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mDiff - Online in the Cloud

Run mDiff in OnWorks free hosting provider over Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

This is the command mDiff that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

PROGRAM:

NAME


mDiff - Calculates the difference between a pair of overlapping images

SYNOPSIS


mDiff [-d level] [-n(o-areas)] [-s statusfile] in1.fits in2.fits out.fits template.hdr

DESCRIPTION


mDiff calculates a simple difference between a single pair of overlapping images. This is
meant for use on reprojected images where the pixels already line up exactly. mDiff
analyzes an image metadata table to determine a list of overlapping images. Each image is
compared with every other image to determine all overlapping image pairs. A pair of
images are deemed to overlap if any pixel around the perimeter of one image falls within
the boundary of the other image.

OPTIONS


-d level
Turns on debugging to the specified level (1-4).

-n No-area-images flag. Creates difference image without requiring pixel area FITS
image

-s statusfile
Output and errors are sent to statusfile instead of to stdout

ARGUMENTS


in1.fits
First input FITS file. (Also needs area image in1_area.fits, or use -n flag)

in2.fits
Second input FITS file.(Also needs area image in2_area.fits, or use -n flag)

out.fits
Difference FITS image to be generated.

template.hdr
FITS header template used to generate output image.

RESULT


FITS image and area image representing the difference in the overlap region.

MESSAGES


OK [struct stat="OK"]

ERROR Cannot open status file: statusfile

ERROR Images don't overlap

ERROR All pixels are blank

ERROR Template file not found

ERROR FITS library error

ERROR general error

EXAMPLES


$ mDiff proj/in1.fits proj/in2.fits output/diff.fits template.hdr
[struct stat="OK"]

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