NAME

darkx -- Create a dark count Faint Object Camera (FOC) image.

USAGE

darkx input output option

DESCRIPTION

This task takes either the mean or the median of a list of input images, after dividing each image by its exposure time. The input images are assumed to be in units of counts.

Intermediate files are created in directory tmp$.

PARAMETERS

input [file name]

The input text file containing the file names of the images that are to be averaged---one file name per line.

output [file name]

Name of the output file that will contain the dark count image created by darkx.

option = median [string, allowed values: median | average]

The type of filtering to be applied, pixel by pixel, to the collection of input images.

(title = dark count) [string]

Title for the output image.

(low_reject = 0.) [real]

This parameter is ignored unless the option parameter is set to "average". If low_reject is less than 1, then it represents the fraction of low pixels that are to be rejected from the average. If low_reject is greater than or equal to 1, then it represents the number of low pixels that are to be rejected from the average.

(high_reject = 0.) [real]

This parameter is ignored unless the option parameter is set to "average". If high_reject is less than 1, then it represents the fraction of high pixels that ar to be rejected from the average. If high_reject is greater than or equal to 1, then it represents the number of high pixels that are to be rejected from the average.

(verbose = no) [boolean]

Print details of the operations?

(inimglist = ) [string]

This is a task-defined variable containing the list of images to be processed.

EXAMPLES

1. Create a dark count image from the list specified in the file list.images.

  fo> darkx list.images outimage median

BUGS

REFERENCES

This task was written by David Giaretta.

SEE ALSO

Type "help focphot option=sys" for a higher-level description of the focphot package.