fill_holes_nest

For a input binary mask in NESTED ordering, fill_holes_nest flip to 1 all pixels located in invalid regions with fewer pixels than the threshold provided.
Two pixels are adjacent (and belong to the same region or hole) if they have at least one point in common.

Location in HEALPix directory tree: src/f90/mod/mask_tools.F90 

FORMAT

call fill_holes_nest( nside, new_min_size, mask_in, mask_out )

ARGUMENTS

name & dimensionality	kind	in/out	description
nside	I4B	IN	The $N_{\mathrm{side}}$ value of the input mask.
new_min_size	I4B	IN	Minimal size of hole (in pixels) on output
mask_in(0:Npix-1)	I4B	IN	Input NESTED-ordered mask. Npix = 12*nside*nside
mask_out(0:Npix-1)	I4B	OUT	Output NESTED-ordered mask. Can be the same array as mask_in.

EXAMPLE:

use healpix_types
use healpix_modules
...
call fill_holes_nest(nside, new_min_size, mask_in, mask_in)

???

MODULES & ROUTINES

This section lists the modules and routines used by fill_holes_nest.

mask_tools

mask processing module (see related routines below)

RELATED ROUTINES

This section lists the routines related to fill_holes_nest

dist2holes_nest

angular distance to closest invalid pixel of the given mask

fill_holes_nest

turn to valid all pixels located in 'holes' containing fewer pixels than the given threshold

maskborder_nest

identify inner boundary pixels of 'holes' for given mask

size_holes_nest

returns size (in pixels) of holes found in input mask