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Full Discussion: Issue in substitution
Top Forums Shell Programming and Scripting Issue in substitution Post 302413595 by jsmoriss on Friday 16th of April 2010 10:19:49 AM
Old 04-16-2010
I don't think sed supports the {##} suffix, but perl does. Here's an (untested) adaptation of the above:

Code:
perl -n -e 's/^(.{180})([^-]*)-(.*)$/$1-$2$3/' input.txt

js.
Last edited by Scott; 04-16-2010 at 11:43 AM.. Reason: Code tags
 

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LEARN ABOUT DEBIAN

exrpptm

exrpptm(1)						      General Commands Manual							exrpptm(1)

NAME

       exrpptm - performs tone mapping on an OpenEXR image (photoreceptor)

SYNOPSIS

       exrpptm [options] input.exr output.exr

DESCRIPTION

       Performs the tone mapping function described in this paper:

       Erik  Reinhard and Kate Devlin.	Dynamic Range Reduction Inspired by Photoreceptor Physiology.  IEEE Transactions on Visualization and Com-
       puter Graphics (2004).

       The input image should be normalized, and the output file returned by this function should also be normalized before viewing.

OPTIONS

       -f     Controls the intensity of the resulting image.  Valid range is from -8 to 8, defaulting to 0.

       -m     Controls the contrast of the resulting image.  Valid range is from 0.3 to 1.0.  The default value of 0 uses an algorithm	to  calcu-
	      late an appropriate m factor for the image based on its luminance.

       -c     Amount  of  chromatic  adaptation  to  apply to the image.  Valid range is from 0 meaning no chromatic adaptation to 1 meaning fully
	      adapted.	Defaults to 0.

       -a     Controls the light adaptation.  Valid range is from 0 meaning that the adaptation is global to 1	meaning  that  the  adaptation	is
	      based on pixel intensity.  Defaults to 1, to trade detail visibility for contrast.

AUTHORS

       Billy Biggs <vektor@dumbterm.net>.

SEE ALSO

       exrtools(1).

exrtools 0.4							   December 2003							exrpptm(1)
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