Challenge: Existing methods for cross-modal alignment assume a symmetric interaction between visual and textual modalities, implying that both spaces adapt to each other.
Approach: They propose a method that regularizes the projector to maintain the geometric structure of the text embedding space via spectral filtering.
Outcome: The proposed method preserves the LLM’s inherent linguistic capabilities and reduces object hallucination significantly better than standard fine-tuning methods.

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Challenge: Large language models (LLMs) exhibit impressive performance on a variety of tasks from text summarization to zero-shot common-sense reasoning.
Approach: They propose to manipulate the embedding space of mLLMs by manipulating its activations to steer generation into the desired direction.
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Cross-Modal Projection in Multimodal LLMs Doesn’t Really Project Visual Attributes to Textual Space (2024.acl-short)

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Challenge: Existing multimodal large language models are limited to general-purpose multimodal tasks like question-answering on natural images.
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Re-Align: Aligning Vision Language Models via Retrieval-Augmented Direct Preference Optimization (2025.emnlp-main)

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Challenge: emergence of large Vision Language Models (VLMs) has broadened the capabilities of single-modal Large Language Model (LLM) but VLMs are prone to significant hallucinations, especially in the form of cross-modal inconsistencies.
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Textual Steering Vectors Can Improve Visual Understanding in Multimodal Large Language Models (2026.acl-long)

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Challenge: Steering methods have emerged as effective tools for guiding large language models’ behavior, yet multimodal large language model lacks comparable techniques due to architectural diversity and limited availability of multimodal steering vectors.
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Multimodal Large Language Models for Text-rich Image Understanding: A Comprehensive Review (2025.findings-acl)

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Challenge: Recent advances in vision-language models have unified perception and understanding tasks within Visual Question Answering paradigms.
Approach: They propose to outline timeline, architecture, and pipeline of nearly all TIU MLLMs and review their performance on mainstream benchmarks.
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Representational Isomorphism and Alignment of Multilingual Large Language Models (2024.findings-emnlp)

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Challenge: Existing isomorphism of sentence representations can facilitate representational alignments in zero-shot and few-shot settings.
Approach: They propose to apply a contrastive objective to LLMs with a small number of translation pairs to improve models' performance on Semantic Textual Similarity tasks.
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Concept Space Alignment in Multilingual LLMs (2024.emnlp-main)

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Challenge: Multilingual large language models generalize somewhat across languages, but it is unclear whether this is a result of improved, implicit alignment, or of something else, e.g., linguistic overlap or semi-parallel subsets of training data.
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Generative Giants, Retrieval Weaklings: Why do Multimodal Large Language Models Fail at Multimodal Retrieval? (2026.findings-acl)

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Challenge: Rapid advances in multimodal large language models have revolutionized cross-modality understanding.
Approach: They propose a method that uses whitening transformations to adjust MLLM representation spaces . they propose ML models that are dominated by textual semantics and visual semantics .
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A Text is Worth Several Tokens: Text Embedding from LLMs Secretly Aligns Well with The Key Tokens (2025.acl-long)

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Challenge: et al., 2023) show that text embeddings from large language models can be aligned with key tokens in input text.
Approach: They propose a sparse retrieval method based on aligned tokens for large language models . they show that this phenomenon is universal and is not affected by model architecture .
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VFA: Empowering Multilingual MLLMs via Vision-Free Adaptation (2026.acl-long)

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Challenge: Multimodal large language models have advanced rapidly, yet most remain English-centric . scaling multilingual multimodal instruction tuning is limited by the scarcity and high cost of non-English image–text supervision.
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Outcome: The proposed framework achieves competitive performance with a fully multimodally trained model using less than 2% of the text data.

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