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An accurate depth map of the environment is critical to the safe operation of autonomous robots and vehicles. Currently, either light detection and ranging (LIDAR) or stereo matching algorithms are used to acquire such depth information.…

In this letter, we propose a color-assisted robust framework for accurate LiDAR odometry and mapping (LOAM). Simultaneously receiving data from both the LiDAR and the camera, the framework utilizes the color information from the camera…

Robotics · Computer Science 2025-02-25 Yufei Lu , Yuetao Li , Zhizhou Jia , Qun Hao , Shaohui Zhang

Speckle artifacts degrade image quality in virtually all modalities that utilize coherent energy, including optical coherence tomography, reflectance confocal microscopy, ultrasound, and widefield imaging with laser illumination. We present…

Computer Vision and Pattern Recognition · Computer Science 2019-07-01 Taylor L. Bobrow , Faisal Mahmood , Miguel Inserni , Nicholas J. Durr

We present a method that decomposes, or "unwraps", an input video into a set of layered 2D atlases, each providing a unified representation of the appearance of an object (or background) over the video. For each pixel in the video, our…

Computer Vision and Pattern Recognition · Computer Science 2021-09-24 Yoni Kasten , Dolev Ofri , Oliver Wang , Tali Dekel

Low light very likely leads to the degradation of an image's quality and even causes visual task failures. Existing image enhancement technologies are prone to overenhancement, color distortion or time consumption, and their adaptability is…

Image and Video Processing · Electrical Eng. & Systems 2022-05-17 Xiaozhou Lei , Zixiang Fei , Wenju Zhou , Huiyu Zhou , Minrui Fei

Monocular depth estimation (MDE) aims to infer per-pixel depth from a single RGB image. While diffusion models have advanced MDE with impressive generalization, they often exhibit limitations in accurately reconstructing far-range regions.…

Computer Vision and Pattern Recognition · Computer Science 2025-11-18 Mingxia Zhan , Li Zhang , Yingjie Wang , Xiaomeng Chu , Beibei Wang , Yanyong Zhang

Linguistic steganography (LS) aims to embed secret information into a highly encoded text for covert communication. It can be roughly divided to two main categories, i.e., modification based LS (MLS) and generation based LS (GLS). Unlike…

Cryptography and Security · Computer Science 2023-02-17 Tianyu Yang , Hanzhou Wu , Biao Yi , Guorui Feng , Xinpeng Zhang

Monocular depth estimation is a critical function in computer vision applications. This paper shows that large language models (LLMs) can effectively interpret depth with minimal supervision, using efficient resource utilization and a…

Computer Vision and Pattern Recognition · Computer Science 2024-09-04 Zhongyi Xia , Tianzhao Wu

Depth estimation from a single image of a conventional camera is a challenging task since depth cues are lost during the acquisition process. State-of-the-art approaches improve the discrimination between different depths by introducing a…

Computer Vision and Pattern Recognition · Computer Science 2023-09-18 Jhon Lopez , Edwin Vargas , Henry Arguello

Reconstruction of high-definition maps is a crucial task in perceiving the autonomous driving environment, as its accuracy directly impacts the reliability of prediction and planning capabilities in downstream modules. Current vectorized…

Computer Vision and Pattern Recognition · Computer Science 2025-03-10 Haotian Hu , Jingwei Xu , Fanyi Wang , Toyota Li , Yaonong Wang , Laifeng Hu , Zhiwang Zhang

Large decoder-only language models (LLMs) are the state-of-the-art models on most of today's NLP tasks and benchmarks. Yet, the community is only slowly adopting these models for text embedding tasks, which require rich contextualized…

Computation and Language · Computer Science 2024-08-23 Parishad BehnamGhader , Vaibhav Adlakha , Marius Mosbach , Dzmitry Bahdanau , Nicolas Chapados , Siva Reddy

Current deep learning methods for low-light image enhancement (LLIE) typically rely on pixel-wise mapping learned from paired data. However, these methods often overlook the importance of considering degradation representations, which can…

Computer Vision and Pattern Recognition · Computer Science 2023-07-28 Tao Wang , Kaihao Zhang , Ziqian Shao , Wenhan Luo , Bjorn Stenger , Tae-Kyun Kim , Wei Liu , Hongdong Li

Multimodal Large Language Models (MLLMs) demonstrate a complex understanding of scenes, benefiting from large-scale and high-quality datasets. Most existing caption datasets lack the ground locations and relations for visual entities.…

Computer Vision and Pattern Recognition · Computer Science 2025-07-01 Xiangtai Li , Tao Zhang , Yanwei Li , Haobo Yuan , Shihao Chen , Yikang Zhou , Jiahao Meng , Yueyi Sun , Shilin Xu , Lu Qi , Tianheng Cheng , Yi Lin , Zilong Huang , Wenhao Huang , Jiashi Feng , Guang Shi

Background objects occluded in some views of a light field (LF) camera can be seen by other views. Consequently, occluded surfaces are possible to be reconstructed from LF images. In this paper, we handle the LF de-occlusion (LF-DeOcc)…

Computer Vision and Pattern Recognition · Computer Science 2019-12-11 Yingqian Wang , Tianhao Wu , Jungang Yang , Longguang Wang , Wei An , Yulan Guo

This paper presents a low complexity video coding method based on Underdetermined Blind Signal Separation (UBSS). The detailed coding framework is designed. Three key techniques are proposed to enhance the compression ratio and the quality…

Multimedia · Computer Science 2014-05-26 Jing Liu , Fei Qiao , Zhijian Ou , Huazhong Yang

Consistent and natural camera lens blur is important for seamlessly blending 3D virtual objects into photographed real-scenes. Since lens blur typically varies with scene depth, the placement of virtual objects and their corresponding blur…

Computer Vision and Pattern Recognition · Computer Science 2025-11-24 Lingyan Ruan , Bin Chen , Taehyun Rhee

Visual encoding constitutes the basis of large multimodal models (LMMs) in understanding the visual world. Conventional LMMs process images in fixed sizes and limited resolutions, while recent explorations in this direction are limited in…

Computer Vision and Pattern Recognition · Computer Science 2024-03-19 Ruyi Xu , Yuan Yao , Zonghao Guo , Junbo Cui , Zanlin Ni , Chunjiang Ge , Tat-Seng Chua , Zhiyuan Liu , Maosong Sun , Gao Huang

Transforming a large language model (LLM) into a Vision-Language Model (VLM) can be achieved by mapping the visual tokens from a vision encoder into the embedding space of an LLM. Intriguingly, this mapping can be as simple as a shallow MLP…

Computer Vision and Pattern Recognition · Computer Science 2026-02-26 Benno Krojer , Shravan Nayak , Oscar Mañas , Vaibhav Adlakha , Desmond Elliott , Siva Reddy , Marius Mosbach

Currently, video transmission serves not only the Human Visual System (HVS) for viewing but also machine perception for analysis. However, existing codecs are primarily optimized for pixel-domain and HVS-perception metrics rather than the…

Image and Video Processing · Electrical Eng. & Systems 2025-03-28 Yuxiao Sun , Yao Zhao , Meiqin Liu , Chao Yao , Weisi Lin

Low-dose computed tomography (LDCT) offers reduced X-ray radiation exposure but at the cost of compromised image quality, characterized by increased noise and artifacts. Recently, transformer models emerged as a promising avenue to enhance…

Image and Video Processing · Electrical Eng. & Systems 2023-10-20 Dayang Wang , Yongshun Xu , Shuo Han , Zhan Wu , Li Zhou , Bahareh Morovati , Hengyong Yu