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Matthew Johnson

9 accepted papers

2025

Fan-Out Revisited: The Impact of the Human Element on Scalability of Human Multi-Robot Teams

ICRA 2025

This paper introduces a novel fan-out model that improves accuracy over previous models. The commonly used models rely on neglect time, the time an agent operates independently, which confounds both human and robot abilities. The proposed model separates neglect time into two functionally distinct c

Cited by 1SourceScholar
2022

3D Face Reconstruction with Dense Landmarks

ECCV 2022poster

"Landmarks often play a key role in face analysis, but many aspects of identity or expression cannot be represented by sparse landmarks alone. Thus, in order to reconstruct faces more accurately, landmarks are often combined with additional signals like depth images or techniques like differentiable…

2021

FastNeRF: High-Fidelity Neural Rendering at 200FPS

ICCV 2021poster

Recent work on Neural Radiance Fields (NeRF) showed how neural networks can be used to encode complex 3D environments that can be rendered photorealistically from novel viewpoints. Rendering these images is very computationally demanding and recent improvements are still a long way from enabling int…

Cited by 787PDFScholar
2020

CONFIG: Controllable Neural Face Image Generation

ECCV 2020poster

Our ability to sample realistic natural images, particularly faces, has advanced by leaps and bounds in recent years, yet our ability to exert fine-tuned control over the generative process has lagged behind. If this new technology is to find practical uses, we need to achieve a level of control ove…

2020

High Resolution Zero-Shot Domain Adaptation of Synthetically Rendered Face Images

ECCV 2020poster

Generating photorealistic images of human faces at scale remains a prohibitively difficult task using computer graphics approaches. This is because these require the simulation of light to be photorealistic, which in turn requires physically accurate modelling of geometry, materials, and light sourc…

Cited by 11SourcePDFScholar
2019

SOLAR: Deep Structured Representations for Model-Based Reinforcement Learning

ICML 2019oral

Model-based reinforcement learning (RL) has proven to be a data efficient approach for learning control tasks but is difficult to utilize in domains with complex observations such as images. In this paper, we present a method for learning representations that are suitable for iterative model-based p…

2018

Multimodal Prediction and Personalization of Photo Edits with Deep Generative Models

AISTATS 2018poster

Professional-grade software applications are powerful but complicated – expert users can achieve impressive results, but novices often struggle to complete even basic tasks. Photo editing is a prime example: after loading a photo, the user is confronted with an array of cryptic sliders like "clarity…

Cited by 0SourcePDFScholar
2017

Bayesian Learning and Inference in Recurrent Switching Linear Dynamical Systems

AISTATS 2017poster

Many natural systems, such as neurons firing in the brain or basketball teams traversing a court, give rise to time series data with complex, nonlinear dynamics. We can gain insight into these systems by decomposing the data into segments that are each explained by simpler dynamic units. Building o…

Cited by 301SourcePDFScholar
2016

The Segmented iHMM: A Simple, Efficient Hierarchical Infinite HMM

ICML 2016poster

We propose the segmented iHMM (siHMM), a hierarchical infinite hidden Markov model (iHMM) that supports a simple, efficient inference scheme. The siHMM is well suited to segmentation problems, where the goal is to identify points at which a time series transitions from one relatively stable regime t…

Cited by 19SourcePDFScholar