Title: Discriminative k-shot learning using probabilistic models,
Abstract: This paper introduces a probabilistic framework for k-shot image
classification. The goal is to generalise from an initial large-scale
classification task to a separate task comprising new classes and small numbers
of examples. The new approach not only leverages the feature-based
representation learned by a neural network from the initial task
(representational transfer), but also information about the classes (concept
transfer). The concept information is encapsulated in a probabilistic model for
the final layer weights of the neural network which acts as a prior for
probabilistic k-shot learning. We show that even a simple probabilistic model
achieves state-of-the-art on a standard k-shot learning dataset by a large
margin. Moreover, it is able to accurately model uncertainty, leading to well
calibrated classifiers, and is easily extensible and flexible, unlike many
recent approaches to k-shot learning.