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Javier Andreu-Perez

4 papers indexed

arxivcs.DCcs.AI2026-07-22

A Framework for Reputation Aware Uninorm-driven Consensus Algorithms for Blockchain Networks

Bruno Ramos-Cruz, Javier Andreu-Perez, David Richerby, Luis Martínez

The operation of blockchain is governed by consensus algorithms (CA). Several consensus mechanisms require significant computational power, while others necessitate high amounts of stakes to select the participant to validate and verify the transactions in the block, leading to c…

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arxivcs.LG2026-07-22

Interpretable Fuzzy Rule-Based Regression Extension for Ex-Fuzzy Library

Cayan Deniz Kucuktopana, Javier Fumanal-Idocin, Richard Pitts, Javier Andreu-Perez

Machine learning models achieve high predictive accuracy in regression tasks, but their deployment in safety-critical and regulated domains requires interpretability. While fuzzy rule-based systems offer transparent, linguistically explicit interpretable models, Mamdani-style fuz…

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arxivcs.CVcs.HC2026-07-22

Factor-Informed Uncertainty Distillation for Gaze Estimation

Mohammadreza Jamalifard, Yaxiong Lei, Javier Fumanal Idocin, Parastoo Azizinezhad, Tom Foulsham, Javier Andreu-Perez

Deep gaze estimation works well in controlled capture but degrades in unconstrained settings, where systems must reject unreliable predictions. Single-pass uncertainty (e.g., heteroscedastic regression) infers uncertainty from pixels without explicit input-validity cues, while sa…

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arxivcs.CVcs.HC2026-06-29

Coordinate Singularities Break Conformal Coverage for Gaze and Head Pose

Mohammadreza Jamalifard, Yaxiong Lei, Parastoo Azizinezhad, Javier Andreu-Perez

Conformal prediction provides distribution-free reliability guarantees for vision systems, but these guarantees depend on how prediction errors are measured in the output space. Many vision tasks produce outputs on curved spaces (e.g. gaze directions on the sphere or 3D head rota…

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