Function opencv::text::create_ocrhmm_transitions_table

pub fn create_ocrhmm_transitions_table(
    vocabulary: &mut String, 
    lexicon: &mut Vector<String>, 
    transition_probabilities_table: &mut dyn ToOutputArray
) -> Result<()>

Utility function to create a tailored language model transitions table from a given list of words (lexicon).

Parameters

• vocabulary: The language vocabulary (chars when ASCII English text).

• lexicon: The list of words that are expected to be found in a particular image.

• transition_probabilities_table: Output table with transition probabilities between character pairs. cols == rows == vocabulary.size().

The function calculate frequency statistics of character pairs from the given lexicon and fills the output transition_probabilities_table with them. The transition_probabilities_table can be used as input in the OCRHMMDecoder::create() and OCRBeamSearchDecoder::create() methods.

Note:

• (C++) An alternative would be to load the default generic language transition table provided in the text module samples folder (created from ispell 42869 english words list) : https://github.com/opencv/opencv_contrib/blob/master/modules/text/samples/OCRHMM_transitions_table.xml