Papers by Arun Ross

1 papers
S2H-DPO: Hardness-Aware Preference Optimization for Vision–Language Models (2026.findings-acl)

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Challenge: Existing methods focus on localized reasoning with pre-specified image indices, bypassing the skills of global visual search and autonomous cross-image comparison.
Approach: They propose a learning framework that constructs multi-image preference data across three hierarchical reasoning levels requiring an increasing level of capabilities.
Outcome: The proposed approach maintains strong single-image reasoning performance while strengthening multi-image understanding capabilities.

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