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GIMP Bible by Robert Shimonski, Jason van Gumster

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Chapter 13. Implementing Blur, Enhancement, and Distortion Filters

IN THIS CHAPTER

  • Introducing GIMP's filters

  • Increasing depth and focus by – ironically – using blur

  • Using automated ways of cleaning up images

  • Deforming your images and actually making them look better

This chapter marks the beginning of an entire section of this book devoted to GIMP's extensive and impressive list of filters. Simply put, a filter is a small program that takes image data as input, performs one or more processing steps on that image data, and returns a modified version to you. The filter may require additional input from you in the form of settings and parameters to help customize and control those processing steps. In the case of most GIMP filters, the active layer (or your current selected pixels in that layer) serves as the image data that's fed to the filter.

This chapter covers some of the most commonly used filters in image editing. The Blur filters are designed to obscure details, but in using them you can focus the viewer's attention on more important parts of your images. In GIMP's array of Enhance filters, you're given tools that allow you to accentuate specific details or all details in your images. The filters in the Distorts submenu can take your image data and dramatically transform it into something that only hints at what your original image was. It's really quite exciting.

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