OmniQuery: Contextually Augmenting Captured Multimodal Memories to Enable Personal Question Answering

Jiahao Nick Li1, Zhuohao (Jerry) Zhang2, Jiaju Ma3
UCLA1, Univeristy of Washington2, Stanford University3
ACM CHI 2025 Paper
arXiv Paper Video Code
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OmniQuery enables free-form question answering on personal memories (i.e., private data in albums) with RAG. Specifically, it applies contextual data augmentation (taxonomy-based) to enhance the retrieval accuracy, and uses LLMs to generate answers based on the retrieved memory instances.

Exemplar Personal Questions

OmniQuery enables answering questions that require multi-hop searching and reasoning over personal memories. Here are some examples of the questions that OmniQuery can answer:

Look Up and Locate

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Example 1: Look up the memories of a friend's wedding and locate information about the venue; Example 2: Find the last memory of vet visit.

Exploratary Search

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Example 3: Recall the travel experience.

Summarize and Compare

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Example 4: Summarize and compare workout frequency.

Implementation

OmniQuery leverages Retrieval-Augmented Generation (RAG) to answer complex personal questions on large amount of personal memory.

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Specifically, the accurate retrieval of relevant memories is crucial for the performance of the system. To this end, we propose a novel taxonomy-based contextual data augmentation method to enhance the retrieval accuracy. The taxonomy is generated based on a one-month diary study, which collects realistic user queries and the necessary contextual information for integrating with captured memories. The taxonomy is then used to augment the captured memories with contextual information, which is used to retrieve relevant memories. The retrieved memories are then used to generate answers to the user queries using a large language model (LLM). For more details, please refer to our paper.

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Full Video

BibTeX

@inproceedings{li2025omniquery,
author = {Li, Jiahao Nick and Zhang, Zhuohao (Jerry) and Ma, Jiaju},
title = {OmniQuery: Contextually Augmenting Captured Multimodal Memories to Enable Personal Question Answering},
year = {2025},
isbn = {9798400713941},
publisher = {Association for Computing Machinery},
address = {New York, NY, USA},
url = {https://doi.org/10.1145/3706598.3713448},
doi = {10.1145/3706598.3713448},
booktitle = {Proceedings of the 2025 CHI Conference on Human Factors in Computing Systems},
articleno = {635},
numpages = {20},
keywords = {personal memory, contextual augmentation, diary study, multimodal question answering, RAG},
location = {
},
series = {CHI '25}
}