in multiple ways (black and white, and color, for instance)
3. d. The desire to take advantage of rapidly evolving imaging technology to reinterpret images with more capable software in the future
   
   
4. What is meant by a ‘Derivative File’ ?
    A derivative file is a copy of a source image that is saved out to a separate file. A derivative file may or may not have had explicit rendering or processing changes baked into it, relative to its source image

4. What are two problems with using ‘Save As …’ to create derivative files ?
5. 
   
6. a. While this approach enabled the user to save both the original and the adjusted version, it came 
7. at a high price. The creation of multiple variations of a photo could bring great confusion.
8.  Often 
10. users would append a term to the file name to indicate its adjustment, but that might be hard 
12. to sort out later. Trying to sort out the difference between Picture1_final3_Sharpen.TIFF and 
14. Picture1_final3_realfinal.TIFF would often not be worth the effort.
b. Use of derivative files to enable NDI also brings a high price tag in terms of storage. Since the entire file needs to be resaved, even small changes require resources to duplicate and archive the entire file. So while use of derivatives enables NDI, it does not do it very efficiently.
15. What is ‘Self Referenced Non Destructive Imaging’ ?

In Photoshop 3, layers were introduced and it became possible to save multiple versions of the same image within a single file. This helped with the management difficulties associated with derivative file workflow but did nothing to address the storage needs. In Photoshop 4, adjustment layers were introduced, and it became possible to wrap up the source image with a set of instructions (or many sets of instructions) for rendering the photo. Let’s call this 

self-referenced NDI

6. List two advantages of Self Referenced NDI over the use of Derivative Files?
7. 
   
   a. Using self-referencing files offers some significant advantages over derivative file workflow. Since
the instructions to adjust the image take up much less space than creating an additional file, it’s much more economical in terms of storage. And since you can name adjustment layers for an effect—as well as clearly see what the adjustment does—it becomes much easier to sort out what has been done to an image
8. 
   
9. b. 
Using adjustment layers also offers you the ability to create a separate interpretation of the file— a black-and-white version, for instance—while still making use of some of the work done for other versions, such as retouching
10. Define ‘Parametric Image Editing’?
    
    

    The editing of images by creating instructions or parameters parametric image 
    editing (PIE). 

8. What is the difference between a Live Rendering and a Fixed Rendering?
    
    A live rendering is a view of the images that only exists when the image is loaded into PIE Software
   
   

   
   

   A fixed rendering is a rendering of the image that is saved into pixel values or printed on paper. In a color-managed workflow, it is not dependent on any particular rendering 
engine to display correctly

9. List three advantages of NDI :-
   
   
11. a. One of the great advantages of catalog-based NDI software is the ability to generate many kinds 
12. of output from the same source image. Because all the information about the photos can be gathered in a single environment and can be integrated with the ability to control them, the user has 
13. unparalleled capacity to group and make use of photos on a collection-wide basis.
    
15. b. There can be many different ways to organize a collection of photographs. It might be useful to
16. group photos according to subject matter, client, usage, or quality rating. And once these groupings are created, one might wish to output a subcollection to print, a slide show, a web gallery, 
17. or another derivative product.
    
19. c. Catalog-based PIE software that is integrated with a rendering engine can create these derivative 
20. products even more efficiently than non-rendering cataloging software. It’s frequently desirable 
21. to do a bit of touch-up to the image files on the way to output. Having that ability within the 
22. same program that groups and sends files to output lets the user integrate picture selection and 
23. image editing in a streamlined way