1 code implementation • 30 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.
no code implementations • 30 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.
no code implementations • 1 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.
no code implementations • 3 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.
no code implementations • 12 Jan 2023 • Wolfgang Schnurrer, Markus Jonscher, Jürgen Seiler, Thomas Richter, Michel Bätz, André Kaup
To enlarge the test set for evaluation we further propose a method to generate arbitrarily shaped lost areas.
no code implementations • 11 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.
no code implementations • 8 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.
no code implementations • 20 Jul 2022 • Jürgen Seiler, Thomas Richter, André Kaup
For this, the prediction is carried out in two steps.
no code implementations • 7 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.
no code implementations • 7 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.
no code implementations • 7 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.
no code implementations • 6 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
no code implementations • 30 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.