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Relational Embedding for Few-Shot Classification

2021-08-22ICCV 2021Code Available1· sign in to hype

Dahyun Kang, Heeseung Kwon, Juhong Min, Minsu Cho

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Abstract

We propose to address the problem of few-shot classification by meta-learning "what to observe" and "where to attend" in a relational perspective. Our method leverages relational patterns within and between images via self-correlational representation (SCR) and cross-correlational attention (CCA). Within each image, the SCR module transforms a base feature map into a self-correlation tensor and learns to extract structural patterns from the tensor. Between the images, the CCA module computes cross-correlation between two image representations and learns to produce co-attention between them. Our Relational Embedding Network (RENet) combines the two relational modules to learn relational embedding in an end-to-end manner. In experimental evaluation, it achieves consistent improvements over state-of-the-art methods on four widely used few-shot classification benchmarks of miniImageNet, tieredImageNet, CUB-200-2011, and CIFAR-FS.

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Benchmark Results

DatasetModelMetricClaimedVerifiedStatus
CIFAR-FS 5-way (1-shot)RENetAccuracy74.51Unverified
CIFAR-FS 5-way (5-shot)RENetAccuracy86.6Unverified
CUB 200 5-way 1-shotRENetAccuracy79.49Unverified
CUB 200 5-way 5-shotRENetAccuracy91.11Unverified
Mini-Imagenet 5-way (1-shot)RENetAccuracy67.6Unverified
Mini-Imagenet 5-way (5-shot)RENetAccuracy82.58Unverified
Tiered ImageNet 5-way (1-shot)RENetAccuracy71.61Unverified
Tiered ImageNet 5-way (5-shot)RENetAccuracy85.28Unverified

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