Search Results for author: Nikhil Naik

Found 27 papers, 14 papers with code

BootPIG: Bootstrapping Zero-shot Personalized Image Generation Capabilities in Pretrained Diffusion Models

1 code implementation25 Jan 2024 Senthil Purushwalkam, Akash Gokul, Shafiq Joty, Nikhil Naik

We propose a novel architecture (BootPIG) that allows a user to provide reference images of an object in order to guide the appearance of a concept in the generated images.

Image Segmentation Semantic Segmentation +1

Diffusion Model Alignment Using Direct Preference Optimization

no code implementations21 Nov 2023 Bram Wallace, Meihua Dang, Rafael Rafailov, Linqi Zhou, Aaron Lou, Senthil Purushwalkam, Stefano Ermon, Caiming Xiong, Shafiq Joty, Nikhil Naik

Large language models (LLMs) are fine-tuned using human comparison data with Reinforcement Learning from Human Feedback (RLHF) methods to make them better aligned with users' preferences.

End-to-End Diffusion Latent Optimization Improves Classifier Guidance

1 code implementation ICCV 2023 Bram Wallace, Akash Gokul, Stefano Ermon, Nikhil Naik

Classifier guidance -- using the gradients of an image classifier to steer the generations of a diffusion model -- has the potential to dramatically expand the creative control over image generation and editing.

Denoising Image Generation

EDICT: Exact Diffusion Inversion via Coupled Transformations

2 code implementations CVPR 2023 Bram Wallace, Akash Gokul, Nikhil Naik

EDICT enables mathematically exact inversion of real and model-generated images by maintaining two coupled noise vectors which are used to invert each other in an alternating fashion.

Denoising Image Reconstruction +3

ProGen2: Exploring the Boundaries of Protein Language Models

4 code implementations27 Jun 2022 Erik Nijkamp, Jeffrey Ruffolo, Eli N. Weinstein, Nikhil Naik, Ali Madani

Attention-based models trained on protein sequences have demonstrated incredible success at classification and generation tasks relevant for artificial intelligence-driven protein design.

Protein Design

Can domain adaptation make object recognition work for everyone?

no code implementations23 Apr 2022 Viraj Prabhu, Ramprasaath R. Selvaraju, Judy Hoffman, Nikhil Naik

Despite the rapid progress in deep visual recognition, modern computer vision datasets significantly overrepresent the developed world and models trained on such datasets underperform on images from unseen geographies.

Object Object Recognition +1

CLIP-Lite: Information Efficient Visual Representation Learning with Language Supervision

1 code implementation14 Dec 2021 Aman Shrivastava, Ramprasaath R. Selvaraju, Nikhil Naik, Vicente Ordonez

We propose CLIP-Lite, an information efficient method for visual representation learning by feature alignment with textual annotations.

Contrastive Learning Representation Learning +5

PreViTS: Contrastive Pretraining with Video Tracking Supervision

no code implementations1 Dec 2021 Brian Chen, Ramprasaath R. Selvaraju, Shih-Fu Chang, Juan Carlos Niebles, Nikhil Naik

In this work, we propose PreViTS, an SSL framework that utilizes an unsupervised tracking signal for selecting clips containing the same object, which helps better utilize temporal transformations of objects.

Action Classification Self-Supervised Learning +1

Don’t throw away that linear head: Few-shot protein fitness prediction with generative models

no code implementations29 Sep 2021 Ben Krause, Nikhil Naik, Wenhao Liu, Ali Madani

Predicting the fitness, i. e. functional value, of a protein sequence is an important and challenging task in biology, particularly due to the scarcity of assay-labeled data.

Transfer Learning

Deep Extrapolation for Attribute-Enhanced Generation

1 code implementation NeurIPS 2021 Alvin Chan, Ali Madani, Ben Krause, Nikhil Naik

Attribute extrapolation in sample generation is challenging for deep neural networks operating beyond the training distribution.

Attribute

The AI Economist: Improving Equality and Productivity with AI-Driven Tax Policies

2 code implementations28 Apr 2020 Stephan Zheng, Alexander Trott, Sunil Srinivasa, Nikhil Naik, Melvin Gruesbeck, David C. Parkes, Richard Socher

In experiments conducted on MTurk, an AI tax policy provides an equality-productivity trade-off that is similar to that provided by the Saez framework along with higher inverse-income weighted social welfare.

Improving out-of-distribution generalization via multi-task self-supervised pretraining

no code implementations30 Mar 2020 Isabela Albuquerque, Nikhil Naik, Junnan Li, Nitish Keskar, Richard Socher

Self-supervised feature representations have been shown to be useful for supervised classification, few-shot learning, and adversarial robustness.

Adversarial Robustness Domain Generalization +4

ProGen: Language Modeling for Protein Generation

2 code implementations8 Mar 2020 Ali Madani, Bryan McCann, Nikhil Naik, Nitish Shirish Keskar, Namrata Anand, Raphael R. Eguchi, Po-Ssu Huang, Richard Socher

Generative modeling for protein engineering is key to solving fundamental problems in synthetic biology, medicine, and material science.

Language Modelling

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

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

Deep Learning the City : Quantifying Urban Perception At A Global Scale

1 code implementation5 Aug 2016 Abhimanyu Dubey, Nikhil Naik, Devi Parikh, Ramesh Raskar, César A. Hidalgo

Computer vision methods that quantify the perception of urban environment are increasingly being used to study the relationship between a city's physical appearance and the behavior and health of its residents.

General Classification

Are Safer Looking Neighborhoods More Lively? A Multimodal Investigation into Urban Life

1 code implementation1 Aug 2016 Marco De Nadai, Radu L. Vieriu, Gloria Zen, Stefan Dragicevic, Nikhil Naik, Michele Caraviello, Cesar A. Hidalgo, Nicu Sebe, Bruno Lepri

But in a world where the preference for safe looking neighborhoods is small, the connection between the perception of safety and liveliness will be either weak or nonexistent.

Computers and Society Social and Information Networks Physics and Society

Coreset-Based Adaptive Tracking

no code implementations19 Nov 2015 Abhimanyu Dubey, Nikhil Naik, Dan Raviv, Rahul Sukthankar, Ramesh Raskar

We propose a method for learning from streaming visual data using a compact, constant size representation of all the data that was seen until a given moment.

Object Object Tracking

A Light Transport Model for Mitigating Multipath Interference in Time-of-Flight Sensors

no code implementations CVPR 2015 Nikhil Naik, Achuta Kadambi, Christoph Rhemann, Shahram Izadi, Ramesh Raskar, Sing Bing Kang

Continuous-wave Time-of-flight (TOF) range imaging has become a commercially viable technology with many applications in computer vision and graphics.

A Light Transport Model for Mitigating Multipath Interference in TOF Sensors

no code implementations CVPR 2015 Nikhil Naik, Achuta Kadambi, Christoph Rhemann, Shahram Izadi, Ramesh Raskar, Sing Bing Kang

Continuous-wave Time-of-flight (TOF) range imaging has become a commercially viable technology with many applications in computer vision and graphics.

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