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+CLASSIFIER_TESTER(1)
+====================
+
+NAME
+----
+classifier_tester - for *legacy tesseract* engine.
+
+SYNOPSIS
+--------
+*classifier_tester* -U 'unicharset_file' -F 'font_properties_file' -X 'xheights_file'  -classifier 'x' -lang 'lang' [-output_trainer trainer] *.tr
+
+DESCRIPTION
+-----------
+classifier_tester(1) runs Tesseract in a special mode.
+It takes a list of .tr files and tests a character classifier
+on data as formatted for training,
+but it doesn't have to be the same as the training data.
+
+IN/OUT ARGUMENTS
+----------------
+
+a list of .tr files
+
+OPTIONS
+-------
+-l 'lang'::
+	(Input) three character language code; default value 'eng'.
+
+-classifier 'x'::
+	(Input) One of "pruner", "full".
+
+
+-U 'unicharset'::
+	(Input) The unicharset for the language.
+
+-F 'font_properties_file'::
+	(Input) font properties file, each line is of the following form, where each field other than the font name is 0 or 1:
+
+	*font_name* *italic* *bold* *fixed_pitch* *serif* *fraktur*
+
+-X 'xheights_file'::
+	(Input) x heights file, each line is of the following form, where xheight is calculated as the pixel x height of a character drawn at 32pt on 300 dpi. [ That is, if base x height + ascenders + descenders = 133, how much is x height? ]
+
+	*font_name* *xheight*
+
+-output_trainer 'trainer'::
+	(Output, Optional) Filename for output trainer.
+
+SEE ALSO
+--------
+tesseract(1)
+
+COPYING
+-------
+Copyright \(C) 2012 Google, Inc.
+Licensed under the Apache License, Version 2.0
+
+AUTHOR
+------
+The Tesseract OCR engine was written by Ray Smith and his research groups
+at Hewlett Packard (1985-1995) and Google (2006-2018).