Add a new BLEU metric to Evidently

[elenasamuylova]

About Hacktoberfest contributions: https://github.com/evidentlyai/evidently/wiki/Hacktoberfest-2024

Descripton.

The BLEU (Bilingual Evaluation Understudy) metric is used to evaluate the quality of machine-generated text, typically translations, by comparing it to the reference texts. BLEU measures how closely the generated text matches the reference using n-gram precision, with a penalty for overly short or incomplete translations.

We can implement a BLEU metric that computes scores for each row and a summary BLEU metric for the dataset.

Note that this implementation would require creating a new Metric (instead of defaulting to ColumnSummaryMetric to aggregate descriptors values) to compute and visualize the summary BLEU score. You can check other dataset-level metrics (e.g., from classification or ranking) for inspiration.

Note: we can also consider implementing METEOR metric as an option.

[srini047]

Hi @elenasamuylova ,

I would like to work on this issue.

EDIT: Don't have the bandwidth. Sorry for the inconvenience.

[pmittaldev]

I can take it.

[vectorvp]

@elenasamuylova, does it still in need? I would like to contribute.