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Fine-grained classification remains a challenging task because distinguishing categories needs learning complex and local differences. Diversity in the pose, scale, and position of objects in an image makes the problem even more difficult.…

Computer Vision and Pattern Recognition · Computer Science 2021-09-03 Mahdi Darvish , Mahsa Pouramini , Hamid Bahador

We address the problem of vehicle self-localization from multi-modal sensor information and a reference map. The map is generated off-line by extracting landmarks from the vehicle's field of view, while the measurements are collected…

Robotics · Computer Science 2019-07-22 Nico Engel , Stefan Hoermann , Markus Horn , Vasileios Belagiannis , Klaus Dietmayer

Given a collection of images, humans are able to discover landmarks by modeling the shared geometric structure across instances. This idea of geometric equivariance has been widely used for the unsupervised discovery of object landmark…

Computer Vision and Pattern Recognition · Computer Science 2021-04-06 Zezhou Cheng , Jong-Chyi Su , Subhransu Maji

We propose a novel methodology for general multi-class classification in arbitrary feature spaces, which results in a potentially well-calibrated classifier. Calibrated classifiers are important in many applications because, in addition to…

Machine Learning · Statistics 2023-02-22 Raoul Heese , Jochen Schmid , Michał Walczak , Michael Bortz

We present a weakly supervised deep learning method to perform instance segmentation of cells present in microscopy images. Annotation of biomedical images in the lab can be scarce, incomplete, and inaccurate. This is of concern when…

Computer Vision and Pattern Recognition · Computer Science 2019-08-28 Fidel A. Guerrero-Peña , Pedro D. Marrero Fernandez , Tsang Ing Ren , Alexandre Cunha

Top-k error is currently a popular performance measure on large scale image classification benchmarks such as ImageNet and Places. Despite its wide acceptance, our understanding of this metric is limited as most of the previous research is…

Computer Vision and Pattern Recognition · Computer Science 2016-12-19 Maksim Lapin , Matthias Hein , Bernt Schiele

Visual attributes, from simple objects (e.g., backpacks, hats) to soft-biometrics (e.g., gender, height, clothing) have proven to be a powerful representational approach for many applications such as image description and human…

Computer Vision and Pattern Recognition · Computer Science 2017-08-30 Nikolaos Sarafianos , Theodore Giannakopoulos , Christophoros Nikou , Ioannis A. Kakadiaris

We propose a simple yet powerful Landmark guided Generative Adversarial Network (LandmarkGAN) for the facial expression-to-expression translation using a single image, which is an important and challenging task in computer vision since the…

Computer Vision and Pattern Recognition · Computer Science 2022-09-07 Hao Tang , Nicu Sebe

Object category localization is a challenging problem in computer vision. Standard supervised training requires bounding box annotations of object instances. This time-consuming annotation process is sidestepped in weakly supervised…

Computer Vision and Pattern Recognition · Computer Science 2016-05-30 Ramazan Gokberk Cinbis , Jakob Verbeek , Cordelia Schmid

Visual Place recognition is commonly addressed as an image retrieval problem. However, retrieval methods are impractical to scale to large datasets, densely sampled from city-wide maps, since their dimension impact negatively on the…

Computer Vision and Pattern Recognition · Computer Science 2023-12-08 Gabriele Trivigno , Gabriele Berton , Juan Aragon , Barbara Caputo , Carlo Masone

This work focuses on complete 3D facial geometry prediction, including 3D facial alignment via 3D face modeling and face orientation estimation using the proposed multi-task, multi-modal, and multi-representation landmark refinement network…

Computer Vision and Pattern Recognition · Computer Science 2021-04-20 Cho-Ying Wu , Qiangeng Xu , Ulrich Neumann

One of the most significant challenges facing a few-shot learning task is the generalizability of the (meta-)model from the base to the novel categories. Most of existing few-shot learning models attempt to address this challenge by either…

Computer Vision and Pattern Recognition · Computer Science 2020-01-01 Haohang Xu , Hongkai Xiong , Guojun Qi

Annotated images and ground truth for the diagnosis of rare and novel diseases are scarce. This is expected to prevail, considering the small number of affected patient population and limited clinical expertise to annotate images. Further,…

Computer Vision and Pattern Recognition · Computer Science 2022-11-01 Karthik Desingu , Mirunalini P. , Aravindan Chandrabose

Modern approaches typically formulate semantic segmentation as a per-pixel classification task, while instance-level segmentation is handled with an alternative mask classification. Our key insight: mask classification is sufficiently…

Computer Vision and Pattern Recognition · Computer Science 2021-11-02 Bowen Cheng , Alexander G. Schwing , Alexander Kirillov

Whole slide image (WSI) classification is a fundamental task for the diagnosis and treatment of diseases; but, curation of accurate labels is time-consuming and limits the application of fully-supervised methods. To address this, multiple…

Computer Vision and Pattern Recognition · Computer Science 2022-07-25 Philip Chikontwe , Soo Jeong Nam , Heounjeong Go , Meejeong Kim , Hyun Jung Sung , Sang Hyun Park

We present an online landmark selection method for distributed long-term visual localization systems in bandwidth-constrained environments. Sharing a common map for online localization provides a fleet of au- tonomous vehicles with the…

Robotics · Computer Science 2018-08-09 Mathias Bürki , Igor Gilitschenski , Elena Stumm , Roland Siegwart , Juan Nieto

For real-time semantic video segmentation, most recent works utilised a dynamic framework with a key scheduler to make online key/non-key decisions. Some works used a fixed key scheduling policy, while others proposed adaptive key…

Computer Vision and Pattern Recognition · Computer Science 2021-03-02 Yujiang Wang , Mingzhi Dong , Jie Shen , Yang Wu , Shiyang Cheng , Maja Pantic

Consider a multi-class labelling problem, where the labels can take values in $[k]$, and a predictor predicts a distribution over the labels. In this work, we study the following foundational question: Are there notions of multi-class…

Machine Learning · Computer Science 2024-06-11 Parikshit Gopalan , Lunjia Hu , Guy N. Rothblum

Limited labeled data are available for the research of estimating facial expression intensities. For instance, the ability to train deep networks for automated pain assessment is limited by small datasets with labels of patient-reported…

Computer Vision and Pattern Recognition · Computer Science 2017-06-02 Feng Wang , Xiang Xiang , Chang Liu , Trac D. Tran , Austin Reiter , Gregory D. Hager , Harry Quon , Jian Cheng , Alan L. Yuille

Multiple instance learning (MIL) problem is currently solved from either bag-classification or instance-classification perspective, both of which ignore important information contained in some instances and result in limited performance.…

Computer Vision and Pattern Recognition · Computer Science 2024-08-12 Yingfan Ma , Xiaoyuan Luo , Mingzhi Yuan , Xinrong Chen , Manning Wang