other versions
- wheezy 1.8.5-1
- jessie 1.8.5-2+b1
- testing 2.0.5-2+b2
- unstable 2.0.5-2+b2
- experimental 2.0.6-1
pfsoutexr(1) | General Commands Manual | pfsoutexr(1) |
NAME¶
pfsoutexr - Write images or frames in OpenEXR formatSYNOPSIS¶
pfsoutexr [--compression <method>] [--keep-xyz] (<file> [--frames <range>]) [<file>...]DESCRIPTION¶
Use this command to write frames in OpenEXR format. Source pfs frames should be piped to the Standard Input. This command can write arbitrary channels to OpenEXR, color channels XYZ however are specially handled (see option keep-xyz).- --compression <method>, -c <method>
- Use one the the available compression methods:
- --keep-xyz
- By default, color channels XYZ from pfs stream are
converted to RGB color space and HALF format, which is a standard format
for color data in OpenEXR. Since Half format is 16-bit and floating points
values used in pfs stream are 32-bit, this conversion causes loss of
precision. When keep-xyz option is specified, color channels XYZ
are stored as they are without any conversion (32-bit float XYZ channels).
Note however, that most OpenEXR applications can recognize only RGB Half
format images and can not handle 32-bit XYZ.
- --fix-halfmax
- The maximum value that can be stored in OpenEXR file is
limited to 65504 if 16-bit HALF float is used (color channels are stored
by default in this format unless --keep-xyz switch is specified).
If the luminance data is calibrated in absolute values (cd/m^2), pixel
values can easily exceed 65504. To avoid clamping large pixel values,
pfsoutexr can rescale data to the range that is valid for 16-bit HALF
float format when --fix-halfmax switch is specified. If this switch
is missing, a warning message is displayed. Scale factor used for
rescaling is stored in OpenEXR file as OpenEXR standard attribute
WhiteLuminance, so that pfsinexr can later restore the absolute
values.
EXAMPLES¶
-
pfsin memorial.hdr | pfsoutexr memorial.exr -