Image Captioning Evaluation in the Age of Multimodal LLMs: Challenges and Future Perspectives

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Hauptverfasser: Sarto, Sara, Cornia, Marcella, Cucchiara, Rita
Format: Preprint
Veröffentlicht: 2025
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author Sarto, Sara
Cornia, Marcella
Cucchiara, Rita
author_facet Sarto, Sara
Cornia, Marcella
Cucchiara, Rita
contents The evaluation of machine-generated image captions is a complex and evolving challenge. With the advent of Multimodal Large Language Models (MLLMs), image captioning has become a core task, increasing the need for robust and reliable evaluation metrics. This survey provides a comprehensive overview of advancements in image captioning evaluation, analyzing the evolution, strengths, and limitations of existing metrics. We assess these metrics across multiple dimensions, including correlation with human judgment, ranking accuracy, and sensitivity to hallucinations. Additionally, we explore the challenges posed by the longer and more detailed captions generated by MLLMs and examine the adaptability of current metrics to these stylistic variations. Our analysis highlights some limitations of standard evaluation approaches and suggests promising directions for future research in image captioning assessment.
format Preprint
id arxiv_https___arxiv_org_abs_2503_14604
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle Image Captioning Evaluation in the Age of Multimodal LLMs: Challenges and Future Perspectives
Sarto, Sara
Cornia, Marcella
Cucchiara, Rita
Computer Vision and Pattern Recognition
Artificial Intelligence
Computation and Language
The evaluation of machine-generated image captions is a complex and evolving challenge. With the advent of Multimodal Large Language Models (MLLMs), image captioning has become a core task, increasing the need for robust and reliable evaluation metrics. This survey provides a comprehensive overview of advancements in image captioning evaluation, analyzing the evolution, strengths, and limitations of existing metrics. We assess these metrics across multiple dimensions, including correlation with human judgment, ranking accuracy, and sensitivity to hallucinations. Additionally, we explore the challenges posed by the longer and more detailed captions generated by MLLMs and examine the adaptability of current metrics to these stylistic variations. Our analysis highlights some limitations of standard evaluation approaches and suggests promising directions for future research in image captioning assessment.
title Image Captioning Evaluation in the Age of Multimodal LLMs: Challenges and Future Perspectives
topic Computer Vision and Pattern Recognition
Artificial Intelligence
Computation and Language
url https://arxiv.org/abs/2503.14604