astconvolve1

Usage

Overview

Convolve is part of GNU Astronomy Utilities 0.23. 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.

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/