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Multi-modal methods based on camera and LiDAR sensors have garnered significant attention in the field of 3D detection. However, many prevalent works focus on single or partial stage fusion, leading to insufficient feature extraction and…

Computer Vision and Pattern Recognition · Computer Science 2025-08-19 Zhiwei Ning , Zhaojiang Liu , Xuanang Gao , Yifan Zuo , Jie Yang , Yuming Fang , Wei Liu

The Jaccard index, also known as Intersection-over-Union (IoU score), is one of the most critical evaluation metrics in medical image segmentation. However, directly optimizing the mean IoU (mIoU) score over multiple objective classes is an…

Computer Vision and Pattern Recognition · Computer Science 2020-11-04 Zhibin Li , Litao Yu , Jian Zhang

Intersection over Union (IoU) losses are surrogates that directly optimize the Jaccard index. Leveraging IoU losses as part of the loss function have demonstrated superior performance in semantic segmentation tasks compared to optimizing…

Computer Vision and Pattern Recognition · Computer Science 2024-03-21 Zifu Wang , Xuefei Ning , Matthew B. Blaschko

Bounding boxes uniquely characterize object detection, where a good detector gives accurate bounding boxes of categories of interest. However, in the real-world where test ground truths are not provided, it is non-trivial to find out…

Computer Vision and Pattern Recognition · Computer Science 2024-03-21 Yang Yang , Wenhai Wang , Zhe Chen , Jifeng Dai , Liang Zheng

Existing Multiple Object Tracking (MOT) methods design complex architectures for better tracking performance. However, without a proper organization of input information, they still fail to perform tracking robustly and suffer from frequent…

Computer Vision and Pattern Recognition · Computer Science 2022-12-07 Bisheng Wang , Horst Possegger , Horst Bischof , Guo Cao

Loss functions is a crucial factor that affecting the detection precision in object detection task. In this paper, we optimize both two loss functions for classification and localization simultaneously. Firstly, by multiplying an IoU-based…

Computer Vision and Pattern Recognition · Computer Science 2021-08-02 Shang Jiang , Haoran Qin , Bingli Zhang , Jieyu Zheng

The increasing size and complexity of scientific data could dramatically enhance discovery and prediction for basic scientific applications. Realizing this potential, however, requires novel statistical analysis methods that are both…

Label assignment plays a significant role in modern object detection models. Detection models may yield totally different performances with different label assignment strategies. For anchor-based detection models, the IoU (Intersection over…

Computer Vision and Pattern Recognition · Computer Science 2022-09-20 Tianxiao Zhang , Bo Luo , Ajay Sharda , Guanghui Wang

The Jaccard index, also referred to as the intersection-over-union score, is commonly employed in the evaluation of image segmentation results given its perceptual qualities, scale invariance - which lends appropriate relevance to small…

Computer Vision and Pattern Recognition · Computer Science 2018-04-10 Maxim Berman , Amal Rannen Triki , Matthew B. Blaschko

Without densely tiled anchor boxes or grid points in the image, sparse R-CNN achieves promising results through a set of object queries and proposal boxes updated in the cascaded training manner. However, due to the sparse nature and the…

Computer Vision and Pattern Recognition · Computer Science 2022-10-06 Jing Zhao , Shengjian Wu , Li Sun , Qingli Li

Two-stage deep object detectors generate a set of regions-of-interest (RoI) in the first stage, then, in the second stage, identify objects among the proposed RoIs that sufficiently overlap with a ground truth (GT) box. The second stage is…

Computer Vision and Pattern Recognition · Computer Science 2020-06-22 Kemal Oksuz , Baris Can Cam , Emre Akbas , Sinan Kalkan

Most existing point cloud based 3D object detectors focus on the tasks of classification and box regression. However, another bottleneck in this area is achieving an accurate detection confidence for the Non-Maximum Suppression (NMS)…

Computer Vision and Pattern Recognition · Computer Science 2020-04-13 Jiale Li , Shujie Luo , Ziqi Zhu , Hang Dai , Andrey S. Krylov , Yong Ding , Ling Shao

Current motion-based multiple object tracking (MOT) approaches rely heavily on Intersection-over-Union (IoU) for object association. Without using 3D features, they are ineffective in scenarios with occlusions or visually similar objects.…

Computer Vision and Pattern Recognition · Computer Science 2025-06-03 Milad Khanchi , Maria Amer , Charalambos Poullis

Object detection is a comprehensively studied problem in autonomous driving. However, it has been relatively less explored in the case of fisheye cameras. The standard bounding box fails in fisheye cameras due to the strong radial…

Computer Vision and Pattern Recognition · Computer Science 2022-12-23 Hazem Rashed , Eslam Mohamed , Ganesh Sistu , Varun Ravi Kumar , Ciaran Eising , Ahmad El-Sallab , Senthil Yogamani

The ambiguity at the boundaries of different semantic classes in point cloud semantic segmentation often leads to incorrect decisions in intelligent perception systems, such as autonomous driving. Hence, accurate delineation of the…

Computer Vision and Pattern Recognition · Computer Science 2024-11-12 Jiale Chen , Fei Xia , Jianliang Mao , Haoping Wang , Chuanlin Zhang

As scene segmentation systems reach visually accurate results, many recent papers focus on making these network architectures faster, smaller and more efficient. In particular, studies often aim at designingreal-time'systems. Achieving this…

Computer Vision and Pattern Recognition · Computer Science 2022-04-21 Evann Courdier , Francois Fleuret

In this paper, we introduce the Union-Intersection Union-Find (UIUF) algorithm for decoding depolarizing errors in topological codes, combining the strengths of iterative and standard Union-Find (UF) decoding. While iterative UF improves…

Quantum Physics · Physics 2025-07-14 Tzu-Hao Lin , Ching-Yi Lai

Road object detection is an important branch of automatic driving technology, The model with higher detection accuracy is more conducive to the safe driving of vehicles. In road object detection, the omission of small objects and occluded…

Computer Vision and Pattern Recognition · Computer Science 2023-02-17 Tao Yang , Youyu Wu , Yangxintai Tang

The localization quality of automatic object detectors is typically evaluated by the Intersection over Union (IoU) score. In this work, we show that humans have a different view on localization quality. To evaluate this, we conduct a survey…

Computer Vision and Pattern Recognition · Computer Science 2022-07-29 Ombretta Strafforello , Vanathi Rajasekart , Osman S. Kayhan , Oana Inel , Jan van Gemert

Deep learning-based object detection and instance segmentation have achieved unprecedented progress. In this paper, we propose Complete-IoU (CIoU) loss and Cluster-NMS for enhancing geometric factors in both bounding box regression and…

Computer Vision and Pattern Recognition · Computer Science 2021-07-06 Zhaohui Zheng , Ping Wang , Dongwei Ren , Wei Liu , Rongguang Ye , Qinghua Hu , Wangmeng Zuo