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Alexandra Gomez-Villa

3 papers indexed

arxivcs.CV2026-07-17

Do Vision Encoders Exhibit Human-like Color Thresholds?

Engy Ehab, Pablo Hernández-Cámara, Nahla Belal, Jesús Malo, Javier Vazquez-Corral, Alexandra Gomez-Villa

Understanding and characterizing human color perception is a longstanding research goal. One of the most traditional approaches is looking for the human color discrimination thresholds, the minimum chromatic differences perceptible to human observers. In recent years, deep neural…

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arxivcs.LGcs.AI2026-07-15

The SIGReg Objective as Variational Free Energy: A Theoretical Active-Inference Account of JEPA World Models

Fabio Arnez, Alexandra Gomez-Villa

Joint-Embedding Predictive Architectures (JEPAs) are the dominant design for latent world models, yet they are usually justified by empirical performance rather than a normative principle. We show that the choice of anti-collapse regulariser determines whether a JEPA's training o…

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arxivcs.CV2026-06-30

DriftScope: Measuring The Hidden Effects of Diffusion Model Adaptation

Héctor Laria, Yiping Han, Julian D. Santamaria, Kai Wang, Bogdan Raducanu, Joost van de Weijer, et al.

Adapting pre-trained text-to-image diffusion models, whether to learn new visual concepts or erase unwanted ones, is routinely evaluated on its intended effects alone. We argue this framing is incomplete. Through sparse autoencoder analysis and zero-shot classification, we demons…

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