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Sachin Mehta

15 accepted papers

2025

CtrlSynth: Controllable Image Text Synthesis for Data-Efficient Multimodal Learning

ICML 2025poster

Pretraining robust vision or multimodal foundation models (e.g., CLIP) relies on large-scale datasets that may be noisy, potentially misaligned, and have long-tail distributions. Previous works have shown promising results in augmenting datasets by generating synthetic samples. However, they only su…

Cited by 2SourcePDFScholar
2025

SeedLM: Compressing LLM Weights into Seeds of Pseudo-Random Generators

ICLR 2025poster

Large Language Models (LLMs) have transformed natural language processing, but face significant challenges in widespread deployment due to their high runtime cost. In this paper, we introduce SeedLM, a novel post-training compression method that uses seeds of a pseudo-random generator to encode and…

Cited by 0SourcePDFScholar
2025

TiC-LM: A Web-Scale Benchmark for Time-Continual LLM Pretraining

ACL 2025long

Large Language Models (LLMs) trained on historical web data inevitably become outdated. We investigate evaluation strategies and update methods for LLMs as new data becomes available. We introduce a web-scale dataset for time-continual pretraining of LLMs derived from 114 dumps of Common Crawl (CC)…

2024

Knowledge Transfer from Vision Foundation Models for Efficient Training of Small Task-specific Models

ICML 2024poster

Vision Foundation Models (VFMs) pretrained on massive datasets exhibit impressive performance on various downstream tasks, especially with limited labeled target data. However, due to their high inference compute cost, these models cannot be deployed for many real-world applications. Motivated by th…

2024

ReLU Strikes Back: Exploiting Activation Sparsity in Large Language Models

ICLR 2024oral

Large Language Models (LLMs) with billions of parameters have drastically transformed AI applications. However, their demanding computation during inference has raised significant challenges for deployment on resource-constrained devices. Despite recent trends favoring alternative activation functio…

Cited by 85SourcePDFScholar
2024

TiC-CLIP: Continual Training of CLIP Models

ICLR 2024poster

Keeping large foundation models up to date on latest data is inherently expensive. To avoid the prohibitive costs of constantly retraining, it is imperative to continually train these models. This problem is exacerbated by the lack of any large scale continual learning benchmarks or baselines. We in…

2023

Reinforce Data, Multiply Impact: Improved Model Accuracy and Robustness with Dataset Reinforcement

ICCV 2023poster

We propose Dataset Reinforcement, a strategy to improve a dataset once such that the accuracy of any model architecture trained on the reinforced dataset is improved at no additional training cost for users. We propose a Dataset Reinforcement strategy based on data augmentation and knowledge distill…

Cited by 11PDFcodeScholar
2023

SHARCS: Efficient Transformers Through Routing with Dynamic Width Sub-networks

EMNLP 2023short findings

We introduce SHARCS for adaptive inference that takes into account the hardness of input samples. SHARCS can train a router on any transformer network, enabling the model to direct different samples to sub-networks with varying widths. Our experiments demonstrate that: (1) SHARCS outperforms or comp…

Cited by 0SourceScholar
2022

MobileViT: Light-weight, General-purpose, and Mobile-friendly Vision Transformer

ICLR 2022poster

Light-weight convolutional neural networks (CNNs) are the de-facto for mobile vision tasks. Their spatial inductive biases allow them to learn representations with fewer parameters across different vision tasks. However, these networks are spatially local. To learn global representations, self-atten…

2022

SPIN: An Empirical Evaluation on Sharing Parameters of Isotropic Networks

ECCV 2022poster

"Recent isotropic networks, such as ConvMixer and Vision Transformers, have found significant success across visual recognition tasks, matching or outperforming non-isotropic Convolutional Neural Networks. Isotropic architectures are particularly well-suited to cross-layer weight sharing, an effecti…

2021

DeLighT: Deep and Light-weight Transformer

ICLR 2021poster

We introduce a deep and light-weight transformer, DeLighT, that delivers similar or better performance than standard transformer-based models with significantly fewer parameters. DeLighT more efficiently allocates parameters both (1) within each Transformer block using the DeLighT transformation, a…

2021

Iconary: A Pictionary-Based Game for Testing Multimodal Communication with Drawings and Text

EMNLP 2021main

Communicating with humans is challenging for AIs because it requires a shared understanding of the world, complex semantics (e.g., metaphors or analogies), and at times multi-modal gestures (e.g., pointing with a finger, or an arrow in a diagram). We investigate these challenges in the context of Ic…

2020

DeFINE: Deep Factorized Input Token Embeddings for Neural Sequence Modeling

ICLR 2020poster

For sequence models with large vocabularies, a majority of network parameters lie in the input and output layers. In this work, we describe a new method, DeFINE, for learning deep token representations efficiently. Our architecture uses a hierarchical structure with novel skip-connections which allo…

Cited by 28SourcecodeScholar
2019

ESPNetv2: A Light-Weight, Power Efficient, and General Purpose Convolutional Neural Network

CVPR 2019poster

We introduce a light-weight, power efficient, and general purpose convolutional neural network, ESPNetv2, for modeling visual and sequential data. Our network uses group point-wise and depth-wise dilated separable convolutions to learn representations from a large effective receptive field with fewe…

Cited by 600PDFcodeScholar
2018

ESPNet: Efficient Spatial Pyramid of Dilated Convolutions for Semantic Segmentation

ECCV 2018poster

We introduce a fast and efficient convolutional neural network, ESPNet, for semantic segmentation of high resolution images under resource constraints. ESPNet is based on a new convolutional module, efficient spatial pyramid (ESP), which is efficient in terms of computation, memory, and power. ESPNe…