ExplainabilitySafetyTransparencycs.CV
Locally Testing Model Detections for Semantic Global Concepts
Franz Motzkus, Georgii Mikriukov, Christian Hellert, Ute Schmid
May 27, 2024
xAI
3 citations
Key Takeaways
-
Testing AI systems requires connecting global patterns to individual decisions: The research shows that understanding how a model uses a concept overall (globally) is different from understanding how it applies that concept to specific cases (locally). This gap matters for safety-critical applications like autonomous vehicles, where you need to know not just that a model understands "pedestrians," but whether it correctly identifies pedestrians in each specific image.
-
Current methods for encoding concepts in AI models are incomplete: The study found "major differences in the local perception and usage of individual global concept encodings," suggesting that when developers teach AI systems to recognize semantic concepts, those concepts aren't being learned as thoroughly or consistently as assumed. This has implications for trusting AI systems in high-stakes decisions.
-
Pixel-level transparency can improve AI accountability: The proposed framework (glCA) can pinpoint exactly which parts of an image a model uses when applying a learned concept, providing "pixel-exact scoring." This level of detail helps testers and auditors verify whether models are making decisions based on appropriate information rather than spurious correlations.
-
Black-box AI systems need better testing frameworks: The research addresses a real gap in responsible AI—we currently lack adequate tools to thoroughly test whether deep neural networks actually understand the concepts they're supposed to recognize. Better testing methods are essential before deploying these systems in safety-critical domains.
Abstract
Ensuring the quality of black-box Deep Neural Networks (DNNs) has become ever more significant, especially in safety-critical domains such as automated driving. While global concept encodings generally enable a user to test a model for a specific concept, linking global concept encodings to the local processing of single network inputs reveals their strengths and limitations. Our proposed framework global-to-local Concept Attribution (glCA) uses approaches from local (why a specific prediction originates) and global (how a model works generally) eXplainable Artificial Intelligence (xAI) to test DNNs for a predefined semantical concept locally. The approach allows for conditioning local, post-hoc explanations on predefined semantic concepts encoded as linear directions in the model's latent space. Pixel-exact scoring concerning the global concept usage assists the tester in further understanding the model processing of single data points for the selected concept. Our approach has the advantage of fully covering the model-internal encoding of the semantic concept and allowing the localization of relevant concept-related information. The results show major differences in the local perception and usage of individual global concept encodings and demand for further investigations regarding obtaining thorough semantic concept encodings.
Paper Info
arXiv ID2405.17523
PublishedMay 27, 2024
RevisedMay 29, 2024
Citations
3
Relevance75%
VenuexAI
TypeJournalArticle
Categorycs.CV
Responsible AI Topics
ExplainabilitySafetyTransparency
Links
Citation data from Semantic Scholar