ficombine - combining (most frequently, averaging) a set of
images
ficombine [options] <input images>
[-o|--output <output>]
The purpose of this program is to combine the input images (with
the same sizes) to a single image. This combination refers to a kind of
"averaging" for the images, however, other modes are also
available.
- -h, --help
- Gives general summary about the command line options.
- --long-help,
--help-long
- Gives a detailed list of command line options.
- --wiki-help,
--help-wiki, --mediawiki-help,
--help-mediawiki
- Gives a detailed list of command line options in Mediawiki format.
- --version,
--version-short, --short-version
- Gives some version information about the program.
- -o, --output
<fits>
- The name of the output file (omitting or specifing '-' yields the output
to be written to stdout).
- --history,
--no-history
- Incude or exclude the command line of the invoking `ficombine` call. By
default, the command line is added into the FITS headers (FI_HSTRY) but if
there are enormous amount of input files, one can use --no-history
to omit the respective lengthy keywords.
- --data
<spec>
- Output pixel data format specification.
- -b, --bitpix
<bitpix>
- Standard FITS output bitpix value.
- -M, --input-mask
<fits>
- Input mask file to co-add to output image.
- mean
- The mean value of the pixels.
- median
- The median value of the pixels.
- min, minimum
- The minimum value of the pixels.
- max, maximum
- The maximum value of the pixels.
- rejmed,
rejection
- Median value after rejecting outliers.
- rejmean
- Mean value after rejecting outliers.
- iterations=<n>
- Number of iterations to reject outliers.
- lower=<l>,
upper=<u>, sigma=<s>
- Outlier limit (lower, upper, both) in standard deviation. Note that
setting sigma to some value is equivalent to setting 'lower' and 'upper'
to the same value simultaneously.
- truncated
- Truncated mean.
- winsorized
- Winsorized mean.
- lowest=<cnt>,
highest=<cnt>, discard=<cnt>
- Reject the 'lowest' and 'highest' count of points when computing truncated
or winsorized mean. Setting 'discard' to some value is equivalent to
setting 'lowest' and 'highest' to this value simultaneously.
- sum
- Sum of the pixel values.
- squaresum
- Sum for the squarers of the pixel values.
- scatter,
stddev
- Pixel scatter (standard deviation).
- or
- Use logical "or" combination between masks.
- and
- Use logical "and" combination between masks.
- ignorenegative
- Ignore (i.e. mask) pixels with negative values.
- ignorezero
- Ignore (i.e. mask) pixels with a zero value.
- ignorenegative
- Ignore (i.e. mask) pixels with positive values.
Report bugs to <apal@szofi.net>, see also
https://fitsh.net/.
Copyright © 1996, 2002, 2004-2008, 2010-2016, 2018-2020;
Pal, Andras <apal@szofi.net>