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Action Modifiers: Learning From Adverbs in Instructional Videos

CVPR 2020 · Video › Action recognition · approach: Temporal action segmentation · 1 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
Learn shared linear action-modifier transformations and action-query attentionAction Modifiers · Video-to-adverb, AllmAP: 0.621 -> 0.719Helped
Learn shared linear action-modifier transformations and action-query attentionAction Modifiers · Video-to-adverb, AntonymP@1: 0.728 -> 0.808Helped
Use the proposed method for adverb-to-video retrievalAction Modifiers · Adverb-to-video, AntonymmAP: 0.618 -> 0.657Helped
Use the proposed method for unrestricted adverb-to-video retrievalAction Modifiers · Adverb-to-video, AllmAP: 0.350 -> 0.329Hurt
Use a learned linear modifier instead of fixed or learned translations or a nonlinear transform (ablation)Action Modifiers · Video-to-adverb, AntonymP@1: 0.735, 0.749, 0.742 -> 0.808Helped
Add an initial action-only training stage before learning adverbs and modifiers (ablation)Action Modifiers · Video-to-adverb, AntonymP@1: 0.774 -> 0.808Helped
Use action-query multi-head scaled dot-product attention instead of single-clip, average, class-agnostic, or class-specific aggregation (ablation)Action Modifiers · Video-to-adverb, AntonymP@1: 0.705, 0.716, 0.708, 0.728 -> 0.808Helped
Use action-query multi-head scaled dot-product attention (ablation)Action Modifiers · Video-to-actionmAP: 0.246 -> 0.692Helped
Use two separate action and adverb losses instead of a single loss with mixed negatives (ablation)Action Modifiers · Video-to-adverb, AntonymP@1: +0.03 P@1Helped
Use only the antonym as the adverb-loss negative instead of another adverb (ablation)Action Modifiers · Video-to-adverb, AntonymP@1: +0.04 P@1Helped
Jointly learn action-relevant attention and action modifiers instead of using W-TALC localization followed by averaging (ablation)Action Modifiers · Video-to-adverb, AntonymP@1: 0.739 -> 0.808Helped
Use the action embedding as the attention query instead of a one-hot action, adverb, or action-adverb representation (ablation)Action Modifiers · Video-to-adverb, AntonymP@1: 0.736, 0.702, 0.731, 0.728 -> 0.774Helped

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