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- W4386075650 abstract "Detecting out-of-distribution (OOD) inputs during the inference stage is crucial for deploying neural networks in the real world. Previous methods typically relied on the highly activated feature map outputted by the network. In this study, we revealed that the norm of the feature map obtained from a block other than the last block can serve as a better indicator for OOD detection. To leverage this insight, we propose a simple framework that comprises two metrics: FeatureNorm, which computes the norm of the feature map, and NormRatio, which calculates the ratio of FeatureNorm for ID and OOD samples to evaluate the OOD detection performance of each block. To identify the block that provides the largest difference between FeatureNorm of ID and FeatureNorm of OOD, we create jigsaw puzzles as pseudo OOD from ID training samples and compute NormRatio, selecting the block with the highest value. After identifying the suitable block, OOD detection using FeatureNorm outperforms other methods by reducing FPR95 by up to 52.77% on CIFAR10 benchmark and up to 48.53% on ImageNet benchmark. We demonstrate that our framework can generalize to various architectures and highlight the significance of block selection, which can also improve previous OOD detection methods. Our code is available at https://github.com/gistailab/block-selection-for-OOD-detection." @default.
- W4386075650 created "2023-08-23" @default.
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- W4386075650 date "2023-06-01" @default.
- W4386075650 modified "2023-10-02" @default.
- W4386075650 title "Block Selection Method for Using Feature Norm in Out-of-Distribution Detection" @default.
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- W4386075650 doi "https://doi.org/10.1109/cvpr52729.2023.01507" @default.
- W4386075650 hasPublicationYear "2023" @default.
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