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Hallucination In Object Detection -- A Study In Visual Part Verification

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arxiv 2106.02523 v1 pith:V7I2ZMEP submitted 2021-06-04 cs.CV cs.AIcs.LG

classification cs.CVcs.AIcs.LG
keywords partobjectverificationvisualdetectorsmissingannotateddelftbikes
verification ladder T0 review T1 audit T2 compute T3 formal
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We show that object detectors can hallucinate and detect missing objects; potentially even accurately localized at their expected, but non-existing, position. This is particularly problematic for applications that rely on visual part verification: detecting if an object part is present or absent. We show how popular object detectors hallucinate objects in a visual part verification task and introduce the first visual part verification dataset: DelftBikes, which has 10,000 bike photographs, with 22 densely annotated parts per image, where some parts may be missing. We explicitly annotated an extra object state label for each part to reflect if a part is missing or intact. We propose to evaluate visual part verification by relying on recall and compare popular object detectors on DelftBikes.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. The 3D Mirage: Probing and Taming 3D Hallucinations

    cs.CV 2025-12 reject novelty 6.0 of 10

    Depth models hallucinate 3D bumps on flat illusion images when context is cropped; the paper adds a benchmark, two scores, and a LoRA fine-tune that reduces the artifact on the same dataset.

  2. Data-Efficient Challenges in Visual Inductive Priors: A Retrospective

    cs.CV 2025-06 conditional novelty 3.0 of 10

    A retrospective of four data-limited computer vision challenges finds that ensembles and heavy augmentation, not novel inductive priors, drove winning performance.

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