Next: Parameters Up: Image processing commands Prev: IHMSTOD
IEXCLUDE
Excludes specified pixels from display and processing by setting
the IGNORE quality bit for those pixels. There are five modes:
- PIXel
- Exclude individual pixels pointed to by the
cursor - space-bar or left button selects
for exclusion, RETURN or centre button
terminates
- SOUrce
- Excludes pixels up to a specified radius from
sources specified by RA/DEC, which can be given
as a text file, an ASTERIX source list or separate
RA and DEC arrays
- CIRcle
- Excludes pixels inside a specified circle
- POLygon
- Excludes pixels within a polygon whose vertices
are specified with the cursor - space-bar or
left button selects position of vertex, RETURN
or centre button indicates last vertex and
terminates - the first and last vertices are
automatically joined
- REGion
- Excludes pixels in a region previously defined
by IREGION or by a specified ARDfile
The keyword OUTSIDE causes the function of CIRCLE and POLYGON modes
to be inverted ie. pixels outside are excluded.
The masked QUALITY array can be viewed with IQPIXEL.
The effect of IEXCLUDE can be toggled on and off by the use of
IMASK, (set the most significant bit to 0 to switch off).
Subtopics:
Next: Parameters Up: Image processing commands Prev: IHMSTOD