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MorphoSHAP: Rethinking the Unit of Attribution in Explanation for Deep Visual Models

arXiv · AI, language, vision and robotics · article · Sep 22, 2026 · UTC

Visual attribution methods typically explain predictions using pixels, superpixels, or regular patches. These representations can localize important regions, but provide limited information about their structure. We introduce MorphoSHAP, a model-agnostic post-hoc method that instead uses morphological shapes as the players of a Shapley attribution game. Using the Tree of Shapes, each shape is described by its scale, geometry, and signed contribution, providing explanations of where the evidence lies, what type of structure carries it, and how strongly it affects the prediction. This shared mor

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