Search Results for author: Christoffer Heckman

Found 11 papers, 2 papers with code

Aligning Images and Text with Semantic Role Labels for Fine-Grained Cross-Modal Understanding

no code implementations LREC 2022 Abhidip Bhattacharyya, Cecilia Mauceri, Martha Palmer, Christoffer Heckman

As vision processing and natural language processing continue to advance, there is increasing interest in multimodal applications, such as image retrieval, caption generation, and human-robot interaction.

Caption Generation Image Retrieval +2

A Population-Level Analysis of Neural Dynamics in Robust Legged Robots

no code implementations27 Jun 2023 Eugene R. Rush, Christoffer Heckman, Kaushik Jayaram, J. Sean Humbert

Recurrent neural network-based reinforcement learning systems are capable of complex motor control tasks such as locomotion and manipulation, however, much of their underlying mechanisms still remain difficult to interpret.

BO-ICP: Initialization of Iterative Closest Point Based on Bayesian Optimization

1 code implementation25 Apr 2023 Harel Biggie, Andrew Beathard, Christoffer Heckman

Typical algorithms for point cloud registration such as Iterative Closest Point (ICP) require a favorable initial transform estimate between two point clouds in order to perform a successful registration.

Bayesian Optimization Point Cloud Registration

Time Dependence in Kalman Filter Tuning

1 code implementation21 Aug 2021 Zhaozhong Chen, Christoffer Heckman, Simon Julier, Nisar Ahmed

First, in theory, many of these measures do not guarantee a unique solution due to observability issues.

Bayesian Optimization Prediction Intervals

Unsupervised Metric Relocalization Using Transform Consistency Loss

no code implementations1 Nov 2020 Mike Kasper, Fernando Nobre, Christoffer Heckman, Nima Keivan

Training networks to perform metric relocalization traditionally requires accurate image correspondences.

Cooperative Control of Mobile Robots with Stackelberg Learning

no code implementations3 Aug 2020 Joewie J. Koh, Guohui Ding, Christoffer Heckman, Lijun Chen, Alessandro Roncone

Multi-robot cooperation requires agents to make decisions that are consistent with the shared goal without disregarding action-specific preferences that might arise from asymmetry in capabilities and individual objectives.

Q-Learning reinforcement-learning +1

Leveraging Non-Specialists for Accurate and Time Efficient AMR Annotation

no code implementations LREC 2020 Mary Martin, Cecilia Mauceri, Martha Palmer, Christoffer Heckman

Abstract Meaning Representations (AMRs), a syntax-free representation of phrase semantics are useful for capturing the meaning of a phrase and reflecting the relationship between concepts that are referred to.

Referring Expression Referring Expression Comprehension

Weak in the NEES?: Auto-tuning Kalman Filters with Bayesian Optimization

no code implementations23 Jul 2018 Zhaozhong Chen, Christoffer Heckman, Simon Julier, Nisar Ahmed

Kalman filters are routinely used for many data fusion applications including navigation, tracking, and simultaneous localization and mapping problems.

Bayesian Optimization Simultaneous Localization and Mapping +1

Hidden Markov Random Field Iterative Closest Point

no code implementations7 Nov 2017 John Stechschulte, Christoffer Heckman

When registering point clouds resolved from an underlying 2-D pixel structure, such as those resulting from structured light and flash LiDAR sensors, or stereo reconstruction, it is expected that some points in one cloud do not have corresponding points in the other cloud, and that these would occur together, such as along an edge of the depth map.

Light Source Estimation with Analytical Path-tracing

no code implementations15 Jan 2017 Mike Kasper, Nima Keivan, Gabe Sibley, Christoffer Heckman

We present a novel algorithm for light source estimation in scenes reconstructed with a RGB-D camera based on an analytically-derived formulation of path-tracing.

Lighting Estimation Outdoor Light Source Estimation

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