Method and apparatus for correcting character errors, electronic device and storage medium

An electronic device, comprising:

• at least one processor;
• and
• a memory communicatively connected with the at least one processor;
• wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform a method for correcting character errors, wherein the method comprises:
• for a character to be processed, acquiring the score of each character in a pre-constructed vocabulary, the score being a score of the reasonability of the character in the vocabulary at the position of the character to be processed;
• selecting top K characters as candidates of the character to be processed, K being a positive integer greater than one;
• and
• selecting an optimal candidate from the K candidates, and replacing the character to be processed with the optimal candidate if the optimal candidate is different from the character to be processed,
• wherein the acquiring the score of each character in a pre-constructed vocabulary comprises:
• determining the score of each character in the vocabulary with a pre-trained language model,
• wherein the acquiring the language model comprises:
• acquiring first-class training data, any piece of the first-class training data comprising an input text and an output text which are the same and do not contain wrongly written characters;
• pre-training the language model at character granularity utilizing the first-class training data;
• acquiring second-class training data, any piece of the second-class training data comprising an input text containing wrongly written characters and an output text which is a correct text corresponding s to the input text and does not contain wrongly written characters;
• and
• fine-tuning the language model using the second-class training data, and
• in the fine-tuning process, only the position of the wrongly written character is calculated to update the parameters of the language model.

A non-transitory computer-readable storage medium storing computer instructions therein, wherein the computer instructions are used to cause the computer to perform a method for correcting character errors, wherein the method comprises:

• for a character to be processed, acquiring the score of each character in a pre-constructed vocabulary, the score being a score of the reasonability of the character in the vocabulary at the position of the character to be processed;
• selecting top K characters as candidates of the character to be processed, K being a positive integer greater than one;
• and
• selecting an optimal candidate from the K candidates, and replacing the character to be processed with the optimal candidate if the optimal candidate is different from the character to be processed,
• wherein the acquiring the score of each character in a pre-constructed vocabulary comprises:
• determining the score of each character in the vocabulary with a pre-trained language model,
• wherein the acquiring the language model comprises:
• acquiring first-class training data, any piece of the first-class training data comprising an input text and an output text which are the same and do not contain wrongly written characters;
• pre-training the language model at character granularity utilizing the first-class training data;
• acquiring second-class training data, any piece of the second-class training data comprising an input text containing wrongly written characters and an output text which is a correct text corresponding to the input text and does not contain wrongly written characters;
• and
• fine-tuning the language model using the second-class training data, and
• in the fine-tuning process, only the position of the wrongly written character is calculated to update the parameters of the language model.