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Unsupervised Feature Learning in Remote Sensing (arxiv.org)
2 points by sel1 on Aug 11, 2019 | hide | past | pdf | discuss on HN

In plain words: A system learns to describe satellite images by practicing on unlabeled photos, instead of needing every image labeled by hand. The learned descriptions then handle picture search, spotting odd ones out, and sorting objects into groups on their own, even for rare objects.

Abstract

The need for labeled data is among the most common and well-known practical obstacles to deploying deep learning algorithms to solve real-world problems. The current generation of learning algorithms requires a large volume of data labeled according to a static and pre-defined schema. Conversely, humans can quickly learn generalizations based on large quantities of unlabeled data, and turn these generalizations into classifications using spontaneous labels, often including labels not seen before. We apply a state-of-the-art unsupervised learning algorithm to the noisy and extremely imbalanced xView data set to train a feature extractor that adapts to several tasks: visual similarity search that performs well on both common and rare classes; identifying outliers within a labeled data set; and learning a natural class hierarchy automatically.

Aaron Reite, Scott Kangas, Zackery Steck, Steven Goley, Jonathan Von Stroh, Steven Forsyth
arXiv:1908.02877 · cs.CV, cs.LG, eess.IV · submitted Aug 7, 2019
abstract · pdf · html

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