Search Results for author: Mahdyar Ravanbakhsh

Found 20 papers, 4 papers with code

LiT-4-RSVQA: Lightweight Transformer-based Visual Question Answering in Remote Sensing

no code implementations1 Jun 2023 Leonard Hackel, Kai Norman Clasen, Mahdyar Ravanbakhsh, Begüm Demir

Visual question answering (VQA) methods in remote sensing (RS) aim to answer natural language questions with respect to an RS image.

Question Answering Visual Question Answering

Multi-Modal Fusion Transformer for Visual Question Answering in Remote Sensing

no code implementations10 Oct 2022 Tim Siebert, Kai Norman Clasen, Mahdyar Ravanbakhsh, Begüm Demir

To make the intrinsic information of each RS image easily accessible, visual question answering (VQA) has been introduced in RS.

Question Answering Representation Learning +1

Advanced Deep Learning Architectures for Accurate Detection of Subsurface Tile Drainage Pipes from Remote Sensing Images

no code implementations5 Oct 2022 Tom-Lukas Breitkopf, Leonard W. Hackel, Mahdyar Ravanbakhsh, Anne-Karin Cooke, Sandra Willkommen, Stefan Broda, Begüm Demir

In this study, we introduce two DL-based models: i) improved U-Net architecture; and ii) Visual Transformer-based encoder-decoder in the framework of tile drainage pipe detection.

Nutrition

On the Effects of Different Types of Label Noise in Multi-Label Remote Sensing Image Classification

no code implementations28 Jul 2022 Tom Burgert, Mahdyar Ravanbakhsh, Begüm Demir

In this paper, we investigate three different noise robust CV SLC methods and adapt them to be robust for multi-label noise scenarios in RS.

Image Classification Multi-Label Classification +1

Unsupervised Contrastive Hashing for Cross-Modal Retrieval in Remote Sensing

no code implementations19 Apr 2022 Georgii Mikriukov, Mahdyar Ravanbakhsh, Begüm Demir

To address this problem, in this paper we introduce a novel unsupervised cross-modal contrastive hashing (DUCH) method for text-image retrieval in RS.

Binarization Cross-Modal Retrieval +2

An Unsupervised Cross-Modal Hashing Method Robust to Noisy Training Image-Text Correspondences in Remote Sensing

1 code implementation26 Feb 2022 Georgii Mikriukov, Mahdyar Ravanbakhsh, Begüm Demir

The proposed CHNR includes two training phases: i) meta-learning phase that uses a small portion of clean (i. e., reliable) data to train the noise detection module in an adversarial fashion; and ii) the main training phase for which the trained noise detection module is used to identify noisy correspondences while the hashing module is trained on the noisy multi-modal training set.

Meta-Learning Retrieval +1

Deep Unsupervised Contrastive Hashing for Large-Scale Cross-Modal Text-Image Retrieval in Remote Sensing

no code implementations20 Jan 2022 Georgii Mikriukov, Mahdyar Ravanbakhsh, Begüm Demir

To address this problem, in this paper we introduce a novel deep unsupervised cross-modal contrastive hashing (DUCH) method for RS text-image retrieval.

Binarization Cross-Modal Retrieval +2

A Consensual Collaborative Learning Method for Remote Sensing Image Classification Under Noisy Multi-Labels

1 code implementation12 May 2021 Ahmet Kerem Aksoy, Mahdyar Ravanbakhsh, Tristan Kreuziger, Begum Demir

The proposed CCML identifies, ranks and corrects training images with noisy multi-labels through four main modules: 1) discrepancy module; 2) group lasso module; 3) flipping module; and 4) swap module.

Image Classification Multi-Label Classification +2

Multi-Label Noise Robust Collaborative Learning for Remote Sensing Image Classification

1 code implementation19 Dec 2020 Ahmet Kerem Aksoy, Mahdyar Ravanbakhsh, Begüm Demir

To address this problem, the publicly available thematic products, which can include noisy labels, can be used to annotate RS images with zero-labeling cost.

Image Classification Multi-Label Classification +2

Generative Models for Novelty Detection: Applications in abnormal event and situational change detection from data series

no code implementations9 Apr 2019 Mahdyar Ravanbakhsh

Novelty detection is one of the fundamental requirements of a good classification or identification system since sometimes the test data contains observations that were not known at the training time.

Change Detection Novelty Detection +1

Hierarchy of GANs for learning embodied self-awareness model

no code implementations8 Jun 2018 Mahdyar Ravanbakhsh, Mohamad Baydoun, Damian Campo, Pablo Marin, David Martin, Lucio Marcenaro, Carlo S. Regazzoni

In this work, a hierarchical model is introduced by means of a cross-modal Generative Adversarial Networks (GANs) processing high dimensional visual data.

A Multi-perspective Approach To Anomaly Detection For Self-aware Embodied Agents

no code implementations17 Mar 2018 Mohamad Baydoun, Mahdyar Ravanbakhsh, Damian Campo, Pablo Marin, David Martin, Lucio Marcenaro, Andrea Cavallaro, Carlo S. Regazzoni

This paper focuses on multi-sensor anomaly detection for moving cognitive agents using both external and private first-person visual observations.

Anomaly Detection

Efficient Convolutional Neural Network with Binary Quantization Layer

no code implementations21 Nov 2016 Mahdyar Ravanbakhsh, Hossein Mousavi, Moin Nabi, Lucio Marcenaro, Carlo Regazzoni

We use binary encoding of CNN features to overcome the difficulty of the clustering on the high-dimensional CNN feature space.

Clustering Image Segmentation +3

Plug-and-Play CNN for Crowd Motion Analysis: An Application in Abnormal Event Detection

no code implementations2 Oct 2016 Mahdyar Ravanbakhsh, Moin Nabi, Hossein Mousavi, Enver Sangineto, Nicu Sebe

In this paper, we show that keeping track of the changes in the CNN feature across time can facilitate capturing the local abnormality.

Anomaly Detection Event Detection +1

CNN-aware Binary Map for General Semantic Segmentation

no code implementations29 Sep 2016 Mahdyar Ravanbakhsh, Hossein Mousavi, Moin Nabi, Mohammad Rastegari, Carlo Regazzoni

To the best of our knowledge our method is the first attempt on general semantic image segmentation using CNN.

Clustering Image Segmentation +2

Action Recognition with Image Based CNN Features

no code implementations13 Dec 2015 Mahdyar Ravanbakhsh, Hossein Mousavi, Mohammad Rastegari, Vittorio Murino, Larry S. Davis

Action recognition tasks usually relies on complex handcrafted structures as features to represent the human action model.

Action Recognition Temporal Action Localization

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