Search Results for author: Swetava Ganguli

Found 13 papers, 0 papers with code

SeMAnD: Self-Supervised Anomaly Detection in Multimodal Geospatial Datasets

no code implementations26 Sep 2023 Daria Reshetova, Swetava Ganguli, C. V. Krishnakumar Iyer, Vipul Pandey

We propose a Self-supervised Anomaly Detection technique, called SeMAnD, to detect geometric anomalies in Multimodal geospatial datasets.

Anomaly Classification Data Augmentation +3

Self-Supervised Temporal Analysis of Spatiotemporal Data

no code implementations25 Apr 2023 Yi Cao, Swetava Ganguli, Vipul Pandey

There exists a correlation between geospatial activity temporal patterns and type of land use.

Semantic Segmentation Time Series

Scalable Self-Supervised Representation Learning from Spatiotemporal Motion Trajectories for Multimodal Computer Vision

no code implementations7 Oct 2022 Swetava Ganguli, C. V. Krishnakumar Iyer, Vipul Pandey

In this work, we propose a self-supervised method for learning representations of geographic locations from unlabeled GPS trajectories to solve downstream geospatial computer vision tasks.

Representation Learning Semantic Segmentation

Reachability Embeddings: Scalable Self-Supervised Representation Learning from Mobility Trajectories for Multimodal Geospatial Computer Vision

no code implementations24 Oct 2021 Swetava Ganguli, C. V. Krishnakumar Iyer, Vipul Pandey

In this paper, we propose a self-supervised method for learning representations of geographic locations from unlabeled GPS trajectories to solve downstream geospatial computer vision tasks.

Representation Learning Semantic Segmentation

Conditional Generation of Synthetic Geospatial Images from Pixel-level and Feature-level Inputs

no code implementations11 Sep 2021 Xuerong Xiao, Swetava Ganguli, Vipul Pandey

Synthetically generating data (and labels) using a generative model that can sample from a target distribution and exploit the multi-scale nature of images can be an inexpensive solution to address scarcity of labeled data.

Attribute Data Augmentation +1

Trinity: A No-Code AI platform for complex spatial datasets

no code implementations21 Jun 2021 C. V. Krishnakumar Iyer, Feili Hou, Henry Wang, Yonghong Wang, Kay Oh, Swetava Ganguli, Vipul Pandey

We present a no-code Artificial Intelligence (AI) platform called Trinity with the main design goal of enabling both machine learning researchers and non-technical geospatial domain experts to experiment with domain-specific signals and datasets for solving a variety of complex problems on their own.

Feature Engineering Semantic Segmentation

VAE-Info-cGAN: Generating Synthetic Images by Combining Pixel-level and Feature-level Geospatial Conditional Inputs

no code implementations8 Dec 2020 Xuerong Xiao, Swetava Ganguli, Vipul Pandey

Training robust supervised deep learning models for many geospatial applications of computer vision is difficult due to dearth of class-balanced and diverse training data.

Attribute Data Augmentation +1

Drag of a Heated Sphere at Low Reynolds Numbers in the Presence of Buoyancy

no code implementations21 Sep 2020 Swetava Ganguli, Sanjiva K. Lele

However, the effect of temperature variation on the drag of a sphere in both, forced and natural convection, is significant.

Fluid Dynamics Computational Physics

GeoGAN: A Conditional GAN with Reconstruction and Style Loss to Generate Standard Layer of Maps from Satellite Images

no code implementations14 Feb 2019 Swetava Ganguli, Pedro Garzon, Noa Glaser

Our model translates the satellite image to the corresponding standard layer map image using three main model architectures: (i) a conditional Generative Adversarial Network (GAN) which compresses the images down to a learned embedding, (ii) a generator which is trained as a normalizing flow (RealNVP) model, and (iii) a conditional GAN where the generator translates via a series of convolutions to the standard layer of a map and the discriminator input is the concatenation of the real/generated map and the satellite image.

Generative Adversarial Network Style Transfer

Predicting Food Security Outcomes Using Convolutional Neural Networks (CNNs) for Satellite Tasking

no code implementations13 Feb 2019 Swetava Ganguli, Jared Dunnmon, Darren Hau

Obtaining reliable data describing local Food Security Metrics (FSM) at a granularity that is informative to policy-makers requires expensive and logistically difficult surveys, particularly in the developing world.

General Classification Land Cover Classification +1

Semi-Supervised Multitask Learning on Multispectral Satellite Images Using Wasserstein Generative Adversarial Networks (GANs) for Predicting Poverty

no code implementations13 Feb 2019 Anthony Perez, Swetava Ganguli, Stefano Ermon, George Azzari, Marshall Burke, David Lobell

Obtaining reliable data describing local poverty metrics at a granularity that is informative to policy-makers requires expensive and logistically difficult surveys, particularly in the developing world.

Predicting US State-Level Agricultural Sentiment as a Measure of Food Security with Tweets from Farming Communities

no code implementations13 Feb 2019 Jared Dunnmon, Swetava Ganguli, Darren Hau, Brooke Husic

The ability to obtain accurate food security metrics in developing areas where relevant data can be sparse is critically important for policy makers tasked with implementing food aid programs.

Crop Yield Prediction Sentiment Analysis +2

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