Search Results for author: Wolfgang Schnurrer

Found 10 papers, 0 papers with code

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.

On the influence of clipping in lossless predictive and wavelet coding of noisy images

no code implementations11 Jan 2023 Wolfgang Schnurrer, Jürgen Seiler, Michael Schöberl, André Kaup

Especially in lossless image coding the obtainable compression ratio strongly depends on the amount of noise included in the data as all noise has to be coded, too.

Improving block-based compensated wavelet lifting by reconstructing unconnected pixels

no code implementations8 Dec 2022 Wolfgang Schnurrer, Jürgen Seiler, André Kaup

This paper presents a new approach for improving the visual quality of the lowpass band of a compensated wavelet transform.

Motion Compensation

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.

Optimized processing order for 3D hole filling in video sequences using frequency selective extrapolation

no code implementations20 Jul 2022 Jürgen Seiler, Susanne Schöll, Wolfgang Schnurrer, André Kaup

A problem often arising in video communication is the reconstruction of missing or distorted areas in a video sequence.

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.

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