Search Results for author: Despoina Paschalidou

Found 16 papers, 7 papers with code

CAD: Photorealistic 3D Generation via Adversarial Distillation

no code implementations11 Dec 2023 Ziyu Wan, Despoina Paschalidou, IAn Huang, Hongyu Liu, Bokui Shen, Xiaoyu Xiang, Jing Liao, Leonidas Guibas

The increased demand for 3D data in AR/VR, robotics and gaming applications, gave rise to powerful generative pipelines capable of synthesizing high-quality 3D objects.

3D Generation

CC3D: Layout-Conditioned Generation of Compositional 3D Scenes

no code implementations ICCV 2023 Sherwin Bahmani, Jeong Joon Park, Despoina Paschalidou, Xingguang Yan, Gordon Wetzstein, Leonidas Guibas, Andrea Tagliasacchi

In this work, we introduce CC3D, a conditional generative model that synthesizes complex 3D scenes conditioned on 2D semantic scene layouts, trained using single-view images.

Inductive Bias

CurveCloudNet: Processing Point Clouds with 1D Structure

no code implementations21 Mar 2023 Colton Stearns, Davis Rempe, Jiateng Liu, Alex Fu, Sebastien Mascha, Jeong Joon Park, Despoina Paschalidou, Leonidas J. Guibas

Modern depth sensors such as LiDAR operate by sweeping laser-beams across the scene, resulting in a point cloud with notable 1D curve-like structures.

PartNeRF: Generating Part-Aware Editable 3D Shapes without 3D Supervision

no code implementations16 Mar 2023 Konstantinos Tertikas, Despoina Paschalidou, Boxiao Pan, Jeong Joon Park, Mikaela Angelina Uy, Ioannis Emiris, Yannis Avrithis, Leonidas Guibas

Evaluations on various ShapeNet categories demonstrate the ability of our model to generate editable 3D objects of improved fidelity, compared to previous part-based generative approaches that require 3D supervision or models relying on NeRFs.

Generating Part-Aware Editable 3D Shapes Without 3D Supervision

1 code implementation CVPR 2023 Konstantinos Tertikas, Despoina Paschalidou, Boxiao Pan, Jeong Joon Park, Mikaela Angelina Uy, Ioannis Emiris, Yannis Avrithis, Leonidas Guibas

Evaluations on various ShapeNet categories demonstrate the ability of our model to generate editable 3D objects of improved fidelity, compared to previous part-based generative approaches that require 3D supervision or models relying on NeRFs.

COPILOT: Human-Environment Collision Prediction and Localization from Egocentric Videos

no code implementations ICCV 2023 Boxiao Pan, Bokui Shen, Davis Rempe, Despoina Paschalidou, Kaichun Mo, Yanchao Yang, Leonidas J. Guibas

In this work, we introduce the challenging problem of predicting collisions in diverse environments from multi-view egocentric videos captured from body-mounted cameras.

Collision Avoidance Synthetic Data Generation

3D-Aware Video Generation

1 code implementation29 Jun 2022 Sherwin Bahmani, Jeong Joon Park, Despoina Paschalidou, Hao Tang, Gordon Wetzstein, Leonidas Guibas, Luc van Gool, Radu Timofte

Generative models have emerged as an essential building block for many image synthesis and editing tasks.

Image Generation Video Generation

ATISS: Autoregressive Transformers for Indoor Scene Synthesis

1 code implementation NeurIPS 2021 Despoina Paschalidou, Amlan Kar, Maria Shugrina, Karsten Kreis, Andreas Geiger, Sanja Fidler

The ability to synthesize realistic and diverse indoor furniture layouts automatically or based on partial input, unlocks many applications, from better interactive 3D tools to data synthesis for training and simulation.

2D Semantic Segmentation task 1 (8 classes) 3D Semantic Scene Completion +1

Neural Parts: Learning Expressive 3D Shape Abstractions with Invertible Neural Networks

1 code implementation CVPR 2021 Despoina Paschalidou, Angelos Katharopoulos, Andreas Geiger, Sanja Fidler

The INN allows us to compute the inverse mapping of the homeomorphism, which in turn, enables the efficient computation of both the implicit surface function of a primitive and its mesh, without any additional post-processing.

Learning Unsupervised Hierarchical Part Decomposition of 3D Objects from a Single RGB Image

1 code implementation CVPR 2020 Despoina Paschalidou, Luc van Gool, Andreas Geiger

Humans perceive the 3D world as a set of distinct objects that are characterized by various low-level (geometry, reflectance) and high-level (connectivity, adjacency, symmetry) properties.

3D Reconstruction

Superquadrics Revisited: Learning 3D Shape Parsing beyond Cuboids

1 code implementation CVPR 2019 Despoina Paschalidou, Ali Osman Ulusoy, Andreas Geiger

Abstracting complex 3D shapes with parsimonious part-based representations has been a long standing goal in computer vision.

RayNet: Learning Volumetric 3D Reconstruction with Ray Potentials

1 code implementation CVPR 2018 Despoina Paschalidou, Ali Osman Ulusoy, Carolin Schmitt, Luc van Gool, Andreas Geiger

RayNet integrates a CNN that learns view-invariant feature representations with an MRF that explicitly encodes the physics of perspective projection and occlusion.

3D Reconstruction

Learning Local Feature Aggregation Functions with Backpropagation

no code implementations26 Jun 2017 Angelos Katharopoulos, Despoina Paschalidou, Christos Diou, Anastasios Delopoulos

This paper introduces a family of local feature aggregation functions and a novel method to estimate their parameters, such that they generate optimal representations for classification (or any task that can be expressed as a cost function minimization problem).

General Classification

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