NAME
pfsinrgbe - Load images or frames in Radiance RGBE format
SYNOPSIS
pfsinrgbe [--linear] (<file> [--frames <range>] [--skip-missing])
[<file>...]
DESCRIPTION
pfsinrgbe command loads images in Radiance RGBE format and writes pfs
stream to the Standard Output. The pfs stream is usually piped to
another program for further processing. To detect the format
automatically based on the extension, use pfsin command.
Since RGBE is an HDR format, ’LUMINANCE’ tag is set to ’RELATIVE’
(relative linear luminance values).
To read images from standard input use a single dash ’-’ instead of
filename. The images are read until EOF is reached.
Each file can contain a %d pattern, which is substituted with frame
numbers. The pattern has the same syntax as C printf command. For
example, you can use %04d to make the frame number four digit with
proceedings zeros. You can select the frames using the following
options (the options must be always given after the file name):
--frames <range>
Range is given in mathlab / octave format:
startframe:step:endframe
Frame numbers start with startframe (default 0), are increased
by step (default 1) and stop at endframe You can skip one of
those values, for example 1:100 for frames 1,2,...,100 and 0:2:
for frame 0,2,4,... up to the last file that exists.
--skip-missing
Skip up to ten frames in a row if corresponding files are
missing. Otherwise the program stops reading sequence at the
first file that does not exists. This switch does not apply to
the first frame in a sequence. This switch can be useful if
there is a rendered animation where some of the frame has not
been generated.
--linear
Ignored for compatibility with pfsinppm.
EXAMPLES
pfsinrgbe intro%d.hdr frame%d.hdr | ...
Concatenate two animations into one and pass it to pipe for
further processing.
IMPORTANT NOTE
There is an incompatibility between viewers of RGBE format in terms of
absolute luminance values. The ximage viewer from Radiance package
expects radiance values in RGBE files and uses the WHITE_EFFICACY
constant equal to 179.0f to convert from radiance to luminance. This in
practice means that the values displayed with pfsview maybe higher than
expected. To compensate for this incompatibility we suggest to use
pfsabsolute command:
pfsinrgbe measured_luminance.hdr | pfsabsolute 1 179 | pfsview
This is not necessary when RGBE files are saved using pfsoutrgbe,
Radiance package, mkhdr or Photospheare. This is also not relevant when
only relative absolute values are considered.
BUGS
Please report bugs and comments on implementation to the discussion
group http://groups.google.com/group/pfstools
SEE ALSO
pfsin(1), pfsout(1)
pfsinrgbe(1)