Semantic-Guided Multi-Attention Localization for Zero-Shot Learning

TL;DR

This paper introduces a semantic-guided multi-attention localization model for zero-shot learning that automatically identifies discriminative object parts, enhancing classification accuracy without human annotations.

Contribution

It proposes a novel multi-attention localization approach that jointly learns global and local features with semantic guidance, improving zero-shot learning performance.

Findings

Outperforms state-of-the-art on three benchmarks

Effectively localizes discriminative object parts

Enhances feature discrimination with joint loss functions

Abstract

Zero-shot learning extends the conventional object classification to the unseen class recognition by introducing semantic representations of classes. Existing approaches predominantly focus on learning the proper mapping function for visual-semantic embedding, while neglecting the effect of learning discriminative visual features. In this paper, we study the significance of the discriminative region localization. We propose a semantic-guided multi-attention localization model, which automatically discovers the most discriminative parts of objects for zero-shot learning without any human annotations. Our model jointly learns cooperative global and local features from the whole object as well as the detected parts to categorize objects based on semantic descriptions. Moreover, with the joint supervision of embedding softmax loss and class-center triplet loss, the model is encouraged to learn features with high inter-class dispersion and intra-class compactness. Through comprehensive experiments on three widely used zero-shot learning benchmarks, we show the efficacy of the multi-attention localization and our proposed approach improves the state-of-the-art results by a considerable margin.