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scantailor-advanced
ScanTailor Advanced is the version that merges the features of the ScanTailor Featured and ScanTailor Enhanced versions, brings new ones and fixes.
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
If you're looking to improve the visual quality of the scans, try ScanTailor. If you're looking to OCR text (make the images into "real" text as you put it, so that it's searchable), you can try a number of programs. My personal favorite is Not Another PDF Scanner 2. It's made for you to scan into the program, but you can just as easily use the import button to use the PDF you've already made.
Related posts
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Looking for freeware to scan multiple photos and autocrop. Straightening would be a plus
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Whats the best software to split multiple scanned-at-once photos apart?
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Program for book digitisation/scanning?
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Request Help-How to batch split two pages (misscanned onto 1 page) into two pdf pages, one pdf page for each page image? Any suggestions on other software products to assist?
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https://np.reddit.com/r/opensource/comments/ou4y5h/is_there_an_open_source_program_to_reduce_the/h72nl4g/