Task-Specific Metrics: BLEU, ROUGE, and Their Limits
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BLEU is from 2002 and ROUGE from 2004. They are routinely dismissed as obsolete by people who then spend forty dollars of judge calls detecting a regression that a character-level F-score would have caught in eight milliseconds. What BLEU computes BLEU (Papineni et al., 2002) was built for machine translation. It is a modified n-gram precision: of the n-grams in the candidate, what fraction appear in the reference — with each reference n-gram usable only as many times as it occurs, so repeating…
1Key Takeaways
- BLEU is from 2002 and ROUGE from 2004.
- They are routinely dismissed as obsolete by people who then spend forty dollars of judge calls detecting a regression that a character-level F-score would have caught in eight milliseconds.
- What BLEU computes BLEU (Papineni et al., 2002) was built for machine translation.
- It is a modified n-gram precision: of the n-grams in the candidate, what fraction appear in the reference — with each reference n-gram usable only as many times as it occurs, so repeating….
2AIWedia Score
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3Why it matters
Coding AI shifts how fast software ships and how much human review each change needs. DEV — ML reports that bLEU is from 2002 and ROUGE from 2004.
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