Man page - pfsstat(1)
Packages contains this manual
- jpeg2hdrgen(1)
- pfsoutrgbe(1)
- pfsouthdrhtml(1)
- pfsextractchannels(1)
- pfsinrgbe(1)
- pfsout(1)
- pfsstat(1)
- pfscolortransform(1)
- pfsoutyuv(1)
- pfsoutppm(1)
- dcraw2hdrgen(1)
- pfsinimgmagick(1)
- pfsclamp(1)
- pfsgamma(1)
- pfsin(1)
- pfsplotresponse(1)
- pfsoctavelum(1)
- pfsoutimgmagick(1)
- pfsinme(1)
- pfsretime(1)
- pfsoctavergb(1)
- pfsrotate(1)
- pfsinhdrgen(1)
- pfstag(1)
- pfscat(1)
- pfssize(1)
- pfsindcraw(1)
- pfsdisplayfunction(1)
- pfsabsolute(1)
- pfsouttiff(1)
- pfscut(1)
- pfsinexr(1)
- pfspanoramic(1)
- pfshdrcalibrate(1)
- pfsinppm(1)
- pfspad(1)
- pfsoutpfm(1)
- pfsintiff(1)
- pfsinpfm(1)
- pfsflip(1)
- pfs_automerge(1)
- pfsoutexr(1)
- pfsinyuv(1)
apt-get install pfstools
Manual
pfsstat
NAMESYNOPSIS
DESCRIPTION
EXAMPLES
BUGS
NAME
pfsstat - Show frame / image statistics
SYNOPSIS
pfsstat
DESCRIPTION
This command
will show a short text statistic on each image in the pfs
stream. In the statistics you can find:
File
- name of the input file
Width, Height
- image dimensions
Minimum
- minimum luminance of an image(*), given in
linear
units (relative luminance in cd/mĖ2) and logarithmic units
Maximum
- maximum
luminance of an image(*)
Average
- average luminance of an image(*)
Mean
- mean luminance of an image(*)
(*) Before min, max, average, median and dynamic range is computed, the following processing is performed on an image: 1) negative and zero values are replaced with the smallest positive value (to compute logarithms); 2) the image is low-pass filtered. The low-pass filtering removes few very dark or very bright pixels that can significantly influence estimation of the dynamic range. The percentile, instead of a low-pass filter, is sometimes used for the same purpose. However, a low-pass filter is preferred to the percentile in pfstools since, taking into account the processing that is happening in the human visual system, low-frequency band filter is more plausible.
Note: This command requires GNU Octave.
EXAMPLES
pfsin memorial.hdr | pfsstat
Show statistics for the memorial image.
BUGS
Please report bugs and comments to Rafal Mantiuk <mantiuk@mpi-sb.mpg.de>.