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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.
Interesting question, but I suspect that there isn't such a convincing use case for this as forged currency is for tracking color printers. Does government use paper as a security boundary, and if that's the issue, wouldn't it suffice to have the scanners in the relevant offices log everything they are scanning (which I think they already do)?
Also, almost all such watermarks would be easily destroyed by bitonalization and despeckling, which is usually done anyway to reduce the file size (e.g. it's part of the default operation of https://github.com/4lex4/scantailor-advanced ). Arguably the same is true for yellow dots if one is leaking scanned printouts, but identifying leakers is not the main purpose of the dots...
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https://np.reddit.com/r/opensource/comments/ou4y5h/is_there_an_open_source_program_to_reduce_the/h72nl4g/