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- W2962952364 abstract "This paper addresses detecting anomalous patterns in images, time-series, and tensor data when the location and scale of the pattern is unknown a priori. The multiscale scan statistic convolves the proposed pattern with the image at various scales and returns the maximum of the resulting tensor. Scale corrected multiscale scan statistics apply different standardizations at each scale, and the limiting distribution under the null hypothesis---that the data is only noise---is known for smooth patterns. We consider the problem of simultaneously learning and detecting the anomalous pattern from a dictionary of smooth patterns and a database of many tensors. To this end, we show that the multiscale scan statistic is a subexponential random variable, and prove a chaining lemma for standardized suprema, which may be of independent interest. Then by averaging the statistics over the database of tensors we can learn the pattern and obtain Bernstein-type error bounds. We will also provide a construction of an $epsilon$-net of the location and scale parameters, providing a computationally tractable approximation with similar error bounds." @default.
- W2962952364 created "2019-07-30" @default.
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- W2962952364 date "2018-07-03" @default.
- W2962952364 modified "2023-09-27" @default.
- W2962952364 title "Learning Patterns for Detection with Multiscale Scan Statistics" @default.
- W2962952364 hasPublicationYear "2018" @default.
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