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Keshigeyan Chandrasegaran

12 accepted papers

2026

Theory of Space: Can Foundation Models Construct Spatial Beliefs through Active Exploration?

ICLR 2026poster

Spatial embodied intelligence often operates under partial observability, where agents must act to acquire missing information rather than passively consume complete observations. In such settings, progress depends on actively selecting informative actions that reduce uncertainty and support the con…

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2026

Understanding VLMs Spatial Mental Modeling Capability from Limited Views

ICLR 2026poster

Can Vision Language Models (VLMs) imagine the full scene from just a few views, like humans do? Humans form spatial mental models, internal representations of unseen space, to reason about layout, perspective, and motion. Our new MindCube benchmark with 21,154 questions across 3,268 images exposes t…

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2025

Exploring Diffusion Transformer Designs via Grafting

NeurIPS 2025oral

Designing model architectures requires decisions such as selecting operators (e.g., attention, convolution) and configurations (e.g., depth, width). However, evaluating the impact of these decisions on model quality requires costly pretraining, limiting architectural investigation. Inspired by how n…

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2025

Re-thinking Temporal Search for Long-Form Video Understanding

CVPR 2025poster

Efficient understanding of long-form videos remains a significant challenge in computer vision. In this work, we revisit temporal search paradigms for long-form video understanding, studying a fundamental issue pertaining to all state-of-the-art (SOTA) long-context vision-language models (VLMs). In…

2024

HourVideo: 1-Hour Video-Language Understanding

NeurIPS 2024poster

We present **HourVideo**, a benchmark dataset for hour-long video-language understanding. Our dataset consists of a novel task suite comprising summarization, perception (*recall*, *tracking*), visual reasoning (*spatial*, *temporal*, *predictive*, *causal*, *counterfactual*), and navigation (*room-…

2024

Model Inversion Robustness: Can Transfer Learning Help?

CVPR 2024poster

Model Inversion (MI) attacks aim to reconstruct private training data by abusing access to machine learning models. Contemporary MI attacks have achieved impressive attack performance posing serious threats to privacy. Meanwhile all existing MI defense methods rely on regularization that is in direc…

2023

Label-Only Model Inversion Attacks via Knowledge Transfer

NeurIPS 2023poster

In a model inversion (MI) attack, an adversary abuses access to a machine learning (ML) model to infer and reconstruct private training data. Remarkable progress has been made in the white-box and black-box setups, where the adversary has access to the complete model or the model's soft output respe…

2023

Re-Thinking Model Inversion Attacks Against Deep Neural Networks

CVPR 2023poster

Model inversion (MI) attacks aim to infer and reconstruct private training data by abusing access to a model. MI attacks have raised concerns about the leaking of sensitive information (e.g. private face images used in training a face recognition system). Recently, several algorithms for MI have bee…

2022

Discovering Transferable Forensic Features for CNN-Generated Images Detection

ECCV 2022poster

"Visual counterfeits are increasingly causing an existential conundrum in mainstream media with rapid evolution in neural image synthesis methods. Though detection of such counterfeits has been a taxing problem in the image forensics community, a recent class of forensic detectors -- universal detec…

2022

Few-shot Image Generation via Adaptation-Aware Kernel Modulation

NeurIPS 2022accept

Few-shot image generation (FSIG) aims to learn to generate new and diverse samples given an extremely limited number of samples from a domain, e.g., 10 training samples. Recent work has addressed the problem using transfer learning approach, leveraging a GAN pretrained on a large-scale source domain…

2022

Revisiting Label Smoothing and Knowledge Distillation Compatibility: What was Missing?

ICML 2022spotlight

This work investigates the compatibility between label smoothing (LS) and knowledge distillation (KD). Contemporary findings addressing this thesis statement take dichotomous standpoints: Muller et al. (2019) and Shen et al. (2021b). Critically, there is no effort to understand and resolve these con…

2021

A Closer Look at Fourier Spectrum Discrepancies for CNN-Generated Images Detection

CVPR 2021poster

CNN-based generative modelling has evolved to produce synthetic images indistinguishable from real images in the RGB pixel space. Recent works have observed that CNN-generated images share a systematic shortcoming in replicating high frequency Fourier spectrum decay attributes. Furthermore, these wo…

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