.TH "pfsclamp" 1
.SH NAME
pfsclamp \- Clamp color and luminance channel values to be within the specified range
.SH SYNOPSIS
.B pfsclamp
[--min <minimum>] [--max <maximum>]
[--percentile] [--zero] [--rgb]
.SH 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
minimum or maximum.

The command operates directly on XYZ channels.
.SH OPTIONS
.TP
--min <val>

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

.TP
--max <val>

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

.TP
--percentile, -p

Treat given min and max values as a percentile.

.TP
--zero, -z

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

.TP
--rgb

Perform clamping in RGB space.

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

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

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

Remove 5% of the brightest pixels from the original image.
.SH "SEE ALSO"
.BR pfsin (1)
.BR pfsout (1)
.SH BUGS
Please report bugs and comments to Rafal Mantiuk
<mantiuk@mpi-sb.mpg.de> and Grzegorz Krawczyk
<krawczyk@mpi-sb.mpg.de>.