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arXiv · 2009.11150

Information-Theoretic Visual Explanation for Black-Box Classifiers

Jihun Yi·Eunji Kim·Siwon Kim·Sungroh Yoon
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Abstract

In this work, we attempt to explain the prediction of any black-box classifier from an information-theoretic perspective. For each input feature, we compare the classifier outputs with and without that feature using two information-theoretic metrics. Accordingly, we obtain two attribution maps--an information gain (IG) map and a point-wise mutual information (PMI) map. IG map provides a class-independent answer to "How informative is each pixel?", and PMI map offers a class-specific explanation of "How much does each pixel support a specific class?" Compared to existing methods, our method improves the correctness of the attribution maps in terms of a quantitative metric. We also provide a detailed analysis of an ImageNet classifier using the proposed method, and the code is available online.

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Jihun Yi, Eunji Kim, Siwon Kim, Sungroh Yoon. 2020-09-23. Information-Theoretic Visual Explanation for Black-Box Classifiers. https://arxiv.org/abs/2009.11150

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