Search Results for author: Srikumar Ramalingam

Found 42 papers, 12 papers with code

On Distributed Larger-Than-Memory Subset Selection With Pairwise Submodular Functions

no code implementations26 Feb 2024 Maximilian Böther, Abraham Sebastian, Pranjal Awasthi, Ana Klimovic, Srikumar Ramalingam

In this paper, we relax the requirement of having a central machine for the target subset by proposing a novel distributed bounding algorithm with provable approximation guarantees.

Simulated Overparameterization

no code implementations7 Feb 2024 Hanna Mazzawi, Pranjal Awasthi, Xavi Gonzalvo, Srikumar Ramalingam

Building upon this framework, we present a novel, architecture agnostic algorithm called "majority kernels", which seamlessly integrates with predominant architectures, including Transformer models.

Combinatorial Optimization Computational Efficiency

A Weighted K-Center Algorithm for Data Subset Selection

no code implementations17 Dec 2023 Srikumar Ramalingam, Pranjal Awasthi, Sanjiv Kumar

The success of deep learning hinges on enormous data and large models, which require labor-intensive annotations and heavy computation costs.

Rethinking FID: Towards a Better Evaluation Metric for Image Generation

2 code implementations30 Nov 2023 Sadeep Jayasumana, Srikumar Ramalingam, Andreas Veit, Daniel Glasner, Ayan Chakrabarti, Sanjiv Kumar

It is an unbiased estimator that does not make any assumptions on the probability distribution of the embeddings and is sample efficient.

Image Generation

Leveraging Importance Weights in Subset Selection

no code implementations28 Jan 2023 Gui Citovsky, Giulia Desalvo, Sanjiv Kumar, Srikumar Ramalingam, Afshin Rostamizadeh, Yunjuan Wang

In such a setting, an algorithm can sample examples one at a time but, in order to limit overhead costs, is only able to update its state (i. e. further train model weights) once a large enough batch of examples is selected.

Active Learning

When does mixup promote local linearity in learned representations?

no code implementations28 Oct 2022 Arslan Chaudhry, Aditya Krishna Menon, Andreas Veit, Sadeep Jayasumana, Srikumar Ramalingam, Sanjiv Kumar

Towards this, we study two questions: (1) how does the Mixup loss that enforces linearity in the \emph{last} network layer propagate the linearity to the \emph{earlier} layers?

Representation Learning

The Combinatorial Brain Surgeon: Pruning Weights That Cancel One Another in Neural Networks

1 code implementation9 Mar 2022 Xin Yu, Thiago Serra, Srikumar Ramalingam, Shandian Zhe

We propose a tractable heuristic for solving the combinatorial extension of OBS, in which we select weights for simultaneous removal, as well as a systematic update of the remaining weights.

Approximate Bijective Correspondence for isolating factors of variation

1 code implementation29 Sep 2021 Kieran A Murphy, Varun Jampani, Srikumar Ramalingam, Ameesh Makadia

We propose a novel algorithm that relies on a weak form of supervision where the data is partitioned into sets according to certain \textit{inactive} factors of variation.

Contrastive Learning Data Augmentation +1

Model-Efficient Deep Learning with Kernelized Classification

no code implementations29 Sep 2021 Sadeep Jayasumana, Srikumar Ramalingam, Sanjiv Kumar

We investigate the possibility of using the embeddings produced by a lightweight network more effectively with a nonlinear classification layer.

Classification

Less data is more: Selecting informative and diverse subsets with balancing constraints

no code implementations29 Sep 2021 Srikumar Ramalingam, Daniel Glasner, Kaushal Patel, Raviteja Vemulapalli, Sadeep Jayasumana, Sanjiv Kumar

Deep learning has yielded extraordinary results in vision and natural language processing, but this achievement comes at a cost.

Implicit-PDF: Non-Parametric Representation of Probability Distributions on the Rotation Manifold

2 code implementations10 Jun 2021 Kieran Murphy, Carlos Esteves, Varun Jampani, Srikumar Ramalingam, Ameesh Makadia

Single image pose estimation is a fundamental problem in many vision and robotics tasks, and existing deep learning approaches suffer by not completely modeling and handling: i) uncertainty about the predictions, and ii) symmetric objects with multiple (sometimes infinite) correct poses.

3D Pose Estimation 3D Rotation Estimation

Balancing Robustness and Sensitivity using Feature Contrastive Learning

no code implementations19 May 2021 Seungyeon Kim, Daniel Glasner, Srikumar Ramalingam, Cho-Jui Hsieh, Kishore Papineni, Sanjiv Kumar

It is generally believed that robust training of extremely large networks is critical to their success in real-world applications.

Contrastive Learning

Less is more: Selecting informative and diverse subsets with balancing constraints

no code implementations26 Apr 2021 Srikumar Ramalingam, Daniel Glasner, Kaushal Patel, Raviteja Vemulapalli, Sadeep Jayasumana, Sanjiv Kumar

Deep learning has yielded extraordinary results in vision and natural language processing, but this achievement comes at a cost.

Image Classification

Learning ABCs: Approximate Bijective Correspondence for isolating factors of variation with weak supervision

1 code implementation CVPR 2022 Kieran A. Murphy, Varun Jampani, Srikumar Ramalingam, Ameesh Makadia

We propose a novel algorithm that utilizes a weak form of supervision where the data is partitioned into sets according to certain inactive (common) factors of variation which are invariant across elements of each set.

Data Augmentation Pose Transfer

Scaling Up Exact Neural Network Compression by ReLU Stability

1 code implementation NeurIPS 2021 Thiago Serra, Xin Yu, Abhinav Kumar, Srikumar Ramalingam

We can compress a rectifier network while exactly preserving its underlying functionality with respect to a given input domain if some of its neurons are stable.

Neural Network Compression

Leveraging affinity cycle consistency to isolate factors of variation in learned representations

no code implementations1 Jan 2021 Kieran A Murphy, Varun Jampani, Srikumar Ramalingam, Ameesh Makadia

In this work, we operate in the setting where limited information is known about the data in the form of groupings, or set membership, and the task is to learn representations which isolate the factors of variation that are common across the groupings.

Pose Transfer Representation Learning

Mapping of Sparse 3D Data using Alternating Projection

no code implementations4 Oct 2020 Siddhant Ranade, Xin Yu, Shantnu Kakkar, Pedro Miraldo, Srikumar Ramalingam

We propose a novel technique to register sparse 3D scans in the absence of texture.

Lossless Compression of Deep Neural Networks

no code implementations1 Jan 2020 Thiago Serra, Abhinav Kumar, Srikumar Ramalingam

Deep neural networks have been successful in many predictive modeling tasks, such as image and language recognition, where large neural networks are often used to obtain good accuracy.

Can generalised relative pose estimation solve sparse 3D registration?

no code implementations13 Jun 2019 Siddhant Ranade, Xin Yu, Shantnu Kakkar, Pedro Miraldo, Srikumar Ramalingam

In contrast to correspondence based methods, we take a different viewpoint and formulate the sparse 3D registration problem based on the constraints from the intersection of line segments from adjacent scans.

Pose Estimation

Equivalent and Approximate Transformations of Deep Neural Networks

no code implementations27 May 2019 Abhinav Kumar, Thiago Serra, Srikumar Ramalingam

On the practical side, we show that certain rectified linear units (ReLUs) can be safely removed from a network if they are always active or inactive for any valid input.

Minimal Solvers for Mini-Loop Closures in 3D Multi-Scan Alignment

no code implementations CVPR 2019 Pedro Miraldo, Surojit Saha, Srikumar Ramalingam

3D scan registration is a classical, yet a highly useful problem in the context of 3D sensors such as Kinect and Velodyne.

3DRegNet: A Deep Neural Network for 3D Point Registration

1 code implementation CVPR 2020 G. Dias Pais, Srikumar Ramalingam, Venu Madhav Govindu, Jacinto C. Nascimento, Rama Chellappa, Pedro Miraldo

Given a set of 3D point correspondences, we build a deep neural network to address the following two challenges: (i) classification of the point correspondences into inliers/outliers, and (ii) regression of the motion parameters that align the scans into a common reference frame.

regression

Empirical Bounds on Linear Regions of Deep Rectifier Networks

no code implementations ICLR 2019 Thiago Serra, Srikumar Ramalingam

Our first contribution is a method to sample the activation patterns defined by ReLUs using universal hash functions.

Novel Single View Constraints for Manhattan 3D Line Reconstruction

no code implementations8 Oct 2018 Siddhant Ranade, Srikumar Ramalingam

We treat the line segments in the image to be part of a graph similar to straws and connectors game, where the goal is to back-project the line segments in 3D space and while ensuring that some of these 3D line segments connect with each other (i. e., truly intersect in 3D space) to form the 3D structure.

Simultaneous Edge Alignment and Learning

3 code implementations ECCV 2018 Zhiding Yu, Weiyang Liu, Yang Zou, Chen Feng, Srikumar Ramalingam, B. V. K. Vijaya Kumar, Jan Kautz

Edge detection is among the most fundamental vision problems for its role in perceptual grouping and its wide applications.

Edge Detection Representation Learning

VLASE: Vehicle Localization by Aggregating Semantic Edges

1 code implementation6 Jul 2018 Xin Yu, Sagar Chaturvedi, Chen Feng, Yuichi Taguchi, Teng-Yok Lee, Clinton Fernandes, Srikumar Ramalingam

In this paper, we propose VLASE, a framework to use semantic edge features from images to achieve on-road localization.

Image Retrieval Retrieval

How Could Polyhedral Theory Harness Deep Learning?

no code implementations17 Jun 2018 Thiago Serra, Christian Tjandraatmadja, Srikumar Ramalingam

The holy grail of deep learning is to come up with an automatic method to design optimal architectures for different applications.

Analytical Modeling of Vanishing Points and Curves in Catadioptric Cameras

no code implementations CVPR 2018 Pedro Miraldo, Francisco Eiras, Srikumar Ramalingam

Vanishing points and vanishing lines are classical geometrical concepts in perspective cameras that have a lineage dating back to 3 centuries.

Pose Estimation

Learning Strict Identity Mappings in Deep Residual Networks

1 code implementation CVPR 2018 Xin Yu, Zhiding Yu, Srikumar Ramalingam

A family of super deep networks, referred to as residual networks or ResNet, achieved record-beating performance in various visual tasks such as image recognition, object detection, and semantic segmentation.

object-detection Object Detection +1

Class Subset Selection for Transfer Learning using Submodularity

no code implementations30 Mar 2018 Varun Manjunatha, Srikumar Ramalingam, Tim K. Marks, Larry Davis

To accomplish this, we use a submodular set function to model the accuracy achievable on a new task when the features have been learned on a given subset of classes of the source dataset.

Image Classification Transfer Learning

Bounding and Counting Linear Regions of Deep Neural Networks

no code implementations6 Nov 2017 Thiago Serra, Christian Tjandraatmadja, Srikumar Ramalingam

We investigate the complexity of deep neural networks (DNN) that represent piecewise linear (PWL) functions.

CASENet: Deep Category-Aware Semantic Edge Detection

11 code implementations CVPR 2017 Zhiding Yu, Chen Feng, Ming-Yu Liu, Srikumar Ramalingam

To this end, we propose a novel end-to-end deep semantic edge learning architecture based on ResNet and a new skip-layer architecture where category-wise edge activations at the top convolution layer share and are fused with the same set of bottom layer features.

Edge Detection Object Proposal Generation +1

High-Performance and Tunable Stereo Reconstruction

no code implementations3 Nov 2015 Sudeep Pillai, Srikumar Ramalingam, John J. Leonard

Traditional stereo algorithms have focused their efforts on reconstruction quality and have largely avoided prioritizing for run time performance.

Disparity Estimation Stereo Disparity Estimation +1

Layered Interpretation of Street View Images

no code implementations15 Jun 2015 Ming-Yu Liu, Shuoxin Lin, Srikumar Ramalingam, Oncel Tuzel

We propose a layered street view model to encode both depth and semantic information on street view images for autonomous driving.

Autonomous Driving Scene Labeling +1

Single Image Calibration of Multi-axial Imaging Systems

no code implementations CVPR 2013 Amit Agrawal, Srikumar Ramalingam

We describe such setups as multi-axial imaging systems, since a single sphere results in an axial system.

Camera Calibration Pose Estimation

Efficient Minimization of Higher Order Submodular Functions using Monotonic Boolean Functions

no code implementations11 Sep 2011 Srikumar Ramalingam, Chris Russell, Lubor Ladicky, Philip H. S. Torr

E +n^4 {\log}^{O(1)} n)$ where $E$ is the time required to evaluate the function and $n$ is the number of variables \cite{Lee2015}.

BIG-bench Machine Learning

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