Concept
Ringing artifacts
Related publications (43)
Using a head-mounted camera to infer attention direction
A head-mounted camera was used to measure head direction. The camera was mounted to the forehead of 20 6- and 20 12-month-old infants while they watched an object held at 11 horizontal (-80 degrees to + 80 degrees) and 9 vertical (-48 degrees to + 50 degre ...
Sage Publications Ltd2013A Dual-Tree Rational-Dilation Complex Wavelet Transform
In this correspondence, we introduce a dual-tree rational-dilation complex wavelet transform for oscillatory signal processing. Like the short-time Fourier transform and the dyadic dual-tree complex wavelet transform, the introduced transform employs quadr ...
2011Towards oscillation-free implementation of the immersed boundary method with spectral-like methods
Jiannong Fang, Marc Parlange, Chad Higgins, Marc Diebold
It is known that, when the immersed boundary method (IBM) is implemented within spectral-like methods, the Gibbs oscillation seriously deteriorates the calculation of derivatives near the body surface. In this paper, a radial basis function (RBF) based smo ...
Elsevier2011Addressing a systematic vibration artifact in diffusion-weighted MRI
We have identified and studied a pronounced artifact in diffusion-weighted MRI on a clinical system. The artifact results from vibrations of the patient table due to low-frequency mechanical resonances of the system which are stimulated by the low-frequenc ...
Wiley-Blackwell2010The Clapping Book: Wind-Driven Oscillations in a Stack of Elastic Sheets
Pedro Miguel Nunes Pereira de Almeida Reis
We present a hybrid experimental and theoretical study on the oscillatory behavior exhibited by multiple thin sheets under aerodynamic loading. Our clapping book consists of a stack of paper, clamped at the downstream end and placed in a wind tunnel with s ...
American Physical Society2010Low-dose aberration corrected cryo-electron microscopy of organic specimens
Spherical aberration (C-s) correction in the transmission electron microscope has enabled sub-angstrom resolution imaging of inorganic materials. To achieve similar resolution for radiation-sensitive organic materials requires the microscope to be operated ...
Elsevier BV2008Real-time scattering compensation for time-of-flight camera
3D images from time-of-flight cameras may suffer from false depth readings caused by light scattering. In order to reduce such scattering artifacts, a scattering compensation procedure is proposed. First, scattering is analysed and expressed as a linear tr ...
2007Tone mapping for high dynamic range images
Tone mapping is an essential step for the reproduction of "nice looking" images. It provides the mapping between the luminances of the original scene to the output device's display values. When the dynamic range of the captured scene is smaller or larger t ...
EPFL2006Solving the Couette inverse problem using a wavelet-vaguelette decomposition
This paper develops a new approach to computing the shear rate from the torque and rotationalvelocity measurements in a Couette rheometer. It is based on wavelet-vaguelette decomposition (WVD) proposed by Donoho (Donoho, D., Appl. Comput. Harmon. Anal. 2, ...
2005