SDI
Keywords: map

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`SDI`

In the `CLEAN` variant proposed by (), extended features (instead of point sources) around the current maximum of the residual map are selected and removed in a single step. The simplest implementation redefines the notion of minor and major cycles of the `CLARK` algorithm. In the minor cycles, only the selection of the clean components is done by including all the pixels in the residual map that rise above a contour set at some fraction of the current peak level. In major cycles, all those components are removed together in the Fourier plane. The `SDI` algorithm may be instable is the fraction used for the selection of clean components is badly chosen.