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Seong-heum Kim

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#natural language process... Preprint Sep 2026

FACET at WMT 2026 Automated Translation Quality Evaluation Task

Different error types in machine translation require different evidence. Whether meaning is preserved can be judged only against the source, while whether the target is well-formed, or whether it names one entity consistently, can be judged from the target alone. We present FACET, our reference-free submission to the W...

Ahrii Kim, Chanjun Park, Seong-heum Kim · 0 citations
Preprint Aug 2026

Multi-Agent Target-Existence Verification and Learned Mask Geometry Refinement: Winning Report of the MeViS-Text Track at the 8th LSVOS Challenge 2026

This work decouple existence verification into an independent multi-agent audit of the full predicate that distinguishes absence from temporary invisibility, discounts apparent motion caused by camera movement, and requires contradicting evidence rather than mere uncertainty for a no-target verdict.

Jungyoon Lee, Gyu-Seong Lim, Doeon Kim et al. · 0 citations
Review Sep 2026

Report of the 8th LSVOS Challenge: Complex and Multimodal Video Object Segmentation

This report summarizes the 8th Large-scale Video Object Segmentation (LSVOS) Challenge, held in conjunction with ECCV 2026. The challenge evaluates video segmentation in three complementary settings: complex semi-supervised video object segmentation on MOSEv2, text-guided referring video object segmentation on MeViSv2-...

Chang Liu, Heng-Hui Ding, Ling-Yi Hong et al. · 0 citations
#natural language process... Preprint Sep 2026

The Blindness of Document-Level Translation Evaluation

Document-level machine translation (MT) evaluation extends segment-level protocols by presenting full documents to annotators, on the assumption that such presentation elicits document-level judgments. We test this assumption with a counterfactual condition (MIX) in which each document combines segments drawn from diff...

Ahrii Kim, Vilém Zouhar, Chanjun Park et al. · 0 citations
#natural language process... Preprint Sep 2026

Discourse Dependency: A Continuous Criterion for Translation Difficulty

Recent calls for harder machine translation benchmarks have not clarified what difficulty should mean. We argue that one meaningful and currently unmeasured axis is referential reach, the distance a segment must look back into its document to resolve the entities and pronouns it contains. We formalize this as discourse...

Ahrii Kim, Chanjun Park, Seong-heum Kim · 0 citations

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