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