Search Results for author: Sudipan Saha

Found 15 papers, 4 papers with code

Evolution of urban areas and land surface temperature

no code implementations5 Jan 2024 Sudipan Saha, Tushar Verma, Dario Augusto Borges Oliveira

With the global population on the rise, our cities have been expanding to accommodate the growing number of people.

Time Series

Exploring Geometric Deep Learning For Precipitation Nowcasting

no code implementations11 Sep 2023 Shan Zhao, Sudipan Saha, Zhitong Xiong, Niklas Boers, Xiao Xiang Zhu

Motivated by this, we explore a geometric deep learning-based temporal Graph Convolutional Network (GCN) for precipitation nowcasting.

Deep Unsupervised Learning for 3D ALS Point Cloud Change Detection

1 code implementation5 May 2023 Iris de Gélis, Sudipan Saha, Muhammad Shahzad, Thomas Corpetti, Sébastien Lefèvre, Xiao Xiang Zhu

To circumnavigate this dependence, we propose an unsupervised 3D point cloud change detection method mainly based on self-supervised learning using deep clustering and contrastive learning.

Change Detection Contrastive Learning +2

Spatial Context Awareness for Unsupervised Change Detection in Optical Satellite Images

no code implementations5 Oct 2021 Lukas Kondmann, Aysim Toker, Sudipan Saha, Bernhard Schölkopf, Laura Leal-Taixé, Xiao Xiang Zhu

It uses this model to analyze differences in the pixel and its spatial context-based predictions in subsequent time periods for change detection.

Change Detection Earth Observation

Reiterative Domain Aware Multi-Target Adaptation

no code implementations26 Aug 2021 Sudipan Saha, Shan Zhao, Nasrullah Sheikh, Xiao Xiang Zhu

Multi-target domain adaptation is a powerful extension in which a single classifier is learned for multiple unlabeled target domains.

Domain Adaptation Multi-target Domain Adaptation

Segmentation of VHR EO Images using Unsupervised Learning

no code implementations9 Jul 2021 Sudipan Saha, Lichao Mou, Muhammad Shahzad, Xiao Xiang Zhu

The proposed method exploits this property to sample smaller patches from the larger scene and uses deep clustering and contrastive learning to refine the weights of a lightweight deep model composed of a series of the convolution layers along with an embedded channel attention.

Contrastive Learning Deep Clustering +3

Out-of-distribution detection in satellite image classification

no code implementations9 Apr 2021 Jakob Gawlikowski, Sudipan Saha, Anna Kruspe, Xiao Xiang Zhu

In satellite image analysis, distributional mismatch between the training and test data may arise due to several reasons, including unseen classes in the test data and differences in the geographic area.

Classification General Classification +2

Trusting small training dataset for supervised change detection

no code implementations9 Apr 2021 Sudipan Saha, Biplab Banerjee, Xiao Xiang Zhu

Deep learning (DL) based supervised change detection (CD) models require large labeled training data.

Change Detection

Deep Reinforcement Learning for Band Selection in Hyperspectral Image Classification

1 code implementation15 Mar 2021 Lichao Mou, Sudipan Saha, Yuansheng Hua, Francesca Bovolo, Lorenzo Bruzzone, Xiao Xiang Zhu

To this end, we frame the problem of unsupervised band selection as a Markov decision process, propose an effective method to parameterize it, and finally solve the problem by deep reinforcement learning.

Classification General Classification +4

Self-Supervised Multisensor Change Detection

no code implementations12 Feb 2021 Sudipan Saha, Patrick Ebel, Xiao Xiang Zhu

In particular, we are interested in the combination of the images acquired by optical and Synthetic Aperture Radar (SAR) sensors.

BIG-bench Machine Learning Change Detection +3

Towards Bridging the gap between Empirical and Certified Robustness against Adversarial Examples

no code implementations9 Feb 2021 Jay Nandy, Sudipan Saha, Wynne Hsu, Mong Li Lee, Xiao Xiang Zhu

In this paper, we propose a novel method, called \emph{Certification through Adaptation}, that transforms an AT model into a randomized smoothing classifier during inference to provide certified robustness for $\ell_2$ norm without affecting their empirical robustness against adversarial attacks.

Adversarial Robustness

Ultrasound Image Classification using ACGAN with Small Training Dataset

1 code implementation31 Jan 2021 Sudipan Saha, Nasrullah Sheikh

The lack of large labeled data is a bottleneck for the use of deep learning in ultrasound image analysis.

Classification Data Augmentation +4

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