NAME
pfstmo_mantiuk06 - Tone mapping in the contrast domain
SYNOPSIS
pfstmo_mantiuk06 [--factor <val>] [--equalize-contrast <val>]
[--saturation <val>] [--verbose] [--quiet] [--help]
DESCRIPTION
This command implements two tone mapping operators: contrast mapping
and contrast equalization. Both operators can produce very sharp images
(sometimes non-photorealistic) while minimizing contrast reversal (halo
artifacts). More information on these operators can be found in:
Rafal Mantiuk, Karol Myszkowski, Hans-Peter Seidel.
A Perceptual Framework for Contrast Processing of High Dynamic
Range Images
In: ACM Transactions on Applied Perception 3 (3), pp. 286-308,
2006.
http://www.mpi-inf.mpg.de/~mantiuk/contrast_domain/
This version contains several performance improvements made by Ed
Brambley.
If you find this TMO useful in your research project, please cite the
paper above.
The result of this TMO requires gamma correction.
OPTIONS
--equalize-contrast <val>, -e <val>
Use the contrast equalization algorithm. If this option is not
specified, the contrast mapping algorithm will be used. The
contrast equalization algorithm requires scaling parameter that
controls the amount sharpenning, which can range from 0.1 (very
sharp) to 1 (less sharp).
contrast equalization results in very sharp, but also less
natural images. contrast equalization may also enhance noise in
low-quality images.
--factor <val>, -f <val>
Contrast scaling factor (values 0-1) determines how much
contrast magnitudes should be reduced. This option cannot be
used with equalize-contrast. The lower value results in a
sharper image. Default value: 0.3
--saturation <val>, -s <val>
Saturation correction (values 0-1). The lower value results in
stronger desaturation. Default value: 0.8
--verbose, -v
Print additional information during program execution.
--quiet, -q
Do not display progress report.
--help, -h
Print list of commandline options.
EXAMPLES
pfsin memorial.hdr | pfstmo_mantiuk06 -f 0.5 | pfsgamma -g 2.2 |
pfsout memorial.png
Tone map an image using contrast mapping and save it in the PNG
format.
pfsin memorial.hdr | pfstmo_mantiuk06 -e 0.5 | pfsgamma -g 2.2 |
pfsout memorial.png
The same as above, but use the contrast equalization algorithm.
pfsin memorial.hdr | pfstmo_mantiuk06 -f 0.5 -s 1 | pfsview
For optimal results you can output the result to pfsview and
manually adjust the dynamic range window. Then save the image in
pfsview by selecting ’Save image...’ from the ’Frame’ menu or
pressing ’s’.
pfsin bridge.jpg --linear | pfsclamp --min 0.007 | pfstmo_mantiuk06 |
pfsview
Enhance the low-dynamic range image ’bridge’ and view the
result. pfsclamp command reduces noise for low code values.
SEE ALSO
pfsgamma(1) pfsclamp(1) pfsin(1) pfsout(1) pfsview(1)
BUGS
Please report bugs and comments to the pfstools discussion group
(http://groups.google.com/group/pfstools).
pfstmo_mantiuk06(1)