Search Results for author: Ondrej Biza

Found 15 papers, 10 papers with code

Equivariant Single View Pose Prediction Via Induced and Restricted Representations

no code implementations7 Jul 2023 Owen Howell, David Klee, Ondrej Biza, Linfeng Zhao, Robin Walters

We show that an algorithm that learns a three-dimensional representation of the world from two dimensional images must satisfy certain geometric consistency properties which we formulate as SO(2)-equivariance constraints.

Pose Estimation Pose Prediction

On Robot Grasp Learning Using Equivariant Models

1 code implementation10 Jun 2023 Xupeng Zhu, Dian Wang, Guanang Su, Ondrej Biza, Robin Walters, Robert Platt

Real-world grasp detection is challenging due to the stochasticity in grasp dynamics and the noise in hardware.

Inductive Bias

Image to Sphere: Learning Equivariant Features for Efficient Pose Prediction

1 code implementation27 Feb 2023 David M. Klee, Ondrej Biza, Robert Platt, Robin Walters

Predicting the pose of objects from a single image is an important but difficult computer vision problem.

Pose Prediction

Invariant Slot Attention: Object Discovery with Slot-Centric Reference Frames

1 code implementation9 Feb 2023 Ondrej Biza, Sjoerd van Steenkiste, Mehdi S. M. Sajjadi, Gamaleldin F. Elsayed, Aravindh Mahendran, Thomas Kipf

Automatically discovering composable abstractions from raw perceptual data is a long-standing challenge in machine learning.

Object Object Discovery

Image to Icosahedral Projection for $\mathrm{SO}(3)$ Object Reasoning from Single-View Images

no code implementations18 Jul 2022 David Klee, Ondrej Biza, Robert Platt, Robin Walters

In this paper, we propose a novel architecture based on icosahedral group convolutions that reasons in $\mathrm{SO(3)}$ by learning a projection of the input image onto an icosahedron.

Object Pose Estimation

Binding Actions to Objects in World Models

1 code implementation27 Apr 2022 Ondrej Biza, Robert Platt, Jan-Willem van de Meent, Lawson L. S. Wong, Thomas Kipf

We study the problem of binding actions to objects in object-factored world models using action-attention mechanisms.

Hard Attention Object

Learning Symmetric Embeddings for Equivariant World Models

1 code implementation24 Apr 2022 Jung Yeon Park, Ondrej Biza, Linfeng Zhao, Jan Willem van de Meent, Robin Walters

Incorporating symmetries can lead to highly data-efficient and generalizable models by defining equivalence classes of data samples related by transformations.

Factored World Models for Zero-Shot Generalization in Robotic Manipulation

1 code implementation10 Feb 2022 Ondrej Biza, Thomas Kipf, David Klee, Robert Platt, Jan-Willem van de Meent, Lawson L. S. Wong

In this paper, we learn to generalize over robotic pick-and-place tasks using object-factored world models, which combat the combinatorial explosion by ensuring that predictions are equivariant to permutations of objects.

Object Zero-shot Generalization

Equivariant Grasp learning In Real Time

no code implementations29 Sep 2021 Xupeng Zhu, Dian Wang, Ondrej Biza, Robert Platt

Visual grasp detection is a key problem in robotics where the agent must learn to model the grasp function, a mapping from an image of a scene onto a set of feasible grasp poses.

Learning Symmetric Representations for Equivariant World Models

no code implementations29 Sep 2021 Jung Yeon Park, Ondrej Biza, Linfeng Zhao, Jan-Willem van de Meent, Robin Walters

In this paper, we use equivariant transition models as an inductive bias to learn symmetric latent representations in a self-supervised manner.

Inductive Bias

The Impact of Negative Sampling on Contrastive Structured World Models

1 code implementation24 Jul 2021 Ondrej Biza, Elise van der Pol, Thomas Kipf

World models trained by contrastive learning are a compelling alternative to autoencoder-based world models, which learn by reconstructing pixel states.

Contrastive Learning

Action Priors for Large Action Spaces in Robotics

1 code implementation11 Jan 2021 Ondrej Biza, Dian Wang, Robert Platt, Jan-Willem van de Meent, Lawson L. S. Wong

This paper proposes an alternative approach where the solutions of previously solved tasks are used to produce an action prior that can facilitate exploration in future tasks.

reinforcement-learning Reinforcement Learning (RL) +2

Online Abstraction with MDP Homomorphisms for Deep Learning

1 code implementation30 Nov 2018 Ondrej Biza, Robert Platt

Abstraction of Markov Decision Processes is a useful tool for solving complex problems, as it can ignore unimportant aspects of an environment, simplifying the process of learning an optimal policy.

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