Search Results for author: Stefan Winkler

Found 39 papers, 24 papers with code

MaxEnt Loss: Constrained Maximum Entropy for Calibration under Out-of-Distribution Shift

1 code implementation26 Oct 2023 Dexter Neo, Stefan Winkler, Tsuhan Chen

We present a new loss function that addresses the out-of-distribution (OOD) calibration problem.

A Two-Stage Decoder for Efficient ICD Coding

1 code implementation27 May 2023 Thanh-Tung Nguyen, Viktor Schlegel, Abhinav Kashyap, Stefan Winkler

Clinical notes in healthcare facilities are tagged with the International Classification of Diseases (ICD) code; a list of classification codes for medical diagnoses and procedures.

Multilabel Text Classification text-classification +1

Trusted Media Challenge Dataset and User Study

no code implementations13 Jan 2022 Weiling Chen, Sheng Lun Benjamin Chua, Stefan Winkler, See-Kiong Ng

To tackle the issue, we have organized the Trusted Media Challenge (TMC) to explore how Artificial Intelligence (AI) technologies could be leveraged to combat fake media.

Detecting Blurred Ground-based Sky/Cloud Images

1 code implementation19 Oct 2021 Mayank Jain, Navya Jain, Yee Hui Lee, Stefan Winkler, Soumyabrata Dev

To the best of our knowledge, our approach is the first of its kind in the automatic identification of blurred images for ground-based sky/cloud images.

Efficient Facial Expression Analysis For Dimensional Affect Recognition Using Geometric Features

no code implementations15 Jun 2021 Vassilios Vonikakis, Stefan Winkler

Despite their continued popularity, categorical approaches to affect recognition have limitations, especially in real-life situations.

regression

Forecasting Precipitable Water Vapor Using LSTMs

1 code implementation26 Jun 2020 Mayank Jain, Shilpa Manandhar, Yee Hui Lee, Stefan Winkler, Soumyabrata Dev

Long-Short-Term-Memory (LSTM) networks have been used extensively for time series forecasting in recent years due to their ability of learning patterns over different periods of time.

Time Series Time Series Forecasting

Empirical Analysis of Overfitting and Mode Drop in GAN Training

no code implementations25 Jun 2020 Yasin Yazici, Chuan-Sheng Foo, Stefan Winkler, Kim-Hui Yap, Vijay Chandrasekhar

We examine two key questions in GAN training, namely overfitting and mode drop, from an empirical perspective.

Subjective Quality Assessment of Ground-based Camera Images

no code implementations16 Dec 2019 Lucie Lévêque, Soumyabrata Dev, Murhaf Hossari, Yee Hui Lee, Stefan Winkler

Image quality assessment is critical to control and maintain the perceived quality of visual content.

Image Quality Assessment

Estimating Solar Irradiance Using Sky Imagers

1 code implementation11 Oct 2019 Soumyabrata Dev, Florian M. Savoy, Yee Hui Lee, Stefan Winkler

Unlike pyranometers, such sky images contain information about cloud coverage and can be used to derive cloud movement.

CloudSegNet: A Deep Network for Nychthemeron Cloud Image Segmentation

1 code implementation16 Apr 2019 Soumyabrata Dev, Atul Nautiyal, Yee Hui Lee, Stefan Winkler

In the existing literature, however, analysis of daytime and nighttime images is considered separately, mainly because of differences in image characteristics and applications.

Cloud Detection Image Segmentation +2

Venn GAN: Discovering Commonalities and Particularities of Multiple Distributions

1 code implementation9 Feb 2019 Yasin Yazici, Bruno Lecouat, Chuan-Sheng Foo, Stefan Winkler, Kim-Hui Yap, Georgios Piliouras, Vijay Chandrasekhar

We propose a GAN design which models multiple distributions effectively and discovers their commonalities and particularities.

A Deep Network for Arousal-Valence Emotion Prediction with Acoustic-Visual Cues

1 code implementation2 May 2018 Songyou Peng, Le Zhang, Yutong Ban, Meng Fang, Stefan Winkler

In this paper, we comprehensively describe the methodology of our submissions to the One-Minute Gradual-Emotion Behavior Challenge 2018.

High-Dynamic-Range Imaging for Cloud Segmentation

1 code implementation2 Mar 2018 Soumyabrata Dev, Florian M. Savoy, Yee Hui Lee, Stefan Winkler

It is thus difficult to capture the details of an entire scene with a regular camera in a single shot.

Benchmarking Image Generation +2

Autoregressive Generative Adversarial Networks

no code implementations ICLR 2018 Yasin Yazici, Kim-Hui Yap, Stefan Winkler

Generative Adversarial Networks (GANs) learn a generative model by playing an adversarial game between a generator and an auxiliary discriminator, which classifies data samples vs. generated ones.

Binary Classification General Classification +1

Study of Clear Sky Models for Singapore

1 code implementation24 Aug 2017 Soumyabrata Dev, Shilpa Manandhar, Yee Hui Lee, Stefan Winkler

The estimation of total solar irradiance falling on the earth's surface is important in the field of solar energy generation and forecasting.

Beyond Forward Shortcuts: Fully Convolutional Master-Slave Networks (MSNets) with Backward Skip Connections for Semantic Segmentation

no code implementations18 Jul 2017 Abrar H. Abdulnabi, Stefan Winkler, Gang Wang

However, during inference the lower layers do not know about high layer features, although they contain contextual high semantics that benefit low layers to adaptively extract informative features for later layers.

Scene Parsing Semantic Segmentation

Episodic CAMN: Contextual Attention-Based Memory Networks With Iterative Feedback for Scene Labeling

no code implementations CVPR 2017 Abrar H. Abdulnabi, Bing Shuai, Stefan Winkler, Gang Wang

Scene labeling can be seen as a sequence-sequence prediction task (pixels-labels), and it is quite important to leverage relevant context to enhance the performance of pixel classification.

General Classification Scene Labeling

Nighttime sky/cloud image segmentation

1 code implementation30 May 2017 Soumyabrata Dev, Florian M. Savoy, Yee Hui Lee, Stefan Winkler

An accurate segmentation of sky/cloud images is already challenging because of the clouds' non-rigid structure and size, and the lower and less stable illumination of the night sky increases the difficulty.

Image Segmentation Segmentation +1

Design of low-cost, compact and weather-proof whole sky imagers for high-dynamic-range captures

1 code implementation19 Apr 2017 Soumyabrata Dev, Florian M. Savoy, Yee Hui Lee, Stefan Winkler

Ground-based whole sky imagers are popular for monitoring cloud formations, which is necessary for various applications.

Cloud Radiative Effect Study Using Sky Camera

1 code implementation15 Mar 2017 Soumyabrata Dev, Shilpa Manandhar, Feng Yuan, Yee Hui Lee, Stefan Winkler

weather reporting, climate forecasting, and solar energy generation.

Systematic study of color spaces and components for the segmentation of sky/cloud images

1 code implementation17 Jan 2017 Soumyabrata Dev, Yee Hui Lee, Stefan Winkler

Sky/cloud imaging using ground-based Whole Sky Imagers (WSI) is a cost-effective means to understanding cloud cover and weather patterns.

Clustering Segmentation

Rough Set Based Color Channel Selection

1 code implementation3 Nov 2016 Soumyabrata Dev, Florian M. Savoy, Yee Hui Lee, Stefan Winkler

Color channel selection is essential for accurate segmentation of sky and clouds in images obtained from ground-based sky cameras.

Segmentation

Short-term prediction of localized cloud motion using ground-based sky imagers

no code implementations21 Oct 2016 Soumyabrata Dev, Florian M. Savoy, Yee Hui Lee, Stefan Winkler

Fine-scale short-term cloud motion prediction is needed for several applications, including solar energy generation and satellite communications.

motion prediction Optical Flow Estimation

Detecting Rainfall Onset Using Sky Images

no code implementations21 Oct 2016 Soumyabrata Dev, Shilpa Manandhar, Yee Hui Lee, Stefan Winkler

Ground-based sky cameras (popularly known as Whole Sky Imagers) are increasingly used now-a-days for continuous monitoring of the atmosphere.

Estimation of solar irradiance using ground-based whole sky imagers

1 code implementation8 Jun 2016 Soumyabrata Dev, Florian M. Savoy, Yee Hui Lee, Stefan Winkler

Ground-based whole sky imagers (WSIs) can provide localized images of the sky of high temporal and spatial resolution, which permits fine-grained cloud observation.

WAHRSIS: A Low-cost, High-resolution Whole Sky Imager With Near-Infrared Capabilities

1 code implementation21 May 2016 Soumyabrata Dev, Florian M. Savoy, Yee Hui Lee, Stefan Winkler

Cloud imaging using ground-based whole sky imagers is essential for a fine-grained understanding of the effects of cloud formations, which can be useful in many applications.

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