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4. Working with RAW Images

Chapter 4: Working with RAW Images

image

If you are lucky enough to own a digital SLR or a high-end compact camera, you will most likely have the ability to capture your images in RAW format. This differs from the usual method of saving images to the memory card: unlike with the JPEG format, there is no processing performed first – the image data is stored exactly as the camera sees it when you press the shutter button.

RAW has two distinct advantages over its JPEG counterpart. First there is no loss of quality between the camera and the computer, which you get in varying degrees with the compressed JPEG format. Although this might not be noticeable to begin with, the quality of preprocessed images can deteriorate slightly when edited. The second benefit to using RAW is any changes made to the image in the postprocessing stage are nondestructive, including color and contrast enhancements as well as straightening and cropping. This is because the changes are not applied directly to the image initially; they are instead stored as a list of instructions in a separate file. After saving changes to the RAW image, you can go back and alter or revert them whenev....digital negatives


  

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