All test resources must come from free public domain sources for
copyright reasons.

Test files do not necessarily produce perfect (or even good) OCR
results.

+---------------------+--------------------------------------------------------------------------------+
| File                | Source                                                                         |
+=====================+================================================================================+
| graph.pdf           | Wikimedia                                                                      |
+---------------------+--------------------------------------------------------------------------------+
| c02-22.pdf          | Project Gutenberg: https://www.gutenberg.org/files/76/76-h/images/c02-22.jpg   |
+---------------------+--------------------------------------------------------------------------------+
| LinnSequencer.jpg   | Wikimedia_                                                                     |
+---------------------+--------------------------------------------------------------------------------+
| congress.jpg        | http://www.baxleystamps.com/litho/meiji/courts_1871.jpg                        |
+---------------------+--------------------------------------------------------------------------------+
| blank.pdf           | Blank page from Adobe Illustrator CC 2015                                      |
+---------------------+--------------------------------------------------------------------------------+
| enormous.pdf        | PNG file saved to PDF using img2pdf                                            |
+---------------------+--------------------------------------------------------------------------------+
| invalid.pdf         | PDF file header followed by EOF marker; not valid                              |
+---------------------+--------------------------------------------------------------------------------+
| multipage.pdf       | several other files concatenated                                               |
+---------------------+--------------------------------------------------------------------------------+
| skew.pdf            | skewed version of c02-22.PDF                                                   |
+---------------------+--------------------------------------------------------------------------------+
| Test_Issue_28.pdf   | file with some syntax errors                                                   |
+---------------------+--------------------------------------------------------------------------------+
| missing_docinfo.pdf | file missing its DocumentInfo dictionary                                       |
+---------------------+--------------------------------------------------------------------------------+ 


.. _Wikimedia: https://upload.wikimedia.org/wikipedia/en/b/b7/LinnSequencer_hardware_MIDI_sequencer_brochure_page_2_300dpi.jpg