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End-To-End Concept Word Detection for Video Captioning, Retrieval, and Question Answering

CVPR 2017 · Video › Video-language understanding · approach: Video-language pretraining · 228 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
Add end-to-end concept-word detection and semantic attention to the base modelBase-SAN · LSMDC16 movie descriptionBLEU-4: 0.005 -> 0.008Helped
Add end-to-end concept-word detection and semantic attention to the base modelBase-SAN · LSMDC16 fill-in-the-blankaccuracy: 34.5 -> 41.9Helped
Add end-to-end concept-word detection and semantic attention to the base modelBase-SAN · LSMDC16 multiple-choiceaccuracy: 60.1 -> 63.8Helped
Add end-to-end concept-word detection and semantic attention to the base modelBase-SAN · LSMDC16 movie retrievalRecall@1: 4.3 -> 4.5Helped
Replace detected concept words with randomly sampled words (ablation)CT-SAN · LSMDC16 fill-in-the-blankaccuracy: 41.9 -> 17.0Hurt
Replace spatial-attention concept detection with a single LSTM on pooled video features (ablation)CT-SAN · LSMDC16 fill-in-the-blankaccuracy: 41.9 -> 37.4Hurt
Train the concept detector separately instead of jointly end-to-end (ablation)CT-SAN · LSMDC16 fill-in-the-blankaccuracy: 41.9 -> 35.4Hurt
Use nearest-neighbor video concept words instead of detected words (ablation)CT-SAN · LSMDC16 fill-in-the-blankaccuracy: 41.9 -> 12.1Hurt
Vary the number of detected concept words from 10 to 5 or 20 (ablation)CT-SAN · LSMDC16 movie descriptionBLEU-4: 0.007, 0.008, 0.008No clear effect
Remove output semantic attention (ablation)CT-SAN · LSMDC16 movie descriptionBLEU-4: 0.008 -> 0.006Hurt
Remove input semantic attention (ablation)CT-SAN · LSMDC16 fill-in-the-blankaccuracy: 41.9 -> 39.1Hurt
Ensemble six independently trained modelsCT-SAN multiple-choice · LSMDC16 multiple-choiceaccuracy: 63.8 -> 67.0Helped

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