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We propose a novel learned keypoint detection method to increase the number of correct matches for the task of non-rigid image correspondence. By leveraging true correspondences acquired by matching annotated image pairs with a specified…

Computer Vision and Pattern Recognition · Computer Science 2023-09-13 Felipe Cadar , Welerson Melo , Vaishnavi Kanagasabapathi , Guilherme Potje , Renato Martins , Erickson R. Nascimento

In object detection, the intersection over union (IoU) threshold is frequently used to define positives/negatives. The threshold used to train a detector defines its \textit{quality}. While the commonly used threshold of 0.5 leads to noisy…

Computer Vision and Pattern Recognition · Computer Science 2019-06-25 Zhaowei Cai , Nuno Vasconcelos

A standard one-stage detector is comprised of two tasks: classification and regression. Anchors of different shapes are introduced for each location in the feature map to mitigate the challenge of regression for multi-scale objects.…

Computer Vision and Pattern Recognition · Computer Science 2020-09-11 Lei Chen , Qi Qian , Hao Li

Most existing object detectors suffer from class imbalance problems that hinder balanced performance. In particular, anchor free object detectors have to solve the background imbalance problem due to detection in a per-pixel prediction…

Computer Vision and Pattern Recognition · Computer Science 2020-12-29 Hopyong Gil , Sangwoo Park , Yusang Park , Wongoo Han , Juyean Hong , Juneyoung Jung

Common object detection models consist of classification and regression branches, due to different task drivers, these two branches have different sensibility to the features from the same scale level and the same spatial location. The…

Computer Vision and Pattern Recognition · Computer Science 2022-07-07 Shuaizheng Hao , Hongzhe Liu , Ningwei Wang , Cheng Xu

Object detection has been dominated by anchor-based detectors for several years. Recently, anchor-free detectors have become popular due to the proposal of FPN and Focal Loss. In this paper, we first point out that the essential difference…

Computer Vision and Pattern Recognition · Computer Science 2020-06-23 Shifeng Zhang , Cheng Chi , Yongqiang Yao , Zhen Lei , Stan Z. Li

In this paper, we aim to improve the performance of a deep learning model towards image classification tasks, proposing a novel anchor-based training methodology, named \textit{Online Anchor-based Training} (OAT). The OAT method, guided by…

Computer Vision and Pattern Recognition · Computer Science 2024-06-19 Maria Tzelepi , Vasileios Mezaris

Image captioning models have lately shown impressive results when applied to standard datasets. Switching to real-life scenarios, however, constitutes a challenge due to the larger variety of visual concepts which are not covered in…

Computer Vision and Pattern Recognition · Computer Science 2021-06-04 Marco Cagrandi , Marcella Cornia , Matteo Stefanini , Lorenzo Baraldi , Rita Cucchiara

The field of Continual Learning investigates the ability to learn consecutive tasks without losing performance on those previously learned. Its focus has been mainly on incremental classification tasks. We believe that research in continual…

Computer Vision and Pattern Recognition · Computer Science 2022-06-01 Angelo G. Menezes , Gustavo de Moura , Cézanne Alves , André C. P. L. F. de Carvalho

Object detectors are conventionally trained by a weighted sum of classification and localization losses. Recent studies (e.g., predicting IoU with an auxiliary head, Generalized Focal Loss, Rank & Sort Loss) have shown that forcing these…

Computer Vision and Pattern Recognition · Computer Science 2023-01-04 Fehmi Kahraman , Kemal Oksuz , Sinan Kalkan , Emre Akbas

Usually, it is difficult to determine the scale and aspect ratio of anchors for anchor-based object detection methods. Current state-of-the-art object detectors either determine anchor parameters according to objects' shape and scale in a…

Computer Vision and Pattern Recognition · Computer Science 2022-04-28 Xiaopei Wan , Guoqiu Li , Yujiu Yang , Zhenhua Guo

In computer vision, object detection is one of most important tasks, which underpins a few instance-level recognition tasks and many downstream applications. Recently one-stage methods have gained much attention over two-stage approaches…

Computer Vision and Pattern Recognition · Computer Science 2020-10-13 Zhi Tian , Chunhua Shen , Hao Chen , Tong He

During the last years, deep learning trackers achieved stimulating results while bringing interesting ideas to solve the tracking problem. This progress is mainly due to the use of learned deep features obtained by training deep…

Computer Vision and Pattern Recognition · Computer Science 2020-12-24 Ahmed Zgaren , Wassim Bouachir , Riadh Ksantini

Robustness to small image translations is a highly desirable property for object detectors. However, recent works have shown that CNN-based classifiers are not shift invariant. It is unclear to what extent this could impact object…

Computer Vision and Pattern Recognition · Computer Science 2020-08-14 Marco Manfredi , Yu Wang

The deep neural network is vulnerable to adversarial examples. Adding imperceptible adversarial perturbations to images is enough to make them fail. Most existing research focuses on attacking image classifiers or anchor-based object…

Computer Vision and Pattern Recognition · Computer Science 2020-10-28 Quanyu Liao , Xin Wang , Bin Kong , Siwei Lyu , Youbing Yin , Qi Song , Xi Wu

Existing computer vision and object detection methods strongly rely on neural networks and deep learning. This active research area is used for applications such as autonomous driving, aerial photography, protection, and monitoring.…

Computer Vision and Pattern Recognition · Computer Science 2022-12-01 Imran Khan Mirani , Chen Tianhua , Malak Abid Ali Khan , Syed Muhammad Aamir , Waseef Menhaj

We present a simple and flexible object detection framework optimized for autonomous driving. Building on the observation that point clouds in this application are extremely sparse, we propose a practical pillar-based approach to fix the…

Computer Vision and Pattern Recognition · Computer Science 2020-07-28 Yue Wang , Alireza Fathi , Abhijit Kundu , David Ross , Caroline Pantofaru , Thomas Funkhouser , Justin Solomon

Determining positive/negative samples for object detection is known as label assignment. Here we present an anchor-free detector named AutoAssign. It requires little human knowledge and achieves appearance-aware through a fully…

Computer Vision and Pattern Recognition · Computer Science 2020-11-26 Benjin Zhu , Jianfeng Wang , Zhengkai Jiang , Fuhang Zong , Songtao Liu , Zeming Li , Jian Sun

This paper proposes a shape anchor guided learning strategy (AncLearn) for robust holistic indoor scene understanding. We observe that the search space constructed by current methods for proposal feature grouping and instance point sampling…

Computer Vision and Pattern Recognition · Computer Science 2023-09-21 Mingyue Dong , Linxi Huan , Hanjiang Xiong , Shuhan Shen , Xianwei Zheng

The field of object detection and understanding is rapidly evolving, driven by advances in both traditional CNN-based models and emerging multi-modal large language models (LLMs). While CNNs like ResNet and YOLO remain highly effective for…

Computer Vision and Pattern Recognition · Computer Science 2025-10-13 Nirmal Elamon , Rouzbeh Davoudi