加速的基于图的谱多项式滤波器
Accelerated graph-based spectral polynomial filters
摘要:
基于图的谱去噪是使用噪声信号的图拉普拉斯矩阵的特征分解的低通滤波。多项式滤波通过投影到合适的Krylov子空间上避免了本征分解的昂贵计算。多项式滤波器可以基于,例如,在双向和引导滤波器上。我们建议通过运行灵活的基于Krylov子空间的线性和特征值求解器,如块局部最优预处理共轭梯度(LOBPCG)方法,构建加速多项式滤波器。
英文摘要:
Graph-based spectral denoising is a low-pass filtering using the eigendecomposition of the graph Laplacian matrix of a noisy signal. Polynomial filtering avoids costly computation of the eigendecomposition by projections onto suitable Krylov subspaces. Polynomial filters can be based, e.g., on the bilateral and guided filters. We propose constructing accelerated polynomial filters by running flexible Krylov subspace based linear and eigenvalue solvers such as the Block Locally Optimal Preconditioned Conjugate Gradient (LOBPCG) method.
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