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pfsclamp(1)		     General Commands Manual		     pfsclamp(1)

NAME
     pfsclamp - Clamp color and luminance channel values to be within the speci-
     fied range

SYNOPSIS
     pfsclamp	[--min	<minimum>]  [--max  <maximum>]	[--percentile]	[--zero]
     [--rgb]

DESCRIPTION
     Use this command to clamp values of luminance  and  color	channels  to  be
     within  the  specified  range.  I.e. if a value in the channel is above the
     specified maximum or below specified minimum, set the value to either mini-
     mum or maximum.

     The command operates directly on XYZ channels.

OPTIONS
     --min <val>

	    Lower bound for clamping. Default value: 0.0001 (10^-4)

     --max <val>

	    Upper bound for clamping. Default value: 100000000 (10^8)

     --percentile, -p

	    Treat given min and max values as a percentile.

     --zero, -z

	    Set values out of clamping range to  zero,	instead  of  setting  to
	    specified maximum and minimum.

     --rgb

	    Perform clamping in RGB space.

EXAMPLES
     pfsin memorial.hdr | pfsclamp | pfsout memorial_cl.hdr

	    Remove possible out-of-range values, for examples zeros, from memor-
	    ial image.

     pfsin memorial.hdr | pfsclamp --max 0.95 -p | pfsout memorial_cl.hdr

	    Remove 5% of the brightest pixels from the original image.

SEE ALSO
     pfsin(1) pfsout(1)

BUGS
     Please  report  bugs  and comments to Rafal Mantiuk <mantiuk@mpi-sb.mpg.de>
     and Grzegorz Krawczyk <krawczyk@mpi-sb.mpg.de>.

								     pfsclamp(1)

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