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Sagnik Majumder

12 accepted papers

2026

Mash, Spread, Slice! Learning to Manipulate Object States Via Visual Spatial Progress

ICRA 2026poster

Most robot manipulation focuses on changing the kinematic state of objects: picking, placing, opening, or rotating them. However, a wide range of real-world manipulation tasks involve a different class of object state change—such as mashing, spreading, or slicing—where the object’s physical and visu…

2025

Switch-a-View: View Selection Learned from Unlabeled In-the-wild Videos

ICCV 2025poster

We introduce Switch-a-View, a model that learns to automatically select the viewpoint to display at each timepoint when creating a how-to video. The key insight of our approach is how to train such a model from unlabeled--but human-edited--video samples. We pose a pretext task that pseudo-labels seg…

Cited by 0SourcePDFScholar
2025

Which Viewpoint Shows it Best? Language for Weakly Supervising View Selection in Multi-view Instructional Videos

CVPR 2025highlight

Given a multi-view video, which viewpoint is most informative for a human observer? Existing methods rely on heuristics or expensive "best-view" supervision to answer this question, limiting their applicability. We propose a weakly supervised approach that leverages language accompanying an instruct…

Cited by 0SourcePDFScholar
2024

ActiveRIR: Active Audio-Visual Exploration for Acoustic Environment Modeling

IROS 2024

An environment acoustic model represents how sound is transformed by the physical characteristics of an indoor environment, for any given source/receiver location. Traditional methods for constructing acoustic models involve expensive and time-consuming collection of large quantities of acoustic dat

Cited by 2SourceScholar
2024

Ego-Exo4D: Understanding Skilled Human Activity from First- and Third-Person Perspectives

CVPR 2024poster

We present Ego-Exo4D a diverse large-scale multimodal multiview video dataset and benchmark challenge. Ego-Exo4D centers around simultaneously-captured egocentric and exocentric video of skilled human activities (e.g. sports music dance bike repair). 740 participants from 13 cities worldwide perform…

2024

Learning Spatial Features from Audio-Visual Correspondence in Egocentric Videos

CVPR 2024poster

We propose a self-supervised method for learning representations based on spatial audio-visual correspondences in egocentric videos. Our method uses a masked auto-encoding framework to synthesize masked binaural audio through the synergy of audio and vision thereby learning useful spatial relationsh…

Cited by 6SourcePDFScholar
2023

Chat2Map: Efficient Scene Mapping From Multi-Ego Conversations

CVPR 2023poster

Can conversational videos captured from multiple egocentric viewpoints reveal the map of a scene in a cost-efficient way? We seek to answer this question by proposing a new problem: efficiently building the map of a previously unseen 3D environment by exploiting shared information in the egocentric…

Cited by 9SourcePDFScholar
2022

Few-Shot Audio-Visual Learning of Environment Acoustics

NeurIPS 2022accept

Room impulse response (RIR) functions capture how the surrounding physical environment transforms the sounds heard by a listener, with implications for various applications in AR, VR, and robotics. Whereas traditional methods to estimate RIRs assume dense geometry and/or sound measurements throughou…

Cited by 55SourcePDFScholar
2021

Learning to Set Waypoints for Audio-Visual Navigation

ICLR 2021poster

In audio-visual navigation, an agent intelligently travels through a complex, unmapped 3D environment using both sights and sounds to find a sound source (e.g., a phone ringing in another room). Existing models learn to act at a fixed granularity of agent motion and rely on simple recurrent aggregat…

2019

Meta-Learning Convolutional Neural Architectures for Multi-Target Concrete Defect Classification With the COncrete DEfect BRidge IMage Dataset

CVPR 2019poster

Recognition of defects in concrete infrastructure, especially in bridges, is a costly and time consuming crucial first step in the assessment of the structural integrity. Large variation in appearance of the concrete material, changing illumination and weather conditions, a variety of possible surfa…

Cited by 186PDFcodeScholar