Zero-Shot Kernel Learning

Hongguang Zhang; Piotr Koniusz

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arXiv · 1802.01279

Zero-Shot Kernel Learning

Hongguang Zhang·Piotr Koniusz

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Abstract

In this paper, we address an open problem of zero-shot learning. Its principle is based on learning a mapping that associates feature vectors extracted from i.e. images and attribute vectors that describe objects and/or scenes of interest. In turns, this allows classifying unseen object classes and/or scenes by matching feature vectors via mapping to a newly defined attribute vector describing a new class. Due to importance of such a learning task, there exist many methods that learn semantic, probabilistic, linear or piece-wise linear mappings. In contrast, we apply well-established kernel methods to learn a non-linear mapping between the feature and attribute spaces. We propose an easy learning objective inspired by the Linear Discriminant Analysis, Kernel-Target Alignment and Kernel Polarization methods that promotes incoherence. We evaluate performance of our algorithm on the Polynomial as well as shift-invariant Gaussian and Cauchy kernels. Despite simplicity of our approach, we obtain state-of-the-art results on several zero-shot learning datasets and benchmarks including a recent AWA2 dataset.

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BibTeX RIS

Hongguang Zhang, Piotr Koniusz. 2018-02-05. Zero-Shot Kernel Learning. https://arxiv.org/abs/1802.01279

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