Challenge: Multimodal summarization with multimodal output (MSMO) has attracted increasing research interest . evaluation is an emerging yet underexplored research topic .
Approach: They propose a framework that studies three research questions of MSMO evaluation . they propose an automatic evaluation metric and a meta-evaluation benchmark dataset .
Outcome: The proposed evaluation metric and human-annotated meta-evaluation benchmark are used to assess the quality of evaluation metrics and show the framework is effective.

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MSMO: Multimodal Summarization with Multimodal Output (D18-1)

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Challenge: Existing studies show that multimodal summarization can improve user satisfaction for informativeness of summaries by using information in visual modality.
Approach: They propose a task to generate text and select the most relevant image from the multimodal input and a novel multimodal automatic evaluation method to evaluate multimodal outputs.
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Measuring What Matters Beyond Text: Evaluating Multimodal Summaries by Quality, Alignment, and Diversity (2026.findings-acl)

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Challenge: MLLMs have facilitated multimodal summarization with multimodal outputs, but their evaluation is fragmented . MM-Eval integrates assessments of textual quality, cross-modal alignment, and visual diversity .
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MLLM-Bench: Evaluating Multimodal LLMs with Per-sample Criteria (2025.naacl-long)

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Challenge: Existing evaluation methodologies for multimodal large language models are limited in evaluating objective queries without considering real-world user experiences.
Approach: They propose to evaluate multimodal large language models with per-sample criteria using potent MLLM as the judge.
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MDSEval: A Meta-Evaluation Benchmark for Multimodal Dialogue Summarization (2025.findings-emnlp)

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Challenge: Multimodal Dialogue Summarization (MDS) is a critical task with wide-ranging applications.
Approach: They propose a meta-evaluation benchmark for multimodal dialogue summarization based on image-sharing dialogues, corresponding summaries and human judgments .
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REFINESUMM: Self-Refining MLLM for Generating a Multimodal Summarization Dataset (2024.acl-long)

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Challenge: generating accurate and faithful multimodal summaries is challenging due to lack of appropriate multimodal datasets . large language models excel at synthesizing key information from diverse sources, but lack of adequate multimodal data sets for fine-tuning .
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Towards Multi-dimensional Evaluation of LLM Summarization across Domains and Languages (2025.acl-long)

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Challenge: Existing evaluation frameworks for text summarization lack domain-specific assessment criteria and are predominantly English-centric.
Approach: They propose a multi-dimensional, multi-domain evaluation of summarization in English and Chinese that incorporates specialized assessment criteria for each domain and leverages a debate system to enhance annotation quality.
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MMEvalPro: Calibrating Multimodal Benchmarks Towards Trustworthy and Efficient Evaluation (2025.naacl-long)

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Challenge: Large Multimodal Models (LMMs) exhibit impressive cross-modal understanding and reasoning abilities, but many benchmarks suffer from systematic biases.
Approach: They propose a benchmark to avoid Type-I errors by creating one perception question and one knowledge anchor question through a meticulous annotation process.
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QEVA: A Reference-Free Evaluation Metric for Narrative Video Summarization with Multimodal Question Answering (2025.findings-emnlp)

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Challenge: Existing video-to-text summarization evaluation methods depend heavily on human-written reference summaries.
Approach: They propose a reference-free metric evaluating candidate summaries directly against source videos through multimodal question answering.
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mRedditSum: A Multimodal Abstractive Summarization Dataset of Reddit Threads with Images (2023.emnlp-main)

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Challenge: Existing summarization datasets do not cover multimodal discussions, multiple modalities, or both . mRedditSum consists of 3,033 discussion threads and images with human-written summaries.
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Can We Edit Multimodal Large Language Models? (2023.emnlp-main)

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Challenge: Existing methods to edit multimodal models have been used to incrementally infuse a language model with a new set of facts.
Approach: They construct a benchmark for editing multimodal Large Language Models and establish metrics for evaluation.
Outcome: The proposed benchmarks show that editing multimodal models is not as difficult as editing single-modal models.

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