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Heatmap-based Out-of-Distribution Detection. (arXiv:2211.08115v1 [cs.CV])
Nov. 16, 2022, 2:15 a.m. | Julia Hornauer, Vasileios Belagiannis
cs.CV updates on arXiv.org arxiv.org
Our work investigates out-of-distribution (OOD) detection as a neural network
output explanation problem. We learn a heatmap representation for detecting OOD
images while visualizing in- and out-of-distribution image regions at the same
time. Given a trained and fixed classifier, we train a decoder neural network
to produce heatmaps with zero response for in-distribution samples and high
response heatmaps for OOD samples, based on the classifier features and the
class prediction. Our main innovation lies in the heatmap definition for an …
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