Search Results for author: Hans-Peter Seidel

Found 48 papers, 11 papers with code

Large-Batch, Neural Multi-Objective Bayesian Optimization

1 code implementation1 Jun 2023 Navid Ansari, Hans-Peter Seidel, Vahid Babaei

Bayesian optimization provides a powerful framework for global optimization of black-box, expensive-to-evaluate functions.

Bayesian Optimization Efficient Exploration

Enhancing image quality prediction with self-supervised visual masking

no code implementations31 May 2023 Uğur Çoğalan, Mojtaba Bemana, Hans-Peter Seidel, Karol Myszkowski

Full-reference image quality metrics (FR-IQMs) aim to measure the visual differences between a pair of reference and distorted images, with the goal of accurately predicting human judgments.


Neural Field Convolutions by Repeated Differentiation

no code implementations4 Apr 2023 Ntumba Elie Nsampi, Adarsh Djeacoumar, Hans-Peter Seidel, Tobias Ritschel, Thomas Leimkühler

Neural fields are evolving towards a general-purpose continuous representation for visual computing.

Revisiting Image Deblurring with an Efficient ConvNet

1 code implementation4 Feb 2023 Lingyan Ruan, Mojtaba Bemana, Hans-Peter Seidel, Karol Myszkowski, Bin Chen

In this work, we propose a unified lightweight CNN network that features a large effective receptive field (ERF) and demonstrates comparable or even better performance than Transformers while bearing less computational costs.

Deblurring Image Deblurring +1

GlowGAN: Unsupervised Learning of HDR Images from LDR Images in the Wild

no code implementations22 Nov 2022 Chao Wang, Ana Serrano, Xingang Pan, Bin Chen, Hans-Peter Seidel, Christian Theobalt, Karol Myszkowski, Thomas Leimkuehler

Most in-the-wild images are stored in Low Dynamic Range (LDR) form, serving as a partial observation of the High Dynamic Range (HDR) visual world.

inverse tone mapping Inverse-Tone-Mapping +1

Video frame interpolation for high dynamic range sequences captured with dual-exposure sensors

no code implementations19 Jun 2022 Uğur Çoğalan, Mojtaba Bemana, Hans-Peter Seidel, Karol Myszkowski

Video frame interpolation (VFI) enables many important applications that might involve the temporal domain, such as slow motion playback, or the spatial domain, such as stop motion sequences.

Video Frame Interpolation

Physics Informed Neural Fields for Smoke Reconstruction with Sparse Data

no code implementations14 Jun 2022 Mengyu Chu, Lingjie Liu, Quan Zheng, Erik Franz, Hans-Peter Seidel, Christian Theobalt, Rhaleb Zayer

With a hybrid architecture that separates static and dynamic contents, fluid interactions with static obstacles are reconstructed for the first time without additional geometry input or human labeling.

Eikonal Fields for Refractive Novel-View Synthesis

no code implementations2 Feb 2022 Mojtaba Bemana, Karol Myszkowski, Jeppe Revall Frisvad, Hans-Peter Seidel, Tobias Ritschel

We tackle the problem of generating novel-view images from collections of 2D images showing refractive and reflective objects.

Novel View Synthesis

Neural Relightable Participating Media Rendering

no code implementations NeurIPS 2021 Quan Zheng, Gurprit Singh, Hans-Peter Seidel

We propose to learn neural representations for participating media with a complete simulation of global illumination.

Novel View Synthesis

Learning a self-supervised tone mapping operator via feature contrast masking loss

no code implementations19 Oct 2021 Chao Wang, Bin Chen, Hans-Peter Seidel, Karol Myszkowski, Ana Serrano

High Dynamic Range (HDR) content is becoming ubiquitous due to the rapid development of capture technologies.

Tone Mapping

Mixed Integer Neural Inverse Design

1 code implementation27 Sep 2021 Navid Ansari, Hans-Peter Seidel, Vahid Babaei

Our mixed-integer inverse design uncovers globally optimal or near optimal solutions in a principled manner.

Self-supervised Outdoor Scene Relighting

no code implementations ECCV 2020 Ye Yu, Abhimitra Meka, Mohamed Elgharib, Hans-Peter Seidel, Christian Theobalt, William A. P. Smith

Outdoor scene relighting is a challenging problem that requires good understanding of the scene geometry, illumination and albedo.

Differentiable Event Stream Simulator for Non-Rigid 3D Tracking

no code implementations30 Apr 2021 Jalees Nehvi, Vladislav Golyanik, Franziska Mueller, Hans-Peter Seidel, Mohamed Elgharib, Christian Theobalt

This paper introduces the first differentiable simulator of event streams, i. e., streams of asynchronous brightness change signals recorded by event cameras.

Learning Speech-driven 3D Conversational Gestures from Video

no code implementations13 Feb 2021 Ikhsanul Habibie, Weipeng Xu, Dushyant Mehta, Lingjie Liu, Hans-Peter Seidel, Gerard Pons-Moll, Mohamed Elgharib, Christian Theobalt

We propose the first approach to automatically and jointly synthesize both the synchronous 3D conversational body and hand gestures, as well as 3D face and head animations, of a virtual character from speech input.

Hand Pose Estimation

High-Fidelity Neural Human Motion Transfer from Monocular Video

1 code implementation CVPR 2021 Moritz Kappel, Vladislav Golyanik, Mohamed Elgharib, Jann-Ole Henningson, Hans-Peter Seidel, Susana Castillo, Christian Theobalt, Marcus Magnor

We address these limitations for the first time in the literature and present a new framework which performs high-fidelity and temporally-consistent human motion transfer with natural pose-dependent non-rigid deformations, for several types of loose garments.

Image Generation Vocal Bursts Intensity Prediction

EventHands: Real-Time Neural 3D Hand Pose Estimation from an Event Stream

1 code implementation ICCV 2021 Viktor Rudnev, Vladislav Golyanik, Jiayi Wang, Hans-Peter Seidel, Franziska Mueller, Mohamed Elgharib, Christian Theobalt

Due to the different data modality of event cameras compared to classical cameras, existing methods cannot be directly applied to and re-trained for event streams.

3D Hand Pose Estimation

i3DMM: Deep Implicit 3D Morphable Model of Human Heads

1 code implementation CVPR 2021 Tarun Yenamandra, Ayush Tewari, Florian Bernard, Hans-Peter Seidel, Mohamed Elgharib, Daniel Cremers, Christian Theobalt

Our approach has the following favorable properties: (i) It is the first full head morphable model that includes hair.

Learning Complete 3D Morphable Face Models from Images and Videos

no code implementations CVPR 2021 Mallikarjun B R, Ayush Tewari, Hans-Peter Seidel, Mohamed Elgharib, Christian Theobalt

Our network design and loss functions ensure a disentangled parameterization of not only identity and albedo, but also, for the first time, an expression basis.

3D Face Reconstruction Monocular Reconstruction +1

X-Fields: Implicit Neural View-, Light- and Time-Image Interpolation

no code implementations1 Oct 2020 Mojtaba Bemana, Karol Myszkowski, Hans-Peter Seidel, Tobias Ritschel

We suggest to represent an X-Field -a set of 2D images taken across different view, time or illumination conditions, i. e., video, light field, reflectance fields or combinations thereof-by learning a neural network (NN) to map their view, time or light coordinates to 2D images.

PIE: Portrait Image Embedding for Semantic Control

no code implementations20 Sep 2020 Ayush Tewari, Mohamed Elgharib, Mallikarjun B R., Florian Bernard, Hans-Peter Seidel, Patrick Pérez, Michael Zollhöfer, Christian Theobalt

We present the first approach for embedding real portrait images in the latent space of StyleGAN, which allows for intuitive editing of the head pose, facial expression, and scene illumination in the image.

Face Model

Monocular Reconstruction of Neural Face Reflectance Fields

no code implementations CVPR 2021 Mallikarjun B R., Ayush Tewari, Tae-Hyun Oh, Tim Weyrich, Bernd Bickel, Hans-Peter Seidel, Hanspeter Pfister, Wojciech Matusik, Mohamed Elgharib, Christian Theobalt

The reflectance field of a face describes the reflectance properties responsible for complex lighting effects including diffuse, specular, inter-reflection and self shadowing.

Monocular Reconstruction

StyleRig: Rigging StyleGAN for 3D Control over Portrait Images

no code implementations CVPR 2020 Ayush Tewari, Mohamed Elgharib, Gaurav Bharaj, Florian Bernard, Hans-Peter Seidel, Patrick Pérez, Michael Zollhöfer, Christian Theobalt

StyleGAN generates photorealistic portrait images of faces with eyes, teeth, hair and context (neck, shoulders, background), but lacks a rig-like control over semantic face parameters that are interpretable in 3D, such as face pose, expressions, and scene illumination.

Neural View-Interpolation for Sparse Light Field Video

no code implementations30 Oct 2019 Mojtaba Bemana, Karol Myszkowski, Hans-Peter Seidel, Tobias Ritschel

We suggest representing light field (LF) videos as "one-off" neural networks (NN), i. e., a learned mapping from view-plus-time coordinates to high-resolution color values, trained on sparse views.

Neural Style-Preserving Visual Dubbing

no code implementations5 Sep 2019 Hyeongwoo Kim, Mohamed Elgharib, Michael Zollhöfer, Hans-Peter Seidel, Thabo Beeler, Christian Richardt, Christian Theobalt

We present a style-preserving visual dubbing approach from single video inputs, which maintains the signature style of target actors when modifying facial expressions, including mouth motions, to match foreign languages.

XNect: Real-time Multi-Person 3D Motion Capture with a Single RGB Camera

4 code implementations1 Jul 2019 Dushyant Mehta, Oleksandr Sotnychenko, Franziska Mueller, Weipeng Xu, Mohamed Elgharib, Pascal Fua, Hans-Peter Seidel, Helge Rhodin, Gerard Pons-Moll, Christian Theobalt

The first stage is a convolutional neural network (CNN) that estimates 2D and 3D pose features along with identity assignments for all visible joints of all individuals. We contribute a new architecture for this CNN, called SelecSLS Net, that uses novel selective long and short range skip connections to improve the information flow allowing for a drastically faster network without compromising accuracy.

3D Multi-Person Human Pose Estimation 3D Multi-Person Pose Estimation +1

EgoFace: Egocentric Face Performance Capture and Videorealistic Reenactment

no code implementations26 May 2019 Mohamed Elgharib, Mallikarjun BR, Ayush Tewari, Hyeongwoo Kim, Wentao Liu, Hans-Peter Seidel, Christian Theobalt

Our lightweight setup allows operations in uncontrolled environments, and lends itself to telepresence applications such as video-conferencing from dynamic environments.

FML: Face Model Learning from Videos

no code implementations CVPR 2019 Ayush Tewari, Florian Bernard, Pablo Garrido, Gaurav Bharaj, Mohamed Elgharib, Hans-Peter Seidel, Patrick Pérez, Michael Zollhöfer, Christian Theobalt

In contrast, we propose multi-frame video-based self-supervised training of a deep network that (i) learns a face identity model both in shape and appearance while (ii) jointly learning to reconstruct 3D faces.

3D Reconstruction Face Model

Mo2Cap2: Real-time Mobile 3D Motion Capture with a Cap-mounted Fisheye Camera

no code implementations15 Mar 2018 Weipeng Xu, Avishek Chatterjee, Michael Zollhoefer, Helge Rhodin, Pascal Fua, Hans-Peter Seidel, Christian Theobalt

We tackle these challenges based on a novel lightweight setup that converts a standard baseball cap to a device for high-quality pose estimation based on a single cap-mounted fisheye camera.

3D Pose Estimation

LIME: Live Intrinsic Material Estimation

no code implementations CVPR 2018 Abhimitra Meka, Maxim Maximov, Michael Zollhoefer, Avishek Chatterjee, Hans-Peter Seidel, Christian Richardt, Christian Theobalt

We present the first end to end approach for real time material estimation for general object shapes with uniform material that only requires a single color image as input.

Foreground Segmentation Image-to-Image Translation +3

MonoPerfCap: Human Performance Capture from Monocular Video

no code implementations7 Aug 2017 Weipeng Xu, Avishek Chatterjee, Michael Zollhöfer, Helge Rhodin, Dushyant Mehta, Hans-Peter Seidel, Christian Theobalt

Reconstruction from monocular video alone is drastically more challenging, since strong occlusions and the inherent depth ambiguity lead to a highly ill-posed reconstruction problem.

Monocular Reconstruction Pose Estimation +1

VNect: Real-time 3D Human Pose Estimation with a Single RGB Camera

1 code implementation3 May 2017 Dushyant Mehta, Srinath Sridhar, Oleksandr Sotnychenko, Helge Rhodin, Mohammad Shafiei, Hans-Peter Seidel, Weipeng Xu, Dan Casas, Christian Theobalt

A real-time kinematic skeleton fitting method uses the CNN output to yield temporally stable 3D global pose reconstructions on the basis of a coherent kinematic skeleton.

3D Human Pose Estimation

Towards a quality metric for dense light fields

1 code implementation CVPR 2017 Vamsi Kiran Adhikarla, Marek Vinkler, Denis Sumin, Rafał K. Mantiuk, Karol Myszkowski, Hans-Peter Seidel, Piotr Didyk

We find that the existing image quality metrics provide good measures of light-field quality, but require dense reference light- fields for optimal performance.

EgoCap: Egocentric Marker-less Motion Capture with Two Fisheye Cameras (Extended Abstract)

no code implementations31 Dec 2016 Helge Rhodin, Christian Richardt, Dan Casas, Eldar Insafutdinov, Mohammad Shafiei, Hans-Peter Seidel, Bernt Schiele, Christian Theobalt

Marker-based and marker-less optical skeletal motion-capture methods use an outside-in arrangement of cameras placed around a scene, with viewpoints converging on the center.

Pose Estimation

Model-based Outdoor Performance Capture

no code implementations21 Oct 2016 Nadia Robertini, Dan Casas, Helge Rhodin, Hans-Peter Seidel, Christian Theobalt

We propose a new model-based method to accurately reconstruct human performances captured outdoors in a multi-camera setup.

Edge Detection

EgoCap: Egocentric Marker-less Motion Capture with Two Fisheye Cameras

no code implementations23 Sep 2016 Helge Rhodin, Christian Richardt, Dan Casas, Eldar Insafutdinov, Mohammad Shafiei, Hans-Peter Seidel, Bernt Schiele, Christian Theobalt

We therefore propose a new method for real-time, marker-less and egocentric motion capture which estimates the full-body skeleton pose from a lightweight stereo pair of fisheye cameras that are attached to a helmet or virtual reality headset.

Pose Estimation Vocal Bursts Valence Prediction

Deep Shading: Convolutional Neural Networks for Screen-Space Shading

no code implementations19 Mar 2016 Oliver Nalbach, Elena Arabadzhiyska, Dushyant Mehta, Hans-Peter Seidel, Tobias Ritschel

In computer vision, convolutional neural networks (CNNs) have recently achieved new levels of performance for several inverse problems where RGB pixel appearance is mapped to attributes such as positions, normals or reflectance.

Image Generation

Real-Time Hand Tracking Using a Sum of Anisotropic Gaussians Model

no code implementations11 Feb 2016 Srinath Sridhar, Helge Rhodin, Hans-Peter Seidel, Antti Oulasvirta, Christian Theobalt

In this paper, we propose a new approach that tracks the full skeleton motion of the hand from multiple RGB cameras in real-time.

A Versatile Scene Model with Differentiable Visibility Applied to Generative Pose Estimation

no code implementations ICCV 2015 Helge Rhodin, Nadia Robertini, Christian Richardt, Hans-Peter Seidel, Christian Theobalt

Generative reconstruction methods compute the 3D configuration (such as pose and/or geometry) of a shape by optimizing the overlap of the projected 3D shape model with images.

Occlusion Handling Pose Estimation

Discovering the Structure of a Planar Mirror System from Multiple Observations of a Single Point

no code implementations CVPR 2013 Ilya Reshetouski, Alkhazur Manakov, Ayush Bandhari, Ramesh Raskar, Hans-Peter Seidel, Ivo Ihrke

We investigate the problem of identifying the position of a viewer inside a room of planar mirrors with unknown geometry in conjunction with the room's shape parameters.

Video Quality Assessment for Computer Graphics Applications

no code implementations ACM Transactions on Graphics 2010 Tunc Ozan Aydin, Martin Cadik, Karol Myszkowski, Hans-Peter Seidel

We present a full-reference video quality metric geared specifically towards the requirements of Computer Graphics applications as a faster computational alternative to subjective evaluation.

Tone Mapping Video Compression +1

Dynamic Range Independent Image Quality Assessment

no code implementations SIGGRAPH 2008 Tunç O. Aydın, Rafal Mantiuk, Karol Myszkowski, Hans-Peter Seidel

Current quality assessment metrics are not suitable for this task, as they assume that both reference and test images have the same dynamic range.

Image Quality Assessment inverse tone mapping +2

Cannot find the paper you are looking for? You can Submit a new open access paper.