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We introduce R-Sparse R-CNN, a novel pipeline for oriented ship detection in Synthetic Aperture Radar (SAR) images that leverages sparse learnable proposals enriched with background contextual information, termed background-aware proposals…

Computer Vision and Pattern Recognition · Computer Science 2025-04-29 Kamirul Kamirul , Odysseas Pappas , Alin Achim

We present Sparse R-CNN, a purely sparse method for object detection in images. Existing works on object detection heavily rely on dense object candidates, such as $k$ anchor boxes pre-defined on all grids of image feature map of size…

Computer Vision and Pattern Recognition · Computer Science 2021-04-27 Peize Sun , Rufeng Zhang , Yi Jiang , Tao Kong , Chenfeng Xu , Wei Zhan , Masayoshi Tomizuka , Lei Li , Zehuan Yuan , Changhu Wang , Ping Luo

Common horizontal bounding box (HBB)-based methods are not capable of accurately locating slender ship targets with arbitrary orientations in synthetic aperture radar (SAR) images. Therefore, in recent years, methods based on oriented…

Computer Vision and Pattern Recognition · Computer Science 2021-03-25 Yishan He , Fei Gao , Jun Wang , Amir Hussain , Erfu Yang , Huiyu Zhou

Sparse R-CNN is a recent strong object detection baseline by set prediction on sparse, learnable proposal boxes and proposal features. In this work, we propose to improve Sparse R-CNN with two dynamic designs. First, Sparse R-CNN adopts a…

Computer Vision and Pattern Recognition · Computer Science 2022-05-05 Qinghang Hong , Fengming Liu , Dong Li , Ji Liu , Lu Tian , Yi Shan

Current state-of-the-art two-stage detectors generate oriented proposals through time-consuming schemes. This diminishes the detectors' speed, thereby becoming the computational bottleneck in advanced oriented object detection systems. This…

Computer Vision and Pattern Recognition · Computer Science 2021-08-13 Xingxing Xie , Gong Cheng , Jiabao Wang , Xiwen Yao , Junwei Han

This paper presents the novel idea of generating object proposals by leveraging temporal information for video object detection. The feature aggregation in modern region-based video object detectors heavily relies on learned proposals…

Computer Vision and Pattern Recognition · Computer Science 2022-10-10 Khurram Azeem Hashmi , Didier Stricker , Muhammamd Zeshan Afzal

Deep learning methods have made significant progress in ship detection in synthetic aperture radar (SAR) images. The pretraining technique is usually adopted to support deep neural networks-based SAR ship detectors due to the scarce labeled…

Computer Vision and Pattern Recognition · Computer Science 2021-03-16 Wei Bao , Meiyu Huang , Yaqin Zhang , Yao Xu , Xuejiao Liu , Xueshuang Xiang

Currently, reliable and accurate ship detection in optical remote sensing images is still challenging. Even the state-of-the-art convolutional neural network (CNN) based methods cannot obtain very satisfactory results. To more accurately…

Computer Vision and Pattern Recognition · Computer Science 2021-08-27 Linhao Li , Zhiqiang Zhou , Bo Wang , Lingjuan Miao , Hua Zong

Automatic detection of firearms is important for enhancing the security and safety of people, however, it is a challenging task owing to the wide variations in shape, size, and appearance of firearms. Also, most of the generic object…

Computer Vision and Pattern Recognition · Computer Science 2021-02-02 Javed Iqbal , Muhammad Akhtar Munir , Arif Mahmood , Afsheen Rafaqat Ali , Mohsen Ali

Single point-supervised object detection is gaining attention due to its cost-effectiveness. However, existing approaches focus on generating horizontal bounding boxes (HBBs) while ignoring oriented bounding boxes (OBBs) commonly used for…

Computer Vision and Pattern Recognition · Computer Science 2023-11-28 Junwei Luo , Xue Yang , Yi Yu , Qingyun Li , Junchi Yan , Yansheng Li

Detecting oriented objects along with estimating their rotation information is one crucial step for analyzing remote sensing images. Despite that many methods proposed recently have achieved remarkable performance, most of them directly…

Computer Vision and Pattern Recognition · Computer Science 2021-12-02 Yanjie Wang , Xu Zou , Zhijun Zhang , Wenhui Xu , Liqun Chen , Sheng Zhong , Luxin Yan , Guodong Wang

A few lightweight convolutional neural network (CNN) models have been recently designed for remote sensing object detection (RSOD). However, most of them simply replace vanilla convolutions with stacked separable convolutions, which may not…

Computer Vision and Pattern Recognition · Computer Science 2022-09-19 Zhanchao Huang , Wei Li , Xiang-Gen Xia , Hao Wang , Feiran Jie , Ran Tao

Detection and tracking of moving objects is an essential component in environmental perception for autonomous driving. In the flourishing field of multi-view 3D camera-based detectors, different transformer-based pipelines are designed to…

Computer Vision and Pattern Recognition · Computer Science 2023-07-04 Yining Shi , Jingyan Shen , Yifan Sun , Yunlong Wang , Jiaxin Li , Shiqi Sun , Kun Jiang , Diange Yang

Oriented object detection is a fundamental yet challenging task in remote sensing (RS), aiming to locate and classify objects with arbitrary orientations. Recent advancements in deep learning have significantly enhanced the capabilities of…

Computer Vision and Pattern Recognition · Computer Science 2025-08-25 Kun Wang , Zi Wang , Zhang Li , Ang Su , Xichao Teng , Erting Pan , Minhao Liu , Qifeng Yu

We define the object detection from imagery problem as estimating a very large but extremely sparse bounding box dependent probability distribution. Subsequently we identify a sparse distribution estimation scheme, Directed Sparse Sampling,…

Computer Vision and Pattern Recognition · Computer Science 2017-07-24 Lachlan Tychsen-Smith , Lars Petersson

A novel efficient method for extraction of object proposals is introduced. Its "objectness" function exploits deep spatial pyramid features, a novel fast-to-compute HoG-based edge statistic and the EdgeBoxes score. The efficiency is…

Computer Vision and Pattern Recognition · Computer Science 2015-10-14 David Novotny , Jiri Matas

Objects in aerial images usually have arbitrary orientations and are densely located over the ground, making them extremely challenge to be detected. Many recently developed methods attempt to solve these issues by estimating an extra…

Computer Vision and Pattern Recognition · Computer Science 2021-09-21 Ran Qin , Qingjie Liu , Guangshuai Gao , Di Huang , Yunhong Wang

We propose a 3D object detection method for autonomous driving by fully exploiting the sparse and dense, semantic and geometry information in stereo imagery. Our method, called Stereo R-CNN, extends Faster R-CNN for stereo inputs to…

Computer Vision and Pattern Recognition · Computer Science 2019-04-11 Peiliang Li , Xiaozhi Chen , Shaojie Shen

Forward-looking sonar can capture high resolution images of underwater scenes, but their interpretation is complex. Generic object detection in such images has not been solved, specially in cases of small and unknown objects. In comparison,…

Computer Vision and Pattern Recognition · Computer Science 2017-09-11 Matias Valdenegro-Toro

The detection and prevention of illegal fishing is critical to maintaining a healthy and functional ecosystem. Recent research on ship detection in satellite imagery has focused exclusively on performance improvements, disregarding…

Computer Vision and Pattern Recognition · Computer Science 2022-12-13 Arthur Van Meerbeeck , Jordy Van Landeghem , Ruben Cartuyvels , Marie-Francine Moens
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