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Few-Shot Incremental Learning With Continually Evolved Classifiers

CVPR 2021 · Continual learning › Class-incremental · approach: Few-shot class-incremental prototypes · 363 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
Add continual classifier adaptation trained with pseudo incremental learning (ablation)Decoupled cosine classifier with data initialization · CUB200session 10 accuracy: 49.31 -> 52.28Helped
Train the adaptation module with pseudo incremental learning instead of meta-learning (ablation)CEC · CUB200performance dropping rate: 26.45 -> 23.57Helped
Add the adaptation module without pseudo incremental learning (ablation)Decoupled cosine classifier with data initialization · CUB200session 10 accuracy: 49.31 -> 49.15No clear effect
Decouple representation learning from classifier learning (ablation)Cosine classifier · CUB200PD: 72.80 -> 44.00Helped
Decouple representation learning from classifier learning (ablation)Linear classifier · CUB200PD: 70.49 -> 67.10Helped
Initialize classifier weights with average training-data embeddings (ablation)Classifiers · CUB200session 10 accuracyHelped
Use a cosine classifier rather than linear, L2, or DeepEMD classifiers (ablation)Decoupled classifier with data initialization · CUB200session 10 accuracy: 32.76, 41.62, 47.60 -> 49.31Helped
Use a decoupled cosine classifier instead of a non-decoupled cosine classifier (ablation)Cosine classifier · CUB200session 10 accuracy: 0.52 -> 30.36Helped
Use a decoupled linear classifier instead of a non-decoupled linear classifier (ablation)Linear classifier · CUB200session 10 accuracy: 0.53 -> 3.92Helped
Use larger way and fewer shots when constructing pseudo incremental episodes (ablation)CEC pseudo incremental learning · CUB200last-session accuracyHelped
Synthesize pseudo classes with large rotations rather than small rotations (ablation)CEC pseudo incremental learning · CUB200average accuracy: 61.33%Helped
Use random 90°, 180°, and 270° rotations to synthesize pseudo classes (ablation)CEC pseudo incremental learning · CUB200PD: 23.57%Helped

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