L-Sweeps: A scalable, parallel preconditioner for the high-frequency Helmholtz equation.
Matthias TausLeonardo Zepeda-NúñezRussell J. HewettLaurent DemanetPublished in: J. Comput. Phys. (2020)
Keyphrases
- high frequency
- low frequency
- visual quality
- discrete wavelet transform
- high resolution
- wavelet transform
- wavelet coefficients
- high frequencies
- subband
- low pass
- low and high frequency
- phase shifting
- low bit rate coding
- multi resolution analysis
- high frequency components
- wavelet decomposition
- wavelet domain
- filter bank
- dct coefficients
- color images
- frequency domain
- image quality
- frequency band
- image data
- multiresolution
- feature extraction
- image processing
- machine learning