PDF Filter

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Overview

The PDF Filter is an Okapi component that implements the IFilter interface for PDF files.

Warning: This is a filter does not merge back into PDF format. instead it produces a plain text file output upon merging.


Processing Details

Input Encoding

PDF files are binary files and do not have a specific encoding. Okapi extracts all text from the PDF as a Java string and forces the encoding to be "UTF-16". Any encoding selected in tools like Rainbow will be ignored.

Segmentation

TextUnits are created following the default rules of the Plain Text filter. That is, any text followed by a newline will create a new TextUnit or paragraph.

Parameters

This filter has no parameters.

Limitations

  • This filter merges back in plain text format, not PDF.