Search Results for author: Thomas Richter

Found 13 papers, 1 papers with code

SLIC: A Learned Image Codec Using Structure and Color

1 code implementation30 Jan 2024 Srivatsa Prativadibhayankaram, Mahadev Prasad Panda, Thomas Richter, Heiko Sparenberg, Siegfried Fößel, André Kaup

We propose the structure and color based learned image codec (SLIC) in which the task of compression is split into that of luminance and chrominance.

MS-SSIM SSIM

Color Learning for Image Compression

no code implementations30 Jun 2023 Srivatsa Prativadibhayankaram, Thomas Richter, Heiko Sparenberg, Siegfried Fößel

To enable a method that is suitable for image compression and subsequently extended to video compression, we propose a novel deep learning model architecture, where the task of image compression is divided into two sub-tasks, learning structural information from luminance channel and color from chrominance channels.

Image Compression Video Compression

Temporal Scalability of Dynamic Volume Data Using Mesh Compensated Wavelet Lifting

no code implementations1 Mar 2023 Wolfgang Schnurrer, Niklas Pallast, Thomas Richter, André Kaup

We propose an approach based on compensated wavelet lifting for obtaining a scalable representation of dynamic CT and MR volumes with very high quality.

Computed Tomography (CT) Motion Compensation

Analysis of mesh-based motion compensation in wavelet lifting of dynamical 3-D+t CT data

no code implementations3 Feb 2023 Wolfgang Schnurrer, Thomas Richter, Jürgen Seiler, André Kaup

Factorized in the lifting structure, the wavelet transform can easily be extended by arbitrary compensation methods.

Motion Compensation

Efficient lossless coding of highpass bands from block-based motion compensated wavelet lifting using JPEG 2000

no code implementations11 Jan 2023 Wolfgang Schnurrer, Tobias Tröger, Thomas Richter, Jürgen Seiler, André Kaup

Lossless image coding is a crucial task especially in the medical area, e. g., for volumes from Computed Tomography or Magnetic Resonance Tomography.

3-D mesh compensated wavelet lifting for 3-D+t medical CT data

no code implementations8 Dec 2022 Wolfgang Schnurrer, Thomas Richter, Jürgen Seiler, Christian Herglotz, André Kaup

We show that a 3-D mesh can obtain a higher quality of the lowpass band by 0. 28 dB with less than 40% of the model parameters of a comparable 2-D mesh.

Reconstruction of images taken by a pair of non-regular sampling sensors using correlation based matching

no code implementations7 Apr 2022 Markus Jonscher, Jürgen Seiler, Thomas Richter, Michel Bätz, André Kaup

Recently, it has been shown that by covering a low resolution sensor with a non-regular sampling mask and by using an efficient algorithm for image reconstruction, a high resolution image can be obtained.

Image Reconstruction

Reducing Randomness of Non-Regular Sampling Masks for Image Reconstruction

no code implementations7 Apr 2022 Markus Jonscher, Jürgen Seiler, Thomas Richter, André Kaup

Recently, it has been shown that it is possible to obtain a high resolution image by covering a low resolution sensor with a non-regular sampling mask.

Image Reconstruction

Reconstruction of Videos Taken by a Non-Regular Sampling Sensor

no code implementations7 Apr 2022 Markus Jonscher, Jürgen Seiler, Michel Bätz, Thomas Richter, Wolfgang Schnurrer, André Kaup

Recently, it has been shown that a high resolution image can be obtained without the usage of a high resolution sensor.

An unfitted Eulerian finite element method for the time-dependent Stokes problem on moving domains

no code implementations6 Feb 2020 Henry von Wahl, Thomas Richter, Christoph Lehrenfeld

We analyse a Eulerian Finite Element method, combining a Eulerian time-stepping scheme applied to the time-dependent Stokes equations using the CutFEM approach with inf-sup stable Taylor-Hood elements for the spatial discretisation.

Numerical Analysis Numerical Analysis

High Dynamic Range Imaging Technology

no code implementations30 Nov 2017 Alessandro Artusi, Thomas Richter, Touradj Ebrahimi, Rafal K. Mantiuk

In this lecture note, we describe high dynamic range (HDR) imaging systems; such systems are able to represent luminances of much larger brightness and, typically, also a larger range of colors than conventional standard dynamic range (SDR) imaging systems.

Vocal Bursts Intensity Prediction

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