[Submitted on 1 Sep 2026]
Title:Don't Just Look, Intervene: Perturbation Based Region Labeling for VQA Images
View a PDF of the paper titled Don't Just Look, Intervene: Perturbation Based Region Labeling for VQA Images, by Marko Jojic and 2 other authors
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Abstract:Vision Language Models (VLMs) should rely on visual evidence that directly determines the correct answer, but supervision for grounding visual reasoning is often expensive to obtain manually or tied to dataset-specific annotation primitives. We instead introduce model-causal visual evidence as an annotation target, defined as the set of image regions whose counterfactual intervention changes a model's answer distribution for a given image-question pair. Based on this principle, we introduce Counterfactual Search for Grounding Regions (CSGR). CSGR is a scalable pipeline that proposes candidate regions, perturbs them, measures their effect on answer sensitivity, and aggregates this evidence across multiple judges to approximate answer-critical regions in VQA data. To assess whether CSGR annotations contain a useful supervision signal, we plug them into three existing grounding-aware training routines: attention steering, Visual CoTfinetuning, and latent visual reasoning. These experiments test whether the proposed annotation scheme can provide a useful supervision signal across multiple ways of consuming region labels, rather than introducing a new way of using them. Across competing automatic region-labeling mechanisms, CSGR annotations provide the most consistent gains over Cross Entropy-only finetuning in both in-domain and out-of-domain evaluations, indicating that the proposed labeling scheme captures useful region-level information.
Subjects:
Computer Vision and Pattern Recognition (cs.CV)
Cite as: arXiv:2609.13228 [cs.CV]
(or arXiv:2609.13228v1 [cs.CV] for this version)
https://doi.org/10.48550/arXiv.2609.13228
arXiv-issued DOI via DataCite
Submission history
From: Marko Jojic [view email] [v1] Tue, 1 Sep 2026 20:56:09 UTC (9,541 KB)
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