arXiv Computer Vision

Detecting and Explaining Fake News Short Videos with Multimodal Content and Real-World Evidence

arXiv AI
Jul 21

Sparse Evidence Can Suffice: Agentic Evidence Seeking for Multimodal Video Misinformation Detection

arXiv:2607. 18080v1 Announce Type: cross Abstract: Multimodal video misinformation detection is commonly formulated as a holistic video-understanding task, where the entire video and its associated content are processed and judged in a single pass.

By Haochen Zhao, Yongxiu Xu, Xinkui Lin, Dong Xie, Jiarui Lu, Yuqi Qian, Yubin Wang, Hongbo Xu, Gaopeng Gou
Hugging Face Trending Papers
Jul 20

Sparse Evidence Can Suffice: Agentic Evidence Seeking for Multimodal Video Misinformation Detection

Multimodal video misinformation detection is commonly formulated as a holistic video-understanding task, where the entire video and its associated content are processed and judged in a single pass. However, real-world misinformation often exhibits a sparse and compositional evidence structure: a reliable decision may depend on only a few coupled clues, while most video content contributes limited additional information.

arXiv Computation and Language
Oct 9

MiniVer-V: Identifying Minimal Sufficient Evidence for Short Video Verification

MiniVer‑V is a new benchmark for short‑video fact‑checking that contains 195 videos, each annotated with a supported, refuted, or insufficient verdict and 5,510 multimodal evidence units (visual keyframes, speech transcripts, and web‑retrieved sources). The authors propose a two‑layer verification framework that first checks claim‑video consistency using internal evidence, then determines the factual verdict with external corroboration, and employs a sufficiency‑driven greedy search to assemble only the minimal evidence needed for a confident decision. Using Claude Sonnet 4, the method achieves a Macro‑F1 of 0.510 with an average of 4.5 evidence units—about 16 % of the full set—while matching the full‑evidence baseline and improving detection of insufficient cases.

By Leran Chen, Lingnan Kong, Zile Cai
arXiv AI
2d ago

Clips2Story: Training-Free Video Storyboarding and Editing Using Multimodal Retrieval-Embedded Generation

Clips2Story is a training‑free, LLM‑based pipeline that lets users generate short videos from a pool of clips by specifying a keyword. It first extracts multimodal descriptors from each clip, retrieves the most relevant ones, and then uses an LLM to select, arrange, and narrate them into an editable storyboard. The final video is assembled by combining the chosen clips with visuals that match the narration. Evaluation on a synthetic dataset of shuffled clips from 100 long‑form videos shows that Clips2Story achieves better narrative coherence, keyword alignment, and realism than a strong baseline.

By Junnuo Wang, Weihan Xu, Hao-Wen Dong
arXiv Computation and Language
Oct 28

Decoupling Consistency and Conflict across MLLM Layers for Fake News Detection

The paper introduces Multi-Level Consistency and Conflict Decoupling (MLCCD), a method for detecting fake news in multimodal content by leveraging the layered knowledge of multimodal large language models (MLLMs). MLCCD first selects relevant visual and textual tokens using the MLLM’s final decision representation, then identifies tokens whose representations change sharply across adjacent layers to capture layer‑specific knowledge. Finally, it decouples this knowledge into consistency and conflict evidence, aggregating each across layers with dedicated routers that adapt to varying conflict levels, achieving superior performance on three benchmarks.

By Kai Qian, Dongjie Xu, Weijie Shi, Jiaqi Wang, Haolun Ma, Jia Zhu, Jiajie Xu