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We present FoveaBox, an accurate, flexible, and completely anchor-free framework for object detection. While almost all state-of-the-art object detectors utilize predefined anchors to enumerate possible locations, scales and aspect ratios…

Computer Vision and Pattern Recognition · Computer Science 2020-07-17 Tao Kong , Fuchun Sun , Huaping Liu , Yuning Jiang , Lei Li , Jianbo Shi

Accurate 3D object detection in LiDAR based point clouds suffers from the challenges of data sparsity and irregularities. Existing methods strive to organize the points regularly, e.g. voxelize, pass them through a designed 2D/3D neural…

Computer Vision and Pattern Recognition · Computer Science 2020-10-14 Qi Chen , Lin Sun , Zhixin Wang , Kui Jia , Alan Yuille

Accurate and fast 3D object detection from point clouds is a key task in autonomous driving. Existing one-stage 3D object detection methods can achieve real-time performance, however, they are dominated by anchor-based detectors which are…

Computer Vision and Pattern Recognition · Computer Science 2021-10-26 Guojun Wang , Jian Wu , Bin Tian , Siyu Teng , Long Chen , Dongpu Cao

We propose an approach to instance-level image segmentation that is built on top of category-level segmentation. Specifically, for each pixel in a semantic category mask, its corresponding instance bounding box is predicted using a deep…

Computer Vision and Pattern Recognition · Computer Science 2016-05-24 Zifeng Wu , Chunhua Shen , Anton van den Hengel

In this paper, we propose a general approach to optimize anchor boxes for object detection. Nowadays, anchor boxes are widely adopted in state-of-the-art detection frameworks. However, these frameworks usually pre-define anchor box shapes…

Computer Vision and Pattern Recognition · Computer Science 2020-01-28 Yuanyi Zhong , Jianfeng Wang , Jian Peng , Lei Zhang

Instance-level human analysis is common in real-life scenarios and has multiple manifestations, such as human part segmentation, dense pose estimation, human-object interactions, etc. Models need to distinguish different human instances in…

Computer Vision and Pattern Recognition · Computer Science 2018-12-03 Lu Yang , Qing Song , Zhihui Wang , Ming Jiang

In this paper, we propose a simple yet efficientinstance segmentation approach based on the single-stage anchor-free detector, termed SAIS. In our approach, the instancesegmentation task consists of two parallel subtasks which re-spectively…

Computer Vision and Pattern Recognition · Computer Science 2019-12-04 Canqun Xiang , Shishun Tian , Wenbin Zou , Chen Xu

Multi-human parsing aims to segment every body part of every human instance. Nearly all state-of-the-art methods follow the "detection first" or "segmentation first" pipelines. Different from them, we present an end-to-end and box-free…

Computer Vision and Pattern Recognition · Computer Science 2022-01-05 Min Yan , Guoshan Zhang , Tong Zhang , Yueming Zhang

In this paper, we tackle the problem of human de-occlusion which reasons about occluded segmentation masks and invisible appearance content of humans. In particular, a two-stage framework is proposed to estimate the invisible portions and…

Computer Vision and Pattern Recognition · Computer Science 2021-03-23 Qiang Zhou , Shiyin Wang , Yitong Wang , Zilong Huang , Xinggang Wang

In object detection, determining which anchors to assign as positive or negative samples, known as anchor assignment, has been revealed as a core procedure that can significantly affect a model's performance. In this paper we propose a…

Computer Vision and Pattern Recognition · Computer Science 2020-09-08 Kang Kim , Hee Seok Lee

Most of the existing single-stage and two-stage 3D object detectors are anchor-based methods, while the efficient but challenging anchor-free single-stage 3D object detection is not well investigated. Recent studies on 2D object detection…

Computer Vision and Pattern Recognition · Computer Science 2021-08-10 Jiale Li , Hang Dai , Ling Shao , Yong Ding

Instance segmentation of biological images is essential for studying object behaviors and properties. The challenges, such as clustering, occlusion, and adhesion problems of the objects, make instance segmentation a non-trivial task.…

Computer Vision and Pattern Recognition · Computer Science 2019-11-22 Jingru Yi , Hui Tang , Pengxiang Wu , Bo Liu , Daniel J. Hoeppner , Dimitris N. Metaxas , Lianyi Han , Wei Fan

Modern object detectors rely heavily on rectangular bounding boxes, such as anchors, proposals and the final predictions, to represent objects at various recognition stages. The bounding box is convenient to use but provides only a coarse…

Computer Vision and Pattern Recognition · Computer Science 2019-08-20 Ze Yang , Shaohui Liu , Han Hu , Liwei Wang , Stephen Lin

Multi-human parsing is the task of segmenting human body parts while associating each part to the person it belongs to, combining instance-level and part-level information for fine-grained human understanding. In this work, we demonstrate…

Computer Vision and Pattern Recognition · Computer Science 2025-09-15 Laura Bragagnolo , Matteo Terreran , Leonardo Barcellona , Stefano Ghidoni

As artificial intelligence (AI) systems approach and surpass expert human performance across a broad range of tasks, obtaining high-quality human supervision for evaluation and training becomes increasingly challenging. Our focus is on…

Machine Learning · Computer Science 2026-02-25 Ren Yin , Takashi Ishida , Masashi Sugiyama

The detection of human parts (e.g., hands, face) and their correct association with individuals is an essential task, e.g., for ubiquitous human-machine interfaces and action recognition. Traditional methods often employ multi-stage…

Computer Vision and Pattern Recognition · Computer Science 2024-02-13 Zhongpai Gao , Huayi Zhou , Abhishek Sharma , Meng Zheng , Benjamin Planche , Terrence Chen , Ziyan Wu

In this paper, we propose FCHD-Fully Convolutional Head Detector, an end-to-end trainable head detection model. Our proposed architecture is a single fully convolutional network which is responsible for both bounding box prediction and…

Computer Vision and Pattern Recognition · Computer Science 2019-05-07 Aditya Vora , Vinay Chilaka

Although the anchor-based detectors have taken a big step forward in pedestrian detection, the overall performance of algorithm still needs further improvement for practical applications, \emph{e.g.}, a good trade-off between the accuracy…

Computer Vision and Pattern Recognition · Computer Science 2020-07-28 Chubin Zhuang , Zhen Lei , Stan Z. Li

Instance-level alignment is widely exploited for person re-identification, e.g. spatial alignment, latent semantic alignment and triplet alignment. This paper probes another feature alignment modality, namely cluster-level feature alignment…

Computer Vision and Pattern Recognition · Computer Science 2020-08-18 Qiuyu Chen , Wei Zhang , Jianping Fan

In this paper, we focus on improving binary 2D instance segmentation to assist humans in labeling ground truth datasets with polygons. Humans labeler just have to draw boxes around objects, and polygons are generated automatically. To be…

Computer Vision and Pattern Recognition · Computer Science 2022-08-25 Darshan Ganganna Ravindra , Laslo Dinges , Al-Hamadi Ayoub , Vasili Baranau