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CHAPTER 15: Manipulating Your Images > Non-Destructive Imaging - Pg. 265

Chapter 15 Manipulating Your Images In this chapter I take a closer look at both types of imaging. I discuss the absolute basics of both Lightroom and Photoshop to give you some ideas of how powerful and useful these two programs can be. Of course the information offered in this chapter is only the tip of the iceberg compared to all the things you'll eventually need to know about both Photoshop and the non- destructive imaging program you choose to use. The tips and techniques offered in this chap- ter aim to whet your appetite for all the wonderful possibilities, and are not intended to be a full education on this topic. 265 Non-Destructive Imaging Non-destructive imaging software like Lightroom and Aperture was developed because most of the early digital camera makers kept their RAW files proprietary. They each produced a RAW file that could be opened and viewed by anyone, but only their software could be used to save the file again after changes were made. Independent software manufacturers like Adobe, Apple, and many others got around this limitation by creating a separate text file that records a detailed text and mathematical description of all the changes made to each image. This new file holds information for things like cropping, color correction, brightness, and color satura- tion, and these changes are only applied to the file when you save it to a different file format, such as JPEG or TIFF. This is basically equivalent to the "Save As" operation you use in many other programs. What was originally considered an extreme pain in the neck by software manufacturers turned out to be the greatest blessing we photographers have ever had. Today non-destructive