Search Results for author: Matthew Walmer

Found 6 papers, 4 papers with code

LiFT: A Surprisingly Simple Lightweight Feature Transform for Dense ViT Descriptors

no code implementations21 Mar 2024 Saksham Suri, Matthew Walmer, Kamal Gupta, Abhinav Shrivastava

We present a simple self-supervised method to enhance the performance of ViT features for dense downstream tasks.

Object Discovery

Multi-entity Video Transformers for Fine-Grained Video Representation Learning

1 code implementation17 Nov 2023 Matthew Walmer, Rose Kanjirathinkal, Kai Sheng Tai, Keyur Muzumdar, Taipeng Tian, Abhinav Shrivastava

In this work, we advance the state-of-the-art for this area by re-examining the design of transformer architectures for video representation learning.

Representation Learning

Teaching Matters: Investigating the Role of Supervision in Vision Transformers

1 code implementation CVPR 2023 Matthew Walmer, Saksham Suri, Kamal Gupta, Abhinav Shrivastava

We compare ViTs trained through different methods of supervision, and show that they learn a diverse range of behaviors in terms of their attention, representations, and downstream performance.

Dual-Key Multimodal Backdoors for Visual Question Answering

1 code implementation CVPR 2022 Matthew Walmer, Karan Sikka, Indranil Sur, Abhinav Shrivastava, Susmit Jha

This is challenging for the attacker as the detector can distort or ignore the visual trigger entirely, which leads to models where backdoors are over-reliant on the language trigger.

Question Answering Visual Question Answering

APRICOT: A Dataset of Physical Adversarial Attacks on Object Detection

1 code implementation ECCV 2020 A. Braunegg, Amartya Chakraborty, Michael Krumdick, Nicole Lape, Sara Leary, Keith Manville, Elizabeth Merkhofer, Laura Strickhart, Matthew Walmer

Physical adversarial attacks threaten to fool object detection systems, but reproducible research on the real-world effectiveness of physical patches and how to defend against them requires a publicly available benchmark dataset.

Adversarial Robustness Density Estimation +2

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