arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1802.08129cs.AIcs.CLcs.CV
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多模态解释:证明决策和指向证据

Multimodal Explanations: Justifying Decisions and Pointing to the Evidence

UC Berkeley(加州大学伯克利分校);University of Amsterdam(阿姆斯特丹大学);MPI for Informatics(马克斯·普朗克信息学研究所);Facebook AI Research(脸书人工智能研究院)

Dong Huk Park, Lisa Anne Hendricks, Zeynep Akata, Anna Rohrbach, Bernt Schiele, Trevor Darrell, Marcus Rohrbach

摘要:

在许多情况下,既有效又可解释的深度模型是可取的;以前的可解释模型是单峰的,提供基于图像的注意力权重可视化或基于文本的事后理由生成。我们提出了一个多模态的解释方法,并认为这两种模式提供互补的解释优势。我们收集了两个新的数据集来定义和评估这个任务,并提出了一个新的模型,可以提供联合文本的理由生成和注意力可视化。我们的数据集定义了活动识别任务(ACT-X)和视觉问答任务(VQA-X)的分类决策的视觉和文本理由。我们定量地表明,使用文本解释进行训练不仅可以产生更好的文本证明模型,而且可以更好地定位支持决策的证据。我们还定性地展示了视觉解释比文本解释更有洞察力的情况,反之亦然,支持我们的论点,即多模态解释模型提供了显着的好处比单峰方法。

英文摘要:

Deep models that are both effective and explainable are desirable in many settings; prior explainable models have been unimodal, offering either image-based visualization of attention weights or text-based generation of post-hoc justifications. We propose a multimodal approach to explanation, and argue that the two modalities provide complementary explanatory strengths. We collect two new datasets to define and evaluate this task, and propose a novel model which can provide joint textual rationale generation and attention visualization. Our datasets define visual and textual justifications of a classification decision for activity recognition tasks (ACT-X) and for visual question answering tasks (VQA-X). We quantitatively show that training with the textual explanations not only yields better textual justification models, but also better localizes the evidence that supports the decision. We also qualitatively show cases where visual explanation is more insightful than textual explanation, and vice versa, supporting our thesis that multimodal explanation models offer significant benefits over unimodal approaches.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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