| pfsclamp(1) | General Commands Manual | pfsclamp(1) |
NAME¶
pfsclamp - Clamp color and luminance channel values to be within the specified 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 minimum 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 memorial 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>.