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Compressing PDF: Reducing the file size is called compression.
Reducing the size of data files is commonly referred to as data compression. In terms of data transmission, compressing PDF is called source encoding; The encoding performed at the data source before data storage or transmission. The connection between machine learning and compression is very close; They are all systems that can predict the probability of a sequence being in the previous position and consider the entire history to generate optimal data for resizing. For prediction, more advanced compressors can be used.