DragonFly On-Line Manual Pages
pfsoutjpeghdr(1) DragonFly General Commands Manual pfsoutjpeghdr(1)
NAME
pfsoutjpeghdr - Write images or frames in JPEG-HDR format
SYNOPSIS
pfsoutjpeghdr (<file> [--linear] [--quality <val>] [--correction
<correct>] [--frames <range>]) [<file>...]
DESCRIPTION
Use this command to write JPEG file with HDR extension. This software
makes use of the High Dynamic Range Imaging Library from Sunnybrook
Technologies Inc. (c) Sunnybrook Inc. 2005
OPTIONS
--quality <val>, -q <val>
The --quality setting controls the overall compression/quality
trade-off, with 100 being the maximum setting, producing the
lowest losses and the largest output files. Quality settings
below 70 may result in significant image degradation, and should
be avoided in critical applications. Default: --quality=90
--correction <correct>, -c <correct>
The --correction setting controls the algorithm used during
downsampling of the HDR ratio image data. The default
precorrect option compensates for resampling errors by adjusting
the tone-mapped image to maximize the accuracy of the HDR
result. This option may sometimes induce modest halo artifacts
in the tone-mapped image at lower quality settings. If the
tone-mapped (backwards compatible) image is more important than
the HDR version, the postcorrect option may be used, instead.
To avoid all artifacts from HDR resampling, specify the fullsamp
option. This will result in slightly larger image files.
Default: --correction=precorrect
--alpha <a>, -a <a>; --beta <b>, -b <b>
The --alpha and --beta settings control color desaturation
during tone-mapping, which will also permits super-saturated
colors to pass through safely. (See the appendix of the paper
by Ward and Simmons cited below for details.) Use --alpha < 1 to
desaturate colors and --beta > 1 to enhance color saturation
contrast. Any input color space will be converted to the
standard YCC color space of JPEG, based on the CCIR-709 (sRGB)
primaries. Default: --alpha=1, --beta=1.
EXAMPLES
pfsin memorial.hdr | pfsoutjpeghdr memorial.jpeg
BUGS
Please report bugs and comments to Rafal Mantiuk <mantiuk@mpi-
sb.mpg.de>.
SEE ALSO
pfsinjpeghdr(1) Subband Encoding of High Dynamic Range
ImagerybyWardandSimmons (www.anyhere.com/gward/papers/apgv04)
pfsoutjpeghdr(1)