Search Results for author: Morteza Karimzadeh

Found 7 papers, 4 papers with code

Comparison of Cross-Entropy, Dice, and Focal Loss for Sea Ice Type Segmentation

1 code implementation26 Oct 2023 Rafael Pires de Lima, Behzad Vahedi, Morteza Karimzadeh

Up-to-date sea ice charts are crucial for safer navigation in ice-infested waters.

Deep Learning on SAR Imagery: Transfer Learning Versus Randomly Initialized Weights

1 code implementation26 Oct 2023 Morteza Karimzadeh, Rafael Pires de Lima

Deploying deep learning on Synthetic Aperture Radar (SAR) data is becoming more common for mapping purposes.

Transfer Learning

Enhancing sea ice segmentation in Sentinel-1 images with atrous convolutions

1 code implementation26 Oct 2023 Rafael Pires de Lima, Behzad Vahedi, Nick Hughes, Andrew P. Barrett, Walter Meier, Morteza Karimzadeh

Multiclass ice type classification is more challenging, and even though our models achieve 2% improvement in weighted F1 average compared to the baseline U-Net, test weighted F1 is generally between 0. 6 and 0. 80.

Binary Classification Image Segmentation +1

A spatiotemporal machine learning approach to forecasting COVID-19 incidence at the county level in the USA

1 code implementation24 Sep 2021 Benjamin Lucas, Behzad Vahedi, Morteza Karimzadeh

We highlight that the underutilization of data-driven forecasting of disease spread prior to COVID-19 is likely due to the lack of sufficient data available for previous diseases, in addition to the recent advances in machine learning methods for spatiotemporal forecasting.

Geovisual Analytics and Interactive Machine Learning for Situational Awareness

no code implementations11 Oct 2019 Morteza Karimzadeh, Luke S. Snyder, David S. Ebert

The first responder community has traditionally relied on calls from the public, officially-provided geographic information and maps for coordinating actions on the ground.

Attribute BIG-bench Machine Learning

City-level Geolocation of Tweets for Real-time Visual Analytics

no code implementations5 Oct 2019 Luke S. Snyder, Morteza Karimzadeh, Ray Chen, David S. Ebert

In this paper, we adapt, improve, and evaluate a state-of-the-art deep learning model for city-level geolocation prediction, and integrate it with a visual analytics system tailored for real-time situational awareness.

Interactive Learning for Identifying Relevant Tweets to Support Real-time Situational Awareness

no code implementations1 Aug 2019 Luke S. Snyder, Yi-Shan Lin, Morteza Karimzadeh, Dan Goldwasser, David S. Ebert

We present a novel interactive learning framework to improve the classification process in which the user iteratively corrects the relevancy of tweets in real-time to train the classification model on-the-fly for immediate predictive improvements.

Classification General Classification

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