Search Results for author: Poojan Oza

Found 18 papers, 8 papers with code

One-Class Convolutional Neural Network

4 code implementations24 Jan 2019 Poojan Oza, Vishal M. Patel

We present a novel Convolutional Neural Network (CNN) based approach for one class classification.

General Classification Novelty Detection +1

Active Authentication using an Autoencoder regularized CNN-based One-Class Classifier

no code implementations4 Mar 2019 Poojan Oza, Vishal M. Patel

Generally, an active authentication problem is modelled as a one class classification problem due to the unavailability of data from the impostor users.

Classification General Classification +2

Deep CNN-based Multi-task Learning for Open-Set Recognition

no code implementations7 Mar 2019 Poojan Oza, Vishal M. Patel

We propose a novel deep convolutional neural network (CNN) based multi-task learning approach for open-set visual recognition.

General Classification Image Classification +2

C2AE: Class Conditioned Auto-Encoder for Open-set Recognition

no code implementations CVPR 2019 Poojan Oza, Vishal M. Patel

It refers to the problem of identifying the unknown classes during testing, while maintaining performance on the known classes.

Classification General Classification +2

Prior-based Domain Adaptive Object Detection for Hazy and Rainy Conditions

no code implementations ECCV 2020 Vishwanath A. Sindagi, Poojan Oza, Rajeev Yasarla, Vishal M. Patel

Adverse weather conditions such as haze and rain corrupt the quality of captured images, which cause detection networks trained on clean images to perform poorly on these images.

object-detection Object Detection

Anomaly Detection-Based Unknown Face Presentation Attack Detection

1 code implementation11 Jul 2020 Yashasvi Baweja, Poojan Oza, Pramuditha Perera, Vishal M. Patel

Anomaly detection-based spoof attack detection is a recent development in face Presentation Attack Detection (fPAD), where a spoof detector is learned using only non-attacked images of users.

Anomaly Detection Face Presentation Attack Detection +1

One-Class Classification: A Survey

no code implementations8 Jan 2021 Pramuditha Perera, Poojan Oza, Vishal M. Patel

One-Class Classification (OCC) is a special case of multi-class classification, where data observed during training is from a single positive class.

Classification General Classification +2

Medical Transformer: Gated Axial-Attention for Medical Image Segmentation

2 code implementations21 Feb 2021 Jeya Maria Jose Valanarasu, Poojan Oza, Ilker Hacihaliloglu, Vishal M. Patel

The proposed Medical Transformer (MedT) is evaluated on three different medical image segmentation datasets and it is shown that it achieves better performance than the convolutional and other related transformer-based architectures.

Image Segmentation Medical Image Segmentation +2

Federated Learning-based Active Authentication on Mobile Devices

no code implementations14 Apr 2021 Poojan Oza, Vishal M. Patel

Using FL/SL frameworks, we can alleviate the lack of negative data problem by training a user authentication model over multiple user data distributed across devices.

Federated Learning One-Class Classification

Unsupervised Domain Adaptation of Object Detectors: A Survey

no code implementations27 May 2021 Poojan Oza, Vishwanath A. Sindagi, Vibashan VS, Vishal M. Patel

Recent advances in deep learning have led to the development of accurate and efficient models for various computer vision applications such as classification, segmentation, and detection.

Autonomous Navigation Object +3

Image Fusion Transformer

1 code implementation19 Jul 2021 Vibashan VS, Jeya Maria Jose Valanarasu, Poojan Oza, Vishal M. Patel

Furthermore, we show the effectiveness of the proposed ST fusion strategy with an ablation analysis.

Adversarially Robust One-class Novelty Detection

1 code implementation25 Aug 2021 Shao-Yuan Lo, Poojan Oza, Vishal M. Patel

To this end, we propose a defense strategy that manipulates the latent space of novelty detectors to improve the robustness against adversarial examples.

Adversarial Robustness Novelty Detection

Instance Relation Graph Guided Source-Free Domain Adaptive Object Detection

1 code implementation CVPR 2023 Vibashan VS, Poojan Oza, Vishal M. Patel

The Source-Free Domain Adaptation (SFDA) setting aims to alleviate these concerns by adapting a source-trained model for the target domain without requiring access to the source data.

Knowledge Distillation Object +6

Towards Online Domain Adaptive Object Detection

2 code implementations11 Apr 2022 Vibashan VS, Poojan Oza, Vishal M. Patel

To the best of our knowledge, this is the first work to address online and offline adaptation settings for object detection.

Object object-detection +3

Spatio-Temporal Pixel-Level Contrastive Learning-based Source-Free Domain Adaptation for Video Semantic Segmentation

1 code implementation CVPR 2023 Shao-Yuan Lo, Poojan Oza, Sumanth Chennupati, Alejandro Galindo, Vishal M. Patel

Unsupervised Domain Adaptation (UDA) of semantic segmentation transfers labeled source knowledge to an unlabeled target domain by relying on accessing both the source and target data.

Contrastive Learning Semantic Segmentation +3

Utilizing Patch-level Category Activation Patterns for Multiple Class Novelty Detection

no code implementations ECCV 2020 Poojan Oza, Vishal M. Patel

For any recognition system, the ability to identify novel class samples during inference is an important aspect of the system’s robustness.

Novelty Detection

Multiple Class Novelty Detection Under Data Distribution Shift

no code implementations ECCV 2020 Poojan Oza, Hien V. Nguyen, Vishal M. Patel

To this end, we consider the problem of multiple class novelty detection under dataset distribution shift to improve the novelty detection performance.

Domain Adaptation Novelty Detection +1

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