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MergedNET: A simple approach for one-shot learning in siamese networks based on similarity layers

14 Oct 2022Neurocomputing 2022 10archive 2025-07-28

John Atanbori, Samuel Rose

Classifiers trained on disjointed classes with few labelled data points are used in one-shot learning to identify visual concepts from other classes. Recently, Siamese networks and similarity layers have been used to solve the one-shot learning problem, achieving state-of-the-art performance on visual-character recognition datasets. Various techniques have been developed over the years to improve the performance of these networks on fine-grained image classification datasets. They focused primarily on improving the loss and activation functions, augmenting visual features, employing multiscale metric learning, and pre-training and fine-tuning the backbone network. We investigate similarity layers for one-shot learning tasks and propose two frameworks for combining these layers into a MergedNet network. On all four datasets used in our experiment, MergedNet outperformed the baselines based on classification accuracy, and it generalises to other datasets when trained on miniImageNet.

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Tasks

Few-Shot Image ClassificationFine-Grained Image ClassificationImage ClassificationMetric LearningOne-Shot Learningimage-classification

Results from the paper archive 2025-07-28

TaskDatasetModelMetricValueRank at snapshotLeaderboardReport
Few-Shot Image Classification CUB 200 5-way 1-shot MergedNet-Max Accuracy 75.34 #25 of 36 Archive leaderboard report
Few-Shot Image Classification CUB 200 5-way 5-shot MergedNet-Max Accuracy 83.42 #27 of 32 Archive leaderboard report
Few-Shot Image Classification Caltech-256 5-way (1-shot) MergedNet-Max Accuracy 65.77 #3 of 3 Archive leaderboard report
Few-Shot Image Classification Caltech-256 5-way (5-shot) MergedNet-Concat Accuracy 81.34 #1 of 1 Archive leaderboard report
Few-Shot Image Classification Mini-Imagenet 5-way (1-shot) MergedNet-Max Accuracy 68.05 #40 of 105 Archive leaderboard report
Few-Shot Image Classification Mini-Imagenet 5-way (5-shot) MergedNet-Max Accuracy 80.40 #51 of 95 Archive leaderboard report

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