Search Results for author: Otkrist Gupta

Found 16 papers, 6 papers with code

MRZ code extraction from visa and passport documents using convolutional neural networks

1 code implementation11 Sep 2020 Yichuan Liu, Hailey James, Otkrist Gupta, Dan Raviv

Detecting and extracting information from Machine-Readable Zone (MRZ) on passports and visas is becoming increasingly important for verifying document authenticity.

Optical Character Recognition Optical Character Recognition (OCR)

OCR Graph Features for Manipulation Detection in Documents

no code implementations10 Sep 2020 Hailey James, Otkrist Gupta, Dan Raviv

Detecting manipulations in digital documents is becoming increasingly important for information verification purposes.

Optical Character Recognition Optical Character Recognition (OCR)

NoPeek: Information leakage reduction to share activations in distributed deep learning

1 code implementation20 Aug 2020 Praneeth Vepakomma, Abhishek Singh, Otkrist Gupta, Ramesh Raskar

For distributed machine learning with sensitive data, we demonstrate how minimizing distance correlation between raw data and intermediary representations reduces leakage of sensitive raw data patterns across client communications while maintaining model accuracy.

Printing and Scanning Attack for Image Counter Forensics

no code implementations27 Apr 2020 Hailey James, Otkrist Gupta, Dan Raviv

Of the three models, our proposed model outperforms the others when trained and validated on images from a single printer.

Image Manipulation

Maximal adversarial perturbations for obfuscation: Hiding certain attributes while preserving rest

no code implementations27 Sep 2019 Indu Ilanchezian, Praneeth Vepakomma, Abhishek Singh, Otkrist Gupta, G. N. Srinivasa Prasanna, Ramesh Raskar

In this paper we investigate the usage of adversarial perturbations for the purpose of privacy from human perception and model (machine) based detection.

Attribute Data Poisoning

Detailed comparison of communication efficiency of split learning and federated learning

no code implementations18 Sep 2019 Abhishek Singh, Praneeth Vepakomma, Otkrist Gupta, Ramesh Raskar

We compare communication efficiencies of two compelling distributed machine learning approaches of split learning and federated learning.

Federated Learning

No Peek: A Survey of private distributed deep learning

no code implementations8 Dec 2018 Praneeth Vepakomma, Tristan Swedish, Ramesh Raskar, Otkrist Gupta, Abhimanyu Dubey

We survey distributed deep learning models for training or inference without accessing raw data from clients.

Federated Learning

Maximum-Entropy Fine Grained Classification

no code implementations NeurIPS 2018 Abhimanyu Dubey, Otkrist Gupta, Ramesh Raskar, Nikhil Naik

Fine-Grained Visual Classification (FGVC) is an important computer vision problem that involves small diversity within the different classes, and often requires expert annotators to collect data.

Ranked #19 on Fine-Grained Image Classification on NABirds (using extra training data)

Classification Fine-Grained Image Classification +1

Distributed learning of deep neural network over multiple agents

no code implementations14 Oct 2018 Otkrist Gupta, Ramesh Raskar

Our algorithm paves the way for distributed training of deep neural networks in data sensitive applications when raw data may not be shared directly.

Maximum-Entropy Fine-Grained Classification

no code implementations16 Sep 2018 Abhimanyu Dubey, Otkrist Gupta, Ramesh Raskar, Nikhil Naik

Fine-Grained Visual Classification (FGVC) is an important computer vision problem that involves small diversity within the different classes, and often requires expert annotators to collect data.

Classification Fine-Grained Image Classification +1

Accelerating Neural Architecture Search using Performance Prediction

2 code implementations ICLR 2018 Bowen Baker, Otkrist Gupta, Ramesh Raskar, Nikhil Naik

Methods for neural network hyperparameter optimization and meta-modeling are computationally expensive due to the need to train a large number of model configurations.

Hyperparameter Optimization Language Modelling +3

Designing Neural Network Architectures using Reinforcement Learning

5 code implementations7 Nov 2016 Bowen Baker, Otkrist Gupta, Nikhil Naik, Ramesh Raskar

We introduce MetaQNN, a meta-modeling algorithm based on reinforcement learning to automatically generate high-performing CNN architectures for a given learning task.

General Classification Image Classification +3

Multi-velocity neural networks for gesture recognition in videos

no code implementations22 Mar 2016 Otkrist Gupta, Dan Raviv, Ramesh Raskar

We present a new action recognition deep neural network which adaptively learns the best action velocities in addition to the classification.

Action Recognition General Classification +2

Deep video gesture recognition using illumination invariants

no code implementations21 Mar 2016 Otkrist Gupta, Dan Raviv, Ramesh Raskar

In this paper we present architectures based on deep neural nets for gesture recognition in videos, which are invariant to local scaling.

Gesture Recognition

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