Home

Awesome

Hallu-PI

The code and datasets of our ACM MM 2024 paper "Hallu-PI: Evaluating Hallucination in Multi-modal Large Language Models within Perturbed Inputs".

ACMMM 2024 Multi-modal Large Language Models Hallucination Evaluation Perturbed Inputs

<div style="text-align:center"> <img src="assets/perturbed_examples.png" style="width:100%"/> <p><em>Some examples of hallucinations in MLLMs with perturbed inputs (such as image concatenation, image cropping, and prompt misleading). Text highlighted in green and red represents correct and hallucinatory content, respectively.</em></p> </div>

Updates

Abstract

Multi-modal Large Language Models (MLLMs) have demonstrated remarkable performance on various visual-language understanding and generation tasks. However, MLLMs occasionally generate content inconsistent with the given images, which is known as "hallucination". Prior works primarily center on evaluating hallucination using standard, unperturbed benchmarks, which overlook the prevalent occurrence of perturbed inputs in real-world scenariosā€”such as image cropping or blurringā€”that are critical for a comprehensive assessment of MLLMs' hallucination. In this paper, to bridge this gap, we propose Hallu-PI, the first benchmark designed to evaluate Hallucination in MLLMs within Perturbed Inputs. Specifically, Hallu-PI consists of seven perturbed scenarios, containing 1,260 perturbed images from 11 object types. Each image is accompanied by detailed annotations, which include fine-grained hallucination types, such as existence, attribute, and relation. We equip these annotations with a rich set of questions, making Hallu-PI suitable for both discriminative and generative tasks. Extensive experiments on 12 mainstream MLLMs, such as GPT-4V and Gemini-Pro Vision, demonstrate that these models exhibit significant hallucinations on Hallu-PI, which is not observed in unperturbed scenarios. Furthermore, our research reveals a severe bias in MLLMsā€™ ability to handle different types of hallucinations. We also design two baselines specifically for perturbed scenarios, namely Perturbed-Reminder and Perturbed-ICL. We hope that our study will bring researchersā€™ attention to the limitations of MLLMs when dealing with perturbed inputs, and spur further investigations to address this issue.

Contact

If you have any questions about our work, please feel free to contact us via the following email:

Peng Ding: dingpeng@smail.nju.edu.cn

Jingyu Wu: wujingyu@zju.edu.cn

Jun Kuang: jkuang@stu.ecnu.edu.cn

Citation

If you find this work useful in your own research, please feel free to leave a starā­ļø and cite our paper:

@misc{ding2024hallu,
      title={Hallu-PI: Evaluating Hallucination in Multi-modal Large Language Models within Perturbed Inputs}, 
      author={Ding, Peng and Wu, Jingyu and Kuang, Jun and Ma, Dan and Cao, Xuezhi and Cai, Xunliang and Chen, Shi and Chen, Jiajun and Huang, Shujian},
      year={2024},
      eprint={2408.01355},
      archivePrefix={arXiv},
      primaryClass={cs.CV}
}