Recognize and extract texts in PDFs with Optical Character Recognition (OCR).In more technical terms, in this lesson you will learn to: You don’t have access to commercial software, such as Adobe Acrobat Professional or Abbyy FineReader.You want to examine your corpus by the means of Distant Reading and therefore need it to be in plain text format.You work with a large corpus and you do not want to touch each file individually (batch processing).Your files are in PDF file format or can be converted to this file format.You work with text-based sources and need to extract the content of the sources.If you meet one or more of the following criteria, this lesson will be instructive for you: However, PDF documents are only suitable for digital processing to a limited extent and must first be converted into plain text files. As a result, humanities scholars are increasingly exploring larger collections by means of Distant Reading and other algorithmic tools. Even more dramatic is the increase in the amount of data in digitally created sources such as those necessary for corporate and government reporting. Archives have begun to digitise entire collections and make them accessible via the Internet. The digitisation of these objects increases their accessibility and availability. This includes digital reproductions of physical sources such as books and photographs as well as digitally created documents.
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In most cases, the Portable Document Format (PDF) is used as an exchange format. Humanities scholars often work with text-based historical and contemporary sources. Use Topic Modelling to Analyze the Corpus.Combine Images and PDFs into a Single PDF.
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