Believe The HiPe: Hierarchical Perturbation for Fast, Robust and Model-Agnostic Explanations

22 Feb 2021  ·  Jessica Cooper, Ognjen Arandjelović, David J Harrison ·

Understanding the predictions made by Artificial Intelligence (AI) systems is becoming more and more important as deep learning models are used for increasingly complex and high-stakes tasks. Saliency mapping - an easily interpretable visual attribution method - is one important tool for this, but existing formulations are limited by either computational cost or architectural constraints... We therefore propose Hierarchical Perturbation, a very fast and completely model-agnostic method for explaining model predictions with robust saliency maps. Using standard benchmarks and datasets, we show that our saliency maps are of competitive or superior quality to those generated by existing model-agnostic methods - and are over 20X faster to compute. read more

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