ConceptFlow: Hierarchical and Fine-grained Concept-Based Explanation for Convolutional Neural Networks

• URL: http://arxiv.org/abs/2509.18147v1
• Date: Tue, 16 Sep 2025 03:02:46 GMT
• Title: ConceptFlow: Hierarchical and Fine-grained Concept-Based Explanation for Convolutional Neural Networks
• Authors: Xinyu Mu, Hui Dou, Furao Shen, Jian Zhao,
• Abstract summary: Concept-based interpretability for Convolutional Neural Networks (CNNs) aims to align internal model representations with high-level semantic concepts.<n>We propose ConceptFlow, a concept-based interpretability framework that simulates the internal "thinking path" of a model.
• Score: 14.365259717799034
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Concept-based interpretability for Convolutional Neural Networks (CNNs) aims to align internal model representations with high-level semantic concepts, but existing approaches largely overlook the semantic roles of individual filters and the dynamic propagation of concepts across layers. To address these limitations, we propose ConceptFlow, a concept-based interpretability framework that simulates the internal "thinking path" of a model by tracing how concepts emerge and evolve across layers. ConceptFlow comprises two key components: (i) concept attentions, which associate each filter with relevant high-level concepts to enable localized semantic interpretation, and (ii) conceptual pathways, derived from a concept transition matrix that quantifies how concepts propagate and transform between filters. Together, these components offer a unified and structured view of internal model reasoning. Experimental results demonstrate that ConceptFlow yields semantically meaningful insights into model reasoning, validating the effectiveness of concept attentions and conceptual pathways in explaining decision behavior. By modeling hierarchical conceptual pathways, ConceptFlow provides deeper insight into the internal logic of CNNs and supports the generation of more faithful and human-aligned explanations.

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