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We present an anomaly detection method using Wasserstein generative adversarial networks (WGANs) on optical galaxy images from the wide-field survey conducted with the Hyper Suprime-Cam (HSC) on the Subaru Telescope in Hawai'i. The WGAN is…

We introduce a new algorithm named WGAN, an alternative to traditional GAN training. In this new model, we show that we can improve the stability of learning, get rid of problems like mode collapse, and provide meaningful learning curves…

机器学习 · 统计学 2017-12-08 Martin Arjovsky , Soumith Chintala , Léon Bottou

Deep convolutional neural networks (CNNs) have been shown to predict poverty and development indicators from satellite images with surprising accuracy. This paper presents a first attempt at analyzing the CNNs responses in detail and…

计算机视觉与模式识别 · 计算机科学 2023-12-04 Hamid Sarmadi , Thorsteinn Rögnvaldsson , Nils Roger Carlsson , Mattias Ohlsson , Ibrahim Wahab , Ola Hall

Machine learning algorithms are used in diverse domains, many of which face significant challenges due to data imbalance. Studies have explored various approaches to address the issue, like data preprocessing, cost-sensitive learning, and…

人工智能 · 计算机科学 2025-02-25 Pankaj Yadav , Gulshan Sihag , Vivek Vijay

We provide statistical theory for conditional and unconditional Wasserstein generative adversarial networks (WGANs) in the framework of dependent observations. We prove upper bounds for the excess Bayes risk of the WGAN estimators with…

统计理论 · 数学 2020-11-09 Moritz Haas , Stefan Richter

Generative Adversarial Networks (GANs) have shown promise in augmenting datasets and boosting convolutional neural networks' (CNN) performance on image classification tasks. But they introduce more hyperparameters to tune as well as the…

计算机视觉与模式识别 · 计算机科学 2022-01-25 Amil Dravid , Florian Schiffers , Yunan Wu , Oliver Cossairt , Aggelos K. Katsaggelos

Attributing the pixels of an input image to a certain category is an important and well-studied problem in computer vision, with applications ranging from weakly supervised localisation to understanding hidden effects in the data. In recent…

计算机视觉与模式识别 · 计算机科学 2018-06-27 Christian F. Baumgartner , Lisa M. Koch , Kerem Can Tezcan , Jia Xi Ang , Ender Konukoglu

Acquisition of data in task-specific applications of machine learning like plant disease recognition is a costly endeavor owing to the requirements of professional human diligence and time constraints. In this paper, we present a simple…

计算机视觉与模式识别 · 计算机科学 2019-09-27 Haseeb Nazki , Sook Yoon , Alvaro Fuentes , Dong Sun Park

In this paper, we aim to improve the state-of-the-art video generative adversarial networks (GANs) with a view towards multi-functional applications. Our improved video GAN model does not separate foreground from background nor dynamic from…

计算机视觉与模式识别 · 计算机科学 2018-03-16 Bernhard Kratzwald , Zhiwu Huang , Danda Pani Paudel , Acharya Dinesh , Luc Van Gool

In agricultural image analysis, optimal model performance is keenly pursued for better fulfilling visual recognition tasks (e.g., image classification, segmentation, object detection and localization), in the presence of challenges with…

计算机视觉与模式识别 · 计算机科学 2022-04-14 Ebenezer Olaniyi , Dong Chen , Yuzhen Lu , Yanbo Huang

Due to the various reasons such as atmospheric effects and differences in acquisition, it is often the case that there exists a large difference between spectral bands of satellite images collected from different geographic locations. The…

计算机视觉与模式识别 · 计算机科学 2020-10-28 Onur Tasar , S L Happy , Yuliya Tarabalka , Pierre Alliez

Training deep networks with limited labeled data while achieving a strong generalization ability is key in the quest to reduce human annotation efforts. This is the goal of semi-supervised learning, which exploits more widely available…

计算机视觉与模式识别 · 计算机科学 2021-04-14 Daiqing Li , Junlin Yang , Karsten Kreis , Antonio Torralba , Sanja Fidler

Standard Distributional Synthetic Controls (DSC) estimate counterfactual distributions by minimizing the Euclidean $L_2$ distance between quantile functions. We demonstrate that this geometric reliance renders estimators fragile: they lack…

计量经济学 · 经济学 2026-01-27 Xinran Liu

The present study uses domain experts to estimate welfare levels and indicators from high-resolution satellite imagery. We use the wealth quintiles from the 2015 Tanzania DHS dataset as ground truth data. We analyse the performance of the…

综合经济学 · 经济学 2022-10-18 Wahab Ibrahim , Ola Hall

We demonstrate training of a Generative Adversarial Network (GAN) for prediction of optical property maps (scattering and absorption) using spatial frequency domain imaging (SFDI) image data sets generated synthetically with free…

图像与视频处理 · 电气工程与系统科学 2022-10-04 Ahmed Osman , Jane Crowley , George Gordon

This paper explains the math behind a generative adversarial network (GAN) model and why it is hard to be trained. Wasserstein GAN is intended to improve GANs' training by adopting a smooth metric for measuring the distance between two…

机器学习 · 计算机科学 2019-04-22 Lilian Weng

Building footprint information is an essential ingredient for 3-D reconstruction of urban models. The automatic generation of building footprints from satellite images presents a considerable challenge due to the complexity of building…

计算机视觉与模式识别 · 计算机科学 2019-05-01 Yilei Shi , Qingyu Li , Xiao Xiang Zhu

This research paper addresses the significant challenge of accurately estimating poverty levels using deep learning, particularly in developing regions where traditional methods like household surveys are often costly, infrequent, and…

计算机视觉与模式识别 · 计算机科学 2024-12-02 Muhammad Umer Ramzan , Wahab Khaddim , Muhammad Ehsan Rana , Usman Ali , Manohar Ali , Fiaz ul Hassan , Fatima Mehmood

We extend Generative Adversarial Networks (GANs) to the semi-supervised context by forcing the discriminator network to output class labels. We train a generative model G and a discriminator D on a dataset with inputs belonging to one of N…

机器学习 · 统计学 2016-10-25 Augustus Odena

Fully automatic large-scale land cover mapping belongs to the core challenges addressed by the remote sensing community. Usually, the basis of this task is formed by (supervised) machine learning models. However, in spite of recent growth…

计算机视觉与模式识别 · 计算机科学 2020-04-29 Michael Schmitt , Jonathan Prexl , Patrick Ebel , Lukas Liebel , Xiao Xiang Zhu