Large Language Models are Temporal and Causal Reasoners for Video Question Answering
作者: Dohwan Ko, Ji Soo Lee, Wooyoung Kang, Byungseok Roh, Hyunwoo J. Kim
分类: cs.CV
发布日期: 2023-10-24 (更新: 2023-11-06)
备注: Accepted paper at EMNLP 2023 Main
🔗 代码/项目: GITHUB
💡 一句话要点
提出Flipped-VQA框架以解决视频问答中的语言偏见问题
🎯 匹配领域: 支柱九:具身大模型 (Embodied Foundation Models)
关键词: 视频问答 语言模型 多模态学习 推理能力 语言偏见 Flipped-VQA 视觉理解
📋 核心要点
- 现有方法在视频问答中存在语言偏见问题,模型过度依赖问题而忽视视觉信息,导致错误答案。
- 本文提出Flipped-VQA框架,通过翻转源对和目标标签,促进模型理解复杂的$ extit{
}$关系。 - 实验结果表明,LLaMA-VQA在五个视频问答基准上表现优异,显著提升了模型的准确性和鲁棒性。
📝 摘要(中文)
大型语言模型(LLMs)在自然语言理解和生成任务中表现出色,但在视频问答(VideoQA)中,它们往往过度依赖问题而忽视视觉内容,导致不理想的结果。为了解决这一问题,本文提出了一种新颖的框架Flipped-VQA,鼓励模型通过翻转源对和目标标签来预测所有的$ extit{
🔬 方法详解
问题定义:本文旨在解决视频问答中模型对问题的过度依赖,导致的语言偏见和不准确的回答。现有方法往往忽视视觉内容,造成了所谓的“无根猜测”或“幻觉”。
核心思路:Flipped-VQA框架通过翻转$ extit{
技术框架:该框架的整体流程包括三个主要模块:首先,模型接收视频和问题对;其次,通过翻转源对和目标标签生成新的训练样本;最后,模型在新的样本上进行训练,以增强其对复杂关系的理解。
关键创新:Flipped-VQA的核心创新在于其翻转机制,使得模型不仅仅依赖于问题,而是同时考虑视觉信息和语言信息的交互,显著改善了模型的推理能力。
关键设计:在模型设计中,采用了特定的损失函数来平衡视觉和语言信息的权重,并通过多轮训练来优化模型参数,确保其在不同视频问答任务中的适应性和准确性。
🖼️ 关键图片
📊 实验亮点
实验结果显示,LLaMA-VQA在五个视频问答基准上超越了现有的LLMs和非LLMs模型,提升幅度达到XX%。Flipped-VQA不仅增强了语言模型的推理能力,还有效降低了因语言偏见导致的错误回答。
🎯 应用场景
该研究具有广泛的应用潜力,尤其在视频理解、智能问答系统和多模态学习等领域。通过提升视频问答的准确性,Flipped-VQA可以为教育、娱乐和安全监控等行业提供更智能的解决方案,推动人机交互的进步。
📄 摘要(原文)
Large Language Models (LLMs) have shown remarkable performances on a wide range of natural language understanding and generation tasks. We observe that the LLMs provide effective priors in exploiting $\textit{linguistic shortcuts}$ for temporal and causal reasoning in Video Question Answering (VideoQA). However, such priors often cause suboptimal results on VideoQA by leading the model to over-rely on questions, $\textit{i.e.}$, $\textit{linguistic bias}$, while ignoring visual content. This is also known as
ungrounded guesses' orhallucinations'. To address this problem while leveraging LLMs' prior on VideoQA, we propose a novel framework, Flipped-VQA, encouraging the model to predict all the combinations of $\langle$V, Q, A$\rangle$ triplet by flipping the source pair and the target label to understand their complex relationships, $\textit{i.e.}$, predict A, Q, and V given a VQ, VA, and QA pairs, respectively. In this paper, we develop LLaMA-VQA by applying Flipped-VQA to LLaMA, and it outperforms both LLMs-based and non-LLMs-based models on five challenging VideoQA benchmarks. Furthermore, our Flipped-VQA is a general framework that is applicable to various LLMs (OPT and GPT-J) and consistently improves their performances. We empirically demonstrate that Flipped-VQA not only enhances the exploitation of linguistic shortcuts but also mitigates the linguistic bias, which causes incorrect answers over-relying on the question. Code is available at https://github.com/mlvlab/Flipped-VQA.