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Large Vision-Language Models (LVLMs) often produce responses that misalign with factual information, a phenomenon known as hallucinations. While hallucinations are well-studied, the exact causes behind them remain underexplored. In this…

Computer Vision and Pattern Recognition · Computer Science 2025-03-07 Sreyan Ghosh , Chandra Kiran Reddy Evuru , Sonal Kumar , Utkarsh Tyagi , Oriol Nieto , Zeyu Jin , Dinesh Manocha

Multimodal Large Language Models (MLLMs) have made rapid progress in single-video understanding, yet their ability to reason across multiple independent video streams remains poorly understood. Existing multi-video benchmarks rely largely…

Computer Vision and Pattern Recognition · Computer Science 2026-05-12 Sara Ghazanfari , Siddharth Garg , Prashanth Krishnamurthy , Farshad Khorrami

Reasoning segmentation aims to segment target objects in complex scenes based on human intent and spatial reasoning. While recent multimodal large language models (MLLMs) have demonstrated impressive 2D image reasoning segmentation,…

Computer Vision and Pattern Recognition · Computer Science 2025-11-11 Jiaxin Huang , Runnan Chen , Ziwen Li , Zhengqing Gao , Xiao He , Yandong Guo , Mingming Gong , Tongliang Liu

Prior studies on 3D scene understanding have primarily developed specialized models for specific tasks or required task-specific fine-tuning. In this study, we propose Grounded 3D-LLM, which explores the potential of 3D large multi-modal…

Computer Vision and Pattern Recognition · Computer Science 2024-11-19 Yilun Chen , Shuai Yang , Haifeng Huang , Tai Wang , Runsen Xu , Ruiyuan Lyu , Dahua Lin , Jiangmiao Pang

3D visual grounding is the ability to localize objects in 3D scenes conditioned by utterances. Most existing methods devote the referring head to localize the referred object directly, causing failure in complex scenarios. In addition, it…

Computer Vision and Pattern Recognition · Computer Science 2024-10-08 Eslam Abdelrahman , Mohamed Ayman , Mahmoud Ahmed , Habib Slim , Mohamed Elhoseiny

Traditional visual grounding methods primarily focus on single-image scenarios with simple textual references. However, extending these methods to real-world scenarios that involve implicit and complex instructions, particularly in…

Computer Vision and Pattern Recognition · Computer Science 2025-05-21 Sule Bai , Mingxing Li , Yong Liu , Jing Tang , Haoji Zhang , Lei Sun , Xiangxiang Chu , Yansong Tang

We present SpinBench, a cognitively grounded diagnostic benchmark for evaluating spatial reasoning in vision language models (VLMs). SpinBench is designed around the core challenge of spatial reasoning: perspective taking, the ability to…

Computer Vision and Pattern Recognition · Computer Science 2026-03-03 Yuyou Zhang , Radu Corcodel , Chiori Hori , Anoop Cherian , Ding Zhao

360 panoramic images are increasingly used in virtual reality, autonomous driving, and robotics for holistic scene understanding. However, current Vision-Language Models (VLMs) struggle with 3D spatial reasoning on Equirectangular…

Computer Vision and Pattern Recognition · Computer Science 2026-02-26 Zekai Lin , Xu Zheng

Visual Language Models (VLMs) have increasingly become the main paradigm for understanding indoor scenes, but they still struggle with metric and spatial reasoning. Current approaches rely on end-to-end video understanding or large-scale…

Computer Vision and Pattern Recognition · Computer Science 2026-03-17 Fernando Ropero , Erkin Turkoz , Daniel Matos , Junqing Du , Antonio Ruiz , Yanfeng Zhang , Lu Liu , Mingwei Sun , Yongliang Wang

Spatial Reasoning is an important component of human cognition and is an area in which the latest Vision-language models (VLMs) show signs of difficulty. The current analysis works use image captioning tasks and visual question answering.…

Computation and Language · Computer Science 2025-11-11 Akshar Tumu , Varad Shinde , Parisa Kordjamshidi

We study long-horizon planning in 3D environments from under-specified natural-language goals using only visual observations, focusing on multi-step 3D box rearrangement tasks. Existing approaches typically rely on symbolic planners with…

Artificial Intelligence · Computer Science 2026-03-26 Ashish Malik , Caleb Lowe , Aayam Shrestha , Stefan Lee , Fuxin Li , Alan Fern

While Multimodal Large Language Models (MLLMs) have achieved impressive performance on semantic tasks, their spatial intelligence--crucial for robust and grounded AI systems--remains underdeveloped. Existing benchmarks fall short of…

Computer Vision and Pattern Recognition · Computer Science 2025-12-30 Mingrui Wu , Zhaozhi Wang , Fangjinhua Wang , Jiaolong Yang , Marc Pollefeys , Tong Zhang

Recent advances in Multi-modal Large Language Models (MLLMs) have showcased remarkable capabilities in vision-language understanding. However, enabling robust video spatial reasoning-the ability to comprehend object locations, orientations,…

Computer Vision and Pattern Recognition · Computer Science 2025-11-18 Haoran Tang , Meng Cao , Ruyang Liu , Xiaoxi Liang , Linglong Li , Ge Li , Xiaodan Liang

Answering questions about the spatial properties of the environment poses challenges for existing language and vision foundation models due to a lack of understanding of the 3D world notably in terms of relationships between objects. To…

Computer Vision and Pattern Recognition · Computer Science 2024-09-17 Emilia Szymanska , Mihai Dusmanu , Jan-Willem Buurlage , Mahdi Rad , Marc Pollefeys

Precise spatial understanding from multi-view images remains a fundamental challenge for Multimodal Large Language Models (MLLMs), as their visual representations are predominantly semantic and lack explicit geometric grounding. While…

Computer Vision and Pattern Recognition · Computer Science 2026-03-25 Chanyoung Gwak , Yoonwoo Jeong , Byungwoo Jeon , Hyunseok Lee , Jinwoo Shin , Minsu Cho

Recent advances in LVLMs have improved vision-language understanding, but they still struggle with spatial perception, limiting their ability to reason about complex 3D scenes. Unlike previous approaches that incorporate 3D representations…

Computer Vision and Pattern Recognition · Computer Science 2026-01-13 Jiahui Zhang , Yurui Chen , Yanpeng Zhou , Yueming Xu , Ze Huang , Jilin Mei , Junhui Chen , Yu-Jie Yuan , Xinyue Cai , Guowei Huang , Xingyue Quan , Hang Xu , Li Zhang

LiDAR sensors play a crucial role in various applications, especially in autonomous driving. Current research primarily focuses on optimizing perceptual models with point cloud data as input, while the exploration of deeper cognitive…

Computer Vision and Pattern Recognition · Computer Science 2024-05-27 Yuhang Liu , Boyi Sun , Guixu Zheng , Yishuo Wang , Jing Wang , Fei-Yue Wang

Recent advances in Multimodal Large Language Models (MLLMs) have enabled autonomous agents to interact with computers via Graphical User Interfaces (GUIs), where accurately localizing the coordinates of interface elements (e.g., buttons) is…

Machine Learning · Computer Science 2025-05-27 Hyunseok Lee , Jeonghoon Kim , Beomjun Kim , Jihoon Tack , Chansong Jo , Jaehong Lee , Cheonbok Park , Sookyo In , Jinwoo Shin , Kang Min Yoo

This paper tackles the challenging task of 3D visual grounding-locating a specific object in a 3D point cloud scene based on text descriptions. Existing methods fall into two categories: top-down and bottom-up methods. Top-down methods rely…

Computer Vision and Pattern Recognition · Computer Science 2024-10-22 Yang Liu , Daizong Liu , Wei Hu

Vision Language Models (VLMs) exhibit persistent hallucinations in counting tasks, with accuracy substantially lower than other visual reasoning tasks (excluding sentiment). This phenomenon persists even in state-of-the-art…

Computer Vision and Pattern Recognition · Computer Science 2026-03-12 Boyuan Chen , Minghao Shao , Siddharth Garg , Ramesh Karri , Muhammad Shafique