NAME

       Convolve - convolve an image with a given kernel

SYNOPSIS

       astconvolve [OPTION...] ASTRdata

DESCRIPTION

       Convolve  is  part of GNU Astronomy Utilities 0.22.  Convolve will convolve an input image
       with a given spatial kernel (image) in the spatial domain (no edge effects)  or  frequency
       domain. The latter suffers from edge effects, but can be much faster.

       For  more  information, please run any of the following commands. In particular the second
       contains a very comprehensive explanation of  Convolve's  invocation:  expected  input(s),
       output(s), and a full description of all the options.

       All options and their values:
              $ astconvolve -P

       Inputs/Outputs and options:
              $ info astconvolve

       Full section in manual/book:
              $ info Convolve

       Full Gnuastro manual/book:
              $ info gnuastro

       If  you  couldn't find your answer in the manual, you can get direct help from experienced
       Gnuastro users and developers. For more information, please run:

              $ info help-gnuastro

       Convolve options:

              Input:

       -c, --column=STR
              Column name or number if input is a table.

       -h, --hdu=STR/INT
              Extension name or number of input data.

       -H, --minsharpspec=FLT
              Deconvolution: min spectrum of sharp img.

       --kernelcolumn=STR
              Column name or number if kernel is a table.

       -k, --kernel=FITS
              File name of kernel for convolution.

       --nokernelflip
              Do not flip the kernel image.

       --nokernelnorm
              Do not normalize the kernel image.

       --searchin=STR
              Select column(s): 'name', 'unit', 'comment'.

       --stdintimeout=INT
              Micro-seconds to wait for standard input.

       -u, --khdu=STR
              HDU containing the kernel.

              Tessellation (tile grid):

       --checktiles
              Tile IDs in an image, the size of input.

       -F, --remainderfrac=FLT
              Fraction of remainder to split last tile.

       --interpmetric=STR
              Interpolation metric (radial, manhattan).

       -M, --numchannels=INT[,..] No. of channels in dim.s (FITS order).

       --oneelempertile
              Display 1 element/tile, not full input res.

       --workoverch
              Work (not tile) over channel edges.

       -Z, --tilesize=INT[,INT]
              Regular tile size on dim.s (FITS order).

              Output:

       --conv-on-blank
              Do convolution on blank pixels also.

       -C, --checkfreqsteps
              View the steps in the frequency domain.

       -D, --dontdelete
              Don't delete output if it exists.

       -K, --keepinputdir
              Keep input directory for automatic output.

       --noedgecorrection
              Do not correct the edges in the spatial domain

       --outfitsnocommit
              No Git commit in 0-th HDU of output FITS.

       --outfitsnoconfig
              No metadata in 0-th HDU of output FITS.

       --outfitsnodate
              No 'DATE' in 0-th HDU of output FITS.

       --outfitsnoversions
              No versions in 0-th HDU of output FITS.

       -o, --output=STR
              Output file name.

       --tableformat=STR
              Table fmt: 'fits-ascii', 'fits-binary', 'txt'.

       -T, --type=STR
              Type of output: e.g., int16, float32, etc...

       --wcslinearmatrix=STR
              WCS linear matrix of output ('pc' or 'cd').

              Operating modes:

       -?, --help
              give this help list

       --checkconfig
              List all config files and variables read.

       --cite BibTeX citation for this program.

       --config=STR
              Read configuration file STR immediately.

       --config-prefix=STR
              Custom prefix of option names config files.

       -d, --domain=STR
              Convolution domain: 'spatial', 'frequency'.

       --lastconfig
              Do not parse any more configuration files.

       --minmapsize=INT
              Min. bytes to avoid RAM automatically.

       -m, --makekernel=INT
              Make 2*INT kernel to create input image.

       -N, --numthreads=INT
              Number of CPU threads to use.

       --onlyversion=STR
              Only run if the program version is STR.

       -P, --printparams
              Print parameter values to be used and abort.

       --quietmmap
              Don't print mmap'd file's name and size.

       -q, --quiet
              Only report errors, remain quiet about steps.

       -S, --setdirconf
              Set default values for this directory and abort.

       --usage
              give a short usage message

       -U, --setusrconf
              Set default values for this user and abort.

       -V, --version
              print program version

       Mandatory or optional arguments to long options are also mandatory  or  optional  for  any
       corresponding short options.

       GNU Astronomy Utilities home page: http://www.gnu.org/software/gnuastro/

REPORTING BUGS

       Report bugs to bug-gnuastro@gnu.org.

COPYRIGHT

       Copyright  ©  2015-2024 Free Software Foundation, Inc.  License GPLv3+: GNU General public
       license version 3 or later.
       This is free software: you are free to change and redistribute it.  There is NO  WARRANTY,
       to the extent permitted by law.

       Written/developed by Mohammad Akhlaghi

SEE ALSO

       The  full  documentation  for Convolve is maintained as a Texinfo manual.  If the info and
       Convolve programs are properly installed at your site, the command

              info Convolve

       should give you access to the complete manual.