man/ficombine

Synopsis

ficombine [options] <input images> [-o|--output <output>]

Description

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.

General options:

-h, --help

Gives general summary about the command line options.

--long-help

Gives a detailed list of command line options.

--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).

--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.

Generic combination specification:

-m, --mode <mode>

Use the specified mode to combine images.

-n, --ignore-negative

Ignore (i.e. mask) pixels with negative values.

--logical-or

Use logical ``or combination between masks.

--logical-and

Use logical ``and combination between masks.

Combination modes (a comma-separated list of these should follow -m|--mode):

average, 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.

rejavg

Mean value after rejecting outliers.

iterations=<n>

Number of iterations to reject outliers.

lower=<l>, upper=, sigma=<s>

Outlier limit (lower, upper, both) in stddev.

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.