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Spatial reasoning is a fundamental capability of multimodal large language models (MLLMs), yet their performance in open aerial environments remains underexplored. In this work, we present Open3D-VQA, a novel benchmark for evaluating MLLMs'…

Computer Vision and Pattern Recognition · Computer Science 2025-10-31 Weichen Zhang , Zile Zhou , Xin Zeng , Xuchen Liu , Jianjie Fang , Chen Gao , Yong Li , Jinqiang Cui , Xinlei Chen , Xiao-Ping Zhang

Recent 3D Large-Language Models (3D-LLMs) claim to understand 3D worlds, especially spatial relationships among objects. Yet, we find that simply fine-tuning a language model on text-only question-answer pairs can perform comparably or even…

Computation and Language · Computer Science 2026-03-26 Xianzheng Ma , Tao Sun , Shuai Chen , Yash Bhalgat , Jindong Gu , Angel X Chang , Iro Armeni , Iro Laina , Songyou Peng , Victor Adrian Prisacariu

The unprecedented advancements in Large Language Models (LLMs) have shown a profound impact on natural language processing but are yet to fully embrace the realm of 3D understanding. This paper introduces PointLLM, a preliminary effort to…

Computer Vision and Pattern Recognition · Computer Science 2024-09-10 Runsen Xu , Xiaolong Wang , Tai Wang , Yilun Chen , Jiangmiao Pang , Dahua Lin

Large Multimodal Models (LMMs) have achieved strong performance across a range of vision and language tasks. However, their spatial reasoning capabilities are under-investigated. In this paper, we construct a novel VQA dataset, Spatial-MM,…

Computer Vision and Pattern Recognition · Computer Science 2024-11-12 Fatemeh Shiri , Xiao-Yu Guo , Mona Golestan Far , Xin Yu , Gholamreza Haffari , Yuan-Fang Li

Vision-Language Models (VLMs) have been increasingly applied in real-world scenarios due to their outstanding understanding and reasoning capabilities. Although VLMs have already demonstrated impressive capabilities in common visual…

Computer Vision and Pattern Recognition · Computer Science 2026-02-25 Yuechen Xie , Xiaoyan Zhang , Yicheng Shan , Hao Zhu , Rui Tang , Rong Wei , Mingli Song , Yuanyu Wan , Jie Song

Recent advances in point cloud perception have demonstrated remarkable progress in scene understanding through vision-language alignment leveraging large language models (LLMs). However, existing methods may still encounter challenges in…

Computer Vision and Pattern Recognition · Computer Science 2025-07-01 Zhenhua Ning , Zhuotao Tian , Shaoshuai Shi , Guangming Lu , Daojing He , Wenjie Pei , Li Jiang

While Multimodal Large Language Models (MLLMs) demonstrate proficiency in 2D scenes, extending their perceptual intelligence to 3D point cloud understanding remains a significant challenge. Current approaches focus primarily on aligning 3D…

Computer Vision and Pattern Recognition · Computer Science 2026-03-02 Dongxu Zhang , Yiding Sun , Pengcheng Li , Yumou Liu , Hongqiang Lin , Haoran Xu , Xiaoxuan Mu , Liang Lin , Wenbiao Yan , Ning Yang , Chaowei Fang , Juanjuan Zhao , Jihua Zhu , Conghui He , Cheng Tan

Recent advancements in multimodal large language models (LLMs) have demonstrated significant potential across various domains, particularly in concept reasoning. However, their applications in understanding 3D environments remain limited,…

Computer Vision and Pattern Recognition · Computer Science 2025-02-11 Kuan-Chih Huang , Xiangtai Li , Lu Qi , Shuicheng Yan , Ming-Hsuan Yang

3D Visual Grounding (3DVG) focuses on locating objects in 3D scenes based on natural language descriptions, serving as a fundamental task for embodied AI and robotics. Recent advances in Multi-modal Large Language Models (MLLMs) have…

Computer Vision and Pattern Recognition · Computer Science 2025-12-02 Beining Xu , Siting Zhu , Zhao Jin , Junxian Li , Hesheng Wang

Recent advances in Large Multimodal Models (LMM) have made it possible for various applications in human-machine interactions. However, developing LMMs that can comprehend, reason, and plan in complex and diverse 3D environments remains a…

Computer Vision and Pattern Recognition · Computer Science 2023-12-01 Sijin Chen , Xin Chen , Chi Zhang , Mingsheng Li , Gang Yu , Hao Fei , Hongyuan Zhu , Jiayuan Fan , Tao Chen

Understanding and reasoning about spatial relationships is a fundamental capability for Visual Question Answering (VQA) and robotics. While Vision Language Models (VLM) have demonstrated remarkable performance in certain VQA benchmarks,…

Computer Vision and Pattern Recognition · Computer Science 2024-01-23 Boyuan Chen , Zhuo Xu , Sean Kirmani , Brian Ichter , Danny Driess , Pete Florence , Dorsa Sadigh , Leonidas Guibas , Fei Xia

Understanding 3D point clouds through language remains a fundamental challenge in computer graphics and visual computing, due to the irregular structure of point cloud data and the lack of explicit reasoning in existing 3D multimodal…

Computer Vision and Pattern Recognition · Computer Science 2026-05-22 Chaoqi Chen , Qile Xu , Wenjun Zhou , Hui Huang

Multi-modal large language models (MLLMs) have shown incredible capabilities in a variety of 2D vision and language tasks. We extend MLLMs' perceptual capabilities to ground and reason about images in 3-dimensional space. To that end, we…

Computer Vision and Pattern Recognition · Computer Science 2024-05-07 Jang Hyun Cho , Boris Ivanovic , Yulong Cao , Edward Schmerling , Yue Wang , Xinshuo Weng , Boyi Li , Yurong You , Philipp Krähenbühl , Yan Wang , Marco Pavone

Large language models (LLMs) and Vision-Language Models (VLMs) have been proven to excel at multiple tasks, such as commonsense reasoning. Powerful as these models can be, they are not grounded in the 3D physical world, which involves…

Computer Vision and Pattern Recognition · Computer Science 2023-07-25 Yining Hong , Haoyu Zhen , Peihao Chen , Shuhong Zheng , Yilun Du , Zhenfang Chen , Chuang Gan

Although large multi-modality models (LMMs) have seen extensive exploration and application in various quality assessment studies, their integration into Point Cloud Quality Assessment (PCQA) remains unexplored. Given LMMs' exceptional…

Computer Vision and Pattern Recognition · Computer Science 2024-08-07 Zicheng Zhang , Haoning Wu , Yingjie Zhou , Chunyi Li , Wei Sun , Chaofeng Chen , Xiongkuo Min , Xiaohong Liu , Weisi Lin , Guangtao Zhai

Spatial reasoning is a core aspect of human intelligence that allows perception, inference and planning in 3D environments. However, current vision-language models (VLMs) struggle to maintain geometric coherence and cross-view consistency…

Artificial Intelligence · Computer Science 2025-12-03 Qiyao Xue , Weichen Liu , Shiqi Wang , Haoming Wang , Yuyang Wu , Wei Gao

Enabling Large Language Models (LLMs) to interact with 3D environments is challenging. Existing approaches extract point clouds either from ground truth (GT) geometry or 3D scenes reconstructed by auxiliary models. Text-image aligned 2D…

Computer Vision and Pattern Recognition · Computer Science 2024-04-22 Tao Chu , Pan Zhang , Xiaoyi Dong , Yuhang Zang , Qiong Liu , Jiaqi Wang

The spatial reasoning task aims to reason about the spatial relationships in 2D and 3D space, which is a fundamental capability for Visual Question Answering (VQA) and robotics. Although vision language models (VLMs) have developed rapidly…

Computer Vision and Pattern Recognition · Computer Science 2025-07-29 Xun Liang , Xin Guo , Zhongming Jin , Weihang Pan , Penghui Shang , Deng Cai , Binbin Lin , Jieping Ye

3D spatial understanding is essential in real-world applications such as robotics, autonomous vehicles, virtual reality, and medical imaging. Recently, Large Language Models (LLMs), having demonstrated remarkable success across various…

Computer Vision and Pattern Recognition · Computer Science 2026-03-23 Jirong Zha , Yuxuan Fan , Xiao Yang , Chen Gao , Xinlei Chen

Multimodal large language models (MLLMs) have achieved significant progress in image and language tasks due to the strong reasoning capability of large language models (LLMs). Nevertheless, most MLLMs suffer from limited spatial reasoning…

Computer Vision and Pattern Recognition · Computer Science 2025-11-24 Jiajie Guo , Qingpeng Zhu , Jin Zeng , Xiaolong Wu , Changyong He , Weida Wang
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