2/25/2023 0 Comments A pdf deskew gimpRemoval of the half-tone dots seen in e.g. Geeqie (Linux) - previously known as gqview, useful for flipping through a series of images to check they are all in the right order, right way up etc.Scan Tailor is a very useful cross-platform tool, with a GUI interface, for deskewing, splitting, resizing, and adding/removing margins. Losslessly optimises JPEG images to reduce file size without changing image contents. jpegoptim (MacOS X, Linux, Windows) - Commandline tool.GUIprep can be configured to call Pngcrush as part of its pre-processing. Optimises PNG image compression to produce the smallest possible files for upload to DP. Pngcrush (MacOS X, Linux, Windows) - Commandline tool.Released for Linux, but could perhaps be run on other OSs with the appropriate compiler?" - For example, it also runs on Mac OS X and cygwin. Additionally, unpaper might be useful to enhance the quality of scanned pages before performing optical character recognition (OCR). The main purpose is to make scanned book pages better readable on screen after conversion to PDF. From the project's website: "unpaper is a post-processing tool for scanned sheets of paper, especially for book pages that have been scanned from previously created photocopies. Imagemagick (OSX, Windows, Linux) - commandline tool for resizing, rotation, applying thresholds, converting formats etc.
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