Cartoon Explanations of Image Classifiers. (arXiv:2110.03485v4 [cs.AI] UPDATED)

We present {CartoonX} (Cartoon Explanation), a novel model-agnostic
explanation method tailored towards image classifiers and based on the
rate-distortion explanation (RDE) framework. Natural images are roughly
piece-wise smooth signals -- also called cartoon-like images -- and tend to be
sparse in the wavelet domain. CartoonX is the first explanation method to
exploit this by requiring its explanations to be sparse in the wavelet domain,
thus extracting the {relevant piece-wise smooth} part of an image instead of
relevant pixel-sparse regions. We …

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