no code implementations • 12 Jul 2024 • Atefeh Khoshkhahtinat, Ali Zafari, Piyush M. Mehta, Nasser M. Nasrabadi, Barbara J. Thompson, Michael S. F. Kirk, Daniel da Silva
In this work, we introduce an architecture based on the Transformer model, which is specifically designed to capture both local and global information from input images in an effective and efficient manner.
no code implementations • CVPR 2024 • Atefeh Khoshkhahtinat, Ali Zafari, Piyush M. Mehta, Nasser M. Nasrabadi
The global spatial context is built upon the Transformer, which is specifically designed for image compression tasks.
no code implementations • 6 Nov 2023 • Ali Zafari, Atefeh Khoshkhahtinat, Jeremy A. Grajeda, Piyush M. Mehta, Nasser M. Nasrabadi, Laura E. Boucheron, Barbara J. Thompson, Michael S. F. Kirk, Daniel da Silva
In this work, we propose an adversarially trained neural network, equipped with local and non-local attention modules to capture both the local and global structure of the image resulting in a better trade-off in rate-distortion (RD) compared to conventional hand-engineered codecs.
no code implementations • 19 Sep 2023 • Atefeh Khoshkhahtinat, Ali Zafari, Piyush M. Mehta, Mohammad Akyash, Hossein Kashiani, Nasser M. Nasrabadi
In addition, we introduce a novel entropy model that incorporates two different hyperpriors to model cross-channel and spatial dependencies of the latent representation.
no code implementations • 19 Sep 2023 • Ali Zafari, Atefeh Khoshkhahtinat, Piyush M. Mehta, Nasser M. Nasrabadi, Barbara J. Thompson, Michael S. F. Kirk, Daniel da Silva
Recently successful end-to-end optimized neural network-based image compression systems have shown great potential to be used in an ad-hoc manner.
no code implementations • 19 Sep 2023 • Atefeh Khoshkhahtinat, Ali Zafari, Piyush M. Mehta, Nasser M. Nasrabadi, Barbara J. Thompson, Michael S. F. Kirk, Daniel da Silva
NASA's Solar Dynamics Observatory (SDO) mission collects large data volumes of the Sun's daily activity.
no code implementations • 3 Jun 2023 • Joshua D. Daniell, Piyush M. Mehta
The best models found in this work are ensemble approaches using multi step or a combination of multi step and dynamic predictions.
1 code implementation • 8 Nov 2022 • Richard J. Licata, Piyush M. Mehta
The geospace environment is volatile and highly driven.
no code implementations • 12 Oct 2022 • Ali Zafari, Atefeh Khoshkhahtinat, Piyush M. Mehta, Nasser M. Nasrabadi, Barbara J. Thompson, Daniel da Silva, Michael S. F. Kirk
We have designed an ad-hoc ANN-based image compression scheme to reduce the amount of data needed to be stored and retrieved on space missions studying solar dynamics.
no code implementations • 24 Aug 2022 • Richard J. Licata, Piyush M. Mehta, Daniel R. Weimer, W. Kent Tobiska, Jean Yoshii
In this work, we develop an exospheric temperature model based in machine learning (ML) that can be used with NRLMSIS 2. 0 to calibrate it relative to high-fidelity satellite density estimates.
no code implementations • 12 Jun 2022 • Richard J. Licata, Piyush M. Mehta, Daniel R. Weimer, Douglas P. Drob, W. Kent Tobiska, Jean Yoshii
Machine learning (ML) is often viewed as a black-box regression technique that is unable to provide considerable scientific insight.
no code implementations • 6 Jan 2022 • Richard J. Licata, Piyush M. Mehta
For the global model regressed on the SET HASDM density database, we achieve errors of 11% on independent test data with well-calibrated uncertainty estimates.
no code implementations • 16 Sep 2021 • Richard J. Licata, Piyush M. Mehta, W. Kent Tobiska, S. Huzurbazar
These models leverage Monte Carlo (MC) dropout to provide uncertainty estimates, and the use of the NLPD loss function results in well-calibrated uncertainty estimates without sacrificing model accuracy (<10% mean absolute error).