Feat: Add normalize option to CER and WER metrics for normalized score calculation #667
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This pull request introduces a normalize option to the compute() function of both the CER and WER metrics. When set to True, the metrics will calculate and return normalized scores.
This addresses the feature request raised in issue #161 from 2022, which has remained unaddressed. This implementation allows users to calculate CER and WER scores ranging from 0 to 100%, as requested in the issue.
The normalized CER is calculated as:
The normalized WER is calculated similarly, at the word level.