Imake_subband

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Name

Imake_subband - define subband of existing BIFF band

Syntax

 #include <xite/biff.h>

 IBAND Imake_subband( IBAND band, long xstart,
    long ystart, long xsize, long ysize );

Description

Creates a subband of band; a data structure with pointers into the old band. The new band will have horizontal size xsize and vertical size ysize, and indexing [1][1] in the subband is equivalent to indexing [ystart][xstart] in the old band. The same pixels are referenced, data is not copied!

Restrictions

band must be created, the whole subband must be within the old.

See also

Init_band(5), Imake_band(5), Iset_start(5), Ixstart(5), Iystart(5), Iset_mag(5), Ixmag(5), Iymag(5), subcopy(1)

Return value

pointer to the new band if ok, NULL otherwise.

Author

Tor Lønnestad, BLAB, Ifi, UiO