The invention relates to a method for ascertaining error types for incorrect
reading results from an OCR reader for text units which have a standard content
structure and are subdivided into distinguishable sections, using true reference
data. Reference data for the respective incorrectly read text unit are used for
automatically ascertaining the respective text unit with the associated sections
in a dictionary for the text units which contains a text unit, subdivided into
individual, distinct sections, for each searchable entry. The reading result data
are used to search the dictionary for a text unit with associated sections. The
sections found with the respective corresponding reference sections are then compared
pair by pair and the respective incorrect reading result is classified into stipulated
error classes on the basis of the discrepancies ascertained in the pair by pair comparison.
