NAME¶

mFlattenExec - Remove the background from an image

SYNOPSIS¶

mFlattenExec [-p imgdir] [-d] [-n(o-areas)] [-s statusfile] images.tbl flatdir

DESCRIPTION¶

Runs both mFitPlane and mBackground on a set of images.

OPTIONS¶

-p imgdir

Specifies path to directory containing images to be flattened.

-d

Turns on debugging.

-n

No-area-images flag, indicating that mFlattenExec should not require area images for all the input FITS images.

-s statusfile

Output and errors are sent to statusfile instead of to stdout

ARGUMENTS¶

images.tbl

Metadata table (generated by mImgtbl) describing images to be flattened.

flatdir

Path to directory where output files should be created.

RESULT¶

Creates "flattened" versions of each input FITS image.

MESSAGES¶

OK

[struct stat="OK", count=nimages, failed=nfailed, warning=nwarnings]

ERROR

Cannot open status file: statusfile

ERROR

Cannot access flatdir

ERROR

flatdir is not a directory

ERROR

Invalid image metadata file: filename

ERROR

Need column 'file' in image metadata file filename

ERROR

mDiff or mBackground error

EXAMPLES¶

$ mFlattenExec output/images.tbl output/flattened

[struct stat="OK", count=5, failed=0, warning=0]

BUGS¶

The drizzle algorithm has been implemented but has not been tested in this release.

If a header template contains carriage returns (i.e., created/modified on a Windows machine), the cfitsio library will be unable to read it properly, resulting in the error: [struct stat="ERROR", status=207, msg="illegal character in keyword"]

It is best for the background correction algorithms if the area described in the header template completely encloses all of the input images in their entirety. If parts of input images are "chopped off" by the header template, the background correction will be affected. We recommend you use an expanded header for the reprojection and background modeling steps, returning to the originally desired header size for the final coaddition. The default background matching assumes that there are no non-linear background variations in the individual images (and therefore in the overlap differences). If there is any uncertainty in this regard, it is safer to turn on the "level only" background matching (the "-l" flag in mBgModel.

COPYRIGHT¶

2001-2015 California Institute of Technology, Pasadena, California

If your research uses Montage, please include the following acknowledgement: "This research made use of Montage. It is funded by the National Science Foundation under Grant Number ACI-1440620, and was previously funded by the National Aeronautics and Space Administration's Earth Science Technology Office, Computation Technologies Project, under Cooperative Agreement Number NCC5-626 between NASA and the California Institute of Technology."

The Montage distribution includes an adaptation of the MOPEX algorithm developed at the Spitzer Science Center.