SYNOPSIS

DESCRIPTION

Options are:

-f, --force

force overwrite of output file

-h, --help

display this help and exit

-v, --verbose

verbose operation

-V, --version

output version information and exit

-p, --png

output a PNG format file

-j, --jpg

output a JPEG format file

-x, --x=,N/

X center coordinate

-y, --y=,N/

Y center coordinate

--x0=,N/

X corner coordinate

--y0=,N/

Y corner coordinate

-r, --rows=,N/

number of rows (height)

-c, --columns=,N/

number of columns (width)

--all

extract a cutout of the same size as the input image

--linear-scale

output in linear scale [default]

-l, --log-scale

output in log scale

-s, --sqrt-scale

output in square root scale

-e, --histeq-scale

histogram equalized output

--asinh-scale

asinh equalized output

-i, --invert

invert output colors

--palette=,name/

output palette name (png output only)

--factor=,value/

multiply image by value

--rate

scale image by exposure time factor

--autoscale=,percent/

percent of histogram to include

If percent is a single value it is interpreted as

the percentage of the histogram to include. If percent is two values separated by a comma it is interpreted as the lower and upper bounds of the histogram to include (eg. --autoscale=,1/.5,98.5)

--autoscale-min=,percent/

lower bound percentage of histogram to include

--autoscale-max=,percent/

upper bound percentage of histogram to include

--min=,value/

image value to use for scale minimum

--max=,value/

image value to use for scale maximum

The value for --min or --max may be either one value to

be used for all images (eg. --min=,0/), or one value for each image separated by a comma (eg. --min=,0/,0,0)

--red=,file/

filename to be used in red channel of color image

--green=,file/

filename to be used in green channel of color image

--blue=,file/

filename to be used in blue channel of color image

--zoom=,factor/

zoom input image by positive multiplicative factor

--align

use WCS information in header to align images

--compass

add a WCS compass to the image

Supported palettes:

gray heat cool rainbow red green blue