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The Book of GIMP by Karine Delvare, Olivier Lecarme

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Chapter 7. Image Preprocessing

Preprocessing is most commonly used in scientific imaging to remove noise and distortions from an image prior to analyzing its meaningful content. Scientists preprocess satellite images, for example, to remove interference like atmospheric debris and clouds before using the images for research. Even if you’re not a scientist, you may want to preprocess your images, since these techniques can help you correct distortions, improve color balance, and enhance visibility.

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