Switching median filter. More...

Public Member Functions
	CSRSWMFilter (real_type alpha)

DG_DEVICE void	operator() (unsigned i, const int row_offsets, const int column_indices, const real_type values, const real_type x, real_type *y)

Detailed Description

template<class real_type>
struct dg::CSRSWMFilter< real_type >

Switching median filter.

\[ y_i = \begin{cases} \text{Median}( x) \text{ if } |x_i - \text{Median}(x)| > \alpha \sigma\\ x_i \text{ else} \end{cases} \]

with

\[ \sigma = \text{Median}(|x-\text{Median}(x)|) \]

the median absolute deviation and \( \alpha\) a constant. The Median is taken over all points contained in the stencil given by the row and column indices. The matrix values are ignored.

Note: Adaptive Switching Median Filter from Akkoul "A New Adaptive Switching Median Filter" IEEE Signal processing letters (2010)

See also: dg::blas2::stencil dg::create::window_stencil

Constructor & Destructor Documentation

◆ CSRSWMFilter()

template<class real_type >

dg::CSRSWMFilter< real_type >::CSRSWMFilter ( real_type alpha )

inline

Member Function Documentation

◆ operator()()