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Varun Sharma

2 papers indexed

arxivcs.CRcs.AI2026-07-03

TIER: Trajectory-Invariant Explanation Regularization for Membership Privacy

Varun Sharma, Kar Wai Fok, Vrizlynn L. L. Thing

Explainability is central to building trustworthy AI, yet explanation interfaces can inadvertently provide adversaries with an expanded privacy-related attack surfaces. Recent studies show that advanced membership-inference attacks succeed by exploiting confidence-drop trajectori…

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arxivcs.CVcs.AIcs.GRcs.HCcs.MM2026-06-26

STAG: Spatio-temporal Evolving Structural Representation of Action Units for Micro-expression Recognition

Nandani Sharma, Varun Sharma, Dinesh Singh

Micro-expression recognition is challenging due to subtle and short-lived facial muscle movements. Existing methods rely heavily on apex-onset frames, overlook fine-grained inter-frame dynamics, and separately model spatial and temporal information, limiting generalization across…

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