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Scaling Up Visual and Vision-Language Representation Learning With Noisy Text Supervision

ICML 2021 · Vision-language and multimodal › CLIP and zero-shot · approach: Recaptioning and text-supervised pretraining · 1,195 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
train on noisy web alt-text pairs at billion-example scale with a dual-encoder contrastive objectiveALIGN · Flickr30K and MSCOCO zero-shot retrievalR@1: Flickr30K image-to-text: 88.0 -> 88.6; Flickr30K text-to-image: 68.7 -> 75.7; MSCOCO image-to-text: 58.4 -> 58.6; MSCOCOHelped
fine-tune the ALIGN dual encoder on task-specific retrieval dataALIGN · Flickr30K and MSCOCO fine-tuned retrievalR@1: Flickr30K image-to-text: 88.7 -> 95.3; MSCOCO image-to-text: 73.5 -> 77.0Helped
use cross-modal image-text training rather than intra-modal matching objectivesALIGN · CxCR@1: image-to-text 55.9 -> 78.1; text-to-image 41.7 -> 61.8; text-to-text 42.4 -> 45.4Mixed
use prompt ensembling for class-name text embeddingsALIGN zero-shot classifier · ImageNettop-1 accuracy: +2.9%Helped
increase embedding dimension from the 640-dimensional baseline to 1376 for the larger model (ablation)ALIGN · MSCOCO zero-shot retrieval and ImageNet KNNR@1Helped
reduce embedding dimension from 640 to 320 (ablation)B5 + BERT-base · MSCOCO zero-shot image-to-textR@1: 51.7 -> 50.3Hurt
reduce embedding dimension from 640 to 160 (ablation)B5 + BERT-base · MSCOCO zero-shot image-to-textR@1: 51.7 -> 47.0Hurt
reduce embedding dimension from 640 to 80 (ablation)B5 + BERT-base · MSCOCO zero-shot image-to-textR@1: 51.7 -> 42.0Hurt
use only 50% of the in-batch negatives (ablation)B5 + BERT-base · MSCOCO zero-shot image-to-textR@1: 51.7 -> 50.2Hurt
use only 25% of the in-batch negatives (ablation)B5 + BERT-base · MSCOCO zero-shot image-to-textR@1: 51.7 -> 48.7Hurt
fix softmax temperature at 1/128 instead of learning it (ablation)B5 + BERT-base · MSCOCO zero-shot image-to-textR@1: 51.7 -> 52.2Helped
fix softmax temperature at 1/64 instead of learning it (ablation)B5 + BERT-base · MSCOCO zero-shot image-to-textR@1: 51.7 -> 52.2Helped

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