arXiv Computer Vision

LEVI: Benchmarking Visual Identity Fidelity with Verifiable Low-Entropy Constructs

arXiv Computer Vision
Sep 4

Persistent Identity Preservation in Generative Image Models: A Benchmark and Evaluation System

The paper introduces a benchmark and evaluation system for measuring how well generative image models preserve the identity of a subject across generation, editing, restoration, and multi‑subject scenarios. It compares three paradigms—input context, trainable subject‑specific parameters, and a persistent identity layer—showing that persistent identity consistently improves fidelity while keeping image quality and instruction adherence high. The study finds that identity preservation remains a distinct limitation of current foundation models, especially under iterative edits, small scales, severe degradation, and multi‑subject composition.

By Mengwei Ren, Xuaner Zhang, Zhihao Xia
arXiv Computer Vision
Oct 2

Anti-Persona: Disrupting Unauthorized Identity Binding and Recognition in Personalized Vision--Language Models

The paper introduces Anti-Persona, an image-level defense that prevents unauthorized identity binding and recognition in personalized vision–language models. By aggregating visual features from multiple reference images into an identity prototype and applying subtle perturbations, the method disrupts prototype alignment in the vision‑encoder space while maintaining visual fidelity. Experiments on two personalized LVLMs show protection rates up to 95.0% and robustness across prompt variations and encoder mismatches.

By Abhishek Basu, Fahad Shamshad, Karthik Nandakumar
Hugging Face Trending Papers
Oct 5

Certification of Real Images through Calibrated Content Authentication

The paper examines the reliability of deepfake detectors, noting a decline in accuracy from 99.5% to 76% over four years and a drastic drop below 2% when adversarial perturbations are applied. It argues that content alone cannot determine provenance because generators can perfectly reproduce authentic images, so a new detection approach is proposed that certifies authenticity only if a generator cannot faithfully reconstruct the content. The authors demonstrate that their calibrated detector can limit false certifications to 1% while maintaining robustness against bounded‑perturbation attacks, though it struggles with arbitrary transformations.

arXiv Computer Vision
Oct 8

Certification of Real Images through Calibrated Content Authentication

The paper evaluates twenty deepfake detectors against ten recent generators, finding that accuracy has dropped from 99.5% to 76% and that adversarial perturbations can reduce detector performance to below 2%. It proposes a new detection paradigm that certifies authenticity only when a faithful reconstruction by a known generator is impossible, and shows that this calibrated detector can limit false certifications to at most 1% while remaining robust to bounded‑perturbation attacks. The study also highlights the erosion of post‑hoc verifiability, noting that newer generators can reproduce a larger fraction of previously unreplicable images.

By Sarim Hashmi, Abdelrahman Elsayed, Mohammed Talha Alam, Samuele Poppi, Nils Lukas
arXiv Computer Vision
1d ago

IDPrior: Decoupling Identity Generation from Facial Image Synthesis

IDPrior introduces a two-stage framework that separates identity generation from facial image synthesis. First, it learns a diffusion prior in the embedding space of a pretrained face recognition model to model and generate novel identity embeddings. These embeddings then condition a pretrained identity-conditioned diffusion model to synthesize multiple images of the same identity, producing diverse and well-separated identities that align closely with authentic identity distributions.

By Fadi Boutros, Meri\c{c} Demir\"ors, Darian Toma\v{s}evi\'c, Vitomir \v{S}truc, Naser Damer