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Displaying similar documents to “Mathematical Formulae Recognition”

Web Interface and Collection for Mathematical Retrieval : WebMIaS and MREC

Líška, Martin, Sojka, Petr, Růžička, Michal, Mravec, Petr

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We demonstrate searching of mathematical expressions in technical digital libraries on a MREC collection of 439,423 real scientific documents with more than 158 million mathematical formulae. Our solution—the WebMIaS system—allows the retrieval of mathematical expressions written in TeX or MathML. TeX queries are converted on-the-fly into tree representations of Presentation MathML, which is used for indexing. WebMIaS allows complex queries composed of plain text and mathematical formulae,...

PDF Enhancements Tools for a Digital Library

Hatlapatka, Radim, Sojka, Petr

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This paper describes several innovative PDF document enhancements and tools that can be used when building a digital library. The main result presented in this paper is the PDF re-compression tool, developed using the jbig2enc encoder called pdfJbIm. This re-compression tool enables the size of the original bitonal PDFs to be, on average, downsized by one third. Some modifications to the jbig2enc encoder that increase the compression ratio even further are also described here. Together...