A parallel multigrid-based preconditioner for the 3D heterogeneous high-frequency Helmholtz equation.
C. D. RiyantiA. KononovYogi A. ErlanggaCornelis VuikCornelis W. OosterleeRené-Edouard PlessixWim A. MulderPublished in: J. Comput. Phys. (2007)
Keyphrases
- high frequency
- low frequency
- high resolution
- wavelet transform
- visual quality
- high frequencies
- multiresolution
- subband
- wavelet coefficients
- discrete wavelet transform
- frequency band
- numerical methods
- low pass
- frequency domain
- high frequency components
- wavelet decomposition
- multi resolution analysis
- phase shifting
- blocking artifacts
- image analysis
- partial differential equations
- multiscale
- boundary conditions
- computationally expensive
- flow field