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David Hall

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3 papers
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3

NeurIPS Conference 2025 Conference Paper

WearVQA: A Visual Question Answering Benchmark for Wearables in Egocentric Authentic Real-world scenarios

  • Eun Chang
  • Zhuangqun Huang
  • Yiwei Liao
  • Sagar Bhavsar
  • Amogh Param
  • Tammy Stark
  • Adel Ahmadyan
  • Xiao Yang

We introduce WearVQA, the first benchmark specifically designed to evaluate the visual questionanswering (VQA) capabilities of multi-modal AI assistant on wearable devices like smart glasses. Unlikeprior benchmarks that focus on high-quality, third-person imagery, WearVQA reflects the unique chal-lenges of ego-centric interaction—where visual inputs may be occluded, poorly lit, unzoomed, or blurry, and questions are grounded in realistic wearable use cases. The benchmark comprises 2, 500 carefullycurated image-question-answer triplets, spanning 7 diverse image domains including both text-centricand general scenes, 10 cognitive task types ranging from basic recognition to various forms of reasoning, and 6 common wearables-specific image quality issues. All questions are designed to be answerable usingonly the visual input and common senses. WearVQA is paired with a rigorous LLM-as-a-judge evaluationframework with 96% labeling accuracy. Open-source and proprietary multi-modal LLMs achieved a QAaccuracy as low as 24–52% on WearVQA, with substantial drops on lower-quality images and reasoning-heavy tasks. These observations position WearVQA as a comprehensive and challenging benchmark forguiding technicial advancement towards robust, real-world multi-modal wearables AI systems.

EAAI Journal 2021 Journal Article

Interpretable tropical cyclone intensity estimation using Dvorak-inspired machine learning techniques

  • Yu-Ju Lee
  • David Hall
  • Quan Liu
  • Wen-Wei Liao
  • Ming-Chun Huang

The intensity of a tropical cyclone is correlated strongly to the damage it causes when it makes landfall. Most of the time, tropical cyclones are located over the open ocean, where direct intensity measurements are difficult to obtain. An alternative approach is to estimate the tropical cyclone intensity indirectly from satellite images. In this case, there are two key points to consider: spatial and temporal relationships. For spatial relationships, the basic assumption is that cyclones with similar intensities have similar patterns. Thus, researchers can estimate intensity using pattern extraction and investigating similarities. For temporal relationships, the intensity of the cyclone is assumed to change smoothly, as a tropical cyclone is a continuous weather phenomenon. Thus, satellite images belonging to the same tropical cyclone should have a temporal (chronological) relationship with one another, meaning that the estimated intensity value of subsequent images should not change too drastically. In this research, we take advantage of these two key points and use random walk with a restart model to discover hidden correlations between target and historical cyclone images to estimate their intensity. We then use machine learning models to determine the temporal relationships among cyclone images, smoothing the prediction of the tropical cyclone event as a whole. Finally, our results show 15. 77-knot root-mean-square error (RMSE) for the intensity estimation of tropical cyclones in the West Pacific Basin area.