High quality scanning vs. small file size

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This post will not talk about scanning only, but about the whole process of turning a sheet of paper, a magazine or a book into a high quality digital document of the smallest possible size. Nothing will be lost during the conversion as lossless compression will be used and OCR will be run on documents. A low quality scan is hard to read (impossible to run OCR). A high quality scan must preserve as much detail as possible, must have the correct page size (when printed at 100%, the resulting copy should be exactly the same size as the original), must load as quick as possible on low-end devices and shouldn't eat the whole drive space. Software processing of the raw image from scanner plays a very important role. Yet, if the image from scanner has a low resolution, further processing is useless and may have negative results. All software used in this tutorial is free (some apps are open-source). But let's start with the basics.

High quality scanning vs. small file size