pfsoutjpeghdr(1) [suse man page]

pfsoutjpeghdr(1)					      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  compati-
	      ble)  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)

pfstmo_fattal02(1)					      General Commands Manual						pfstmo_fattal02(1)

NAME

       pfstmo_fattal02 - Gradient domain high dynamic range compression

SYNOPSIS

       pfstmo_fattal02 [--alpha <val>] [--beta <val>] [--saturation <val>] [--noise <val>] [--verbose] [--help]

DESCRIPTION

       This command implements a tone mapping operator as described in:

       Gradient Domain High Dynamic Range Compression R. Fattal, D. Lischinski, and M. Werman In ACM Transactions on Graphics, 2002.

       With  respect to the original paper, this program provides additional parameter which limits the amplification of noise. The noise is often
       starkly amplified because of division by zero in one of the equations in the paper. Extension contributed by Przemyslaw Bazarnik.

       Results of this TMO can be improved by using a gamma correction.

OPTIONS

       --alpha <val>, -a <val>

	      Set alpha parameter. <val> defines the threshold gradient value (luminance differents of adjacent pixels) below which the  gradients
	      are amplified (detail enhancement) and above which the gradients are attenuated (global contrast reduction).
	       Suggested  range  is  1	to 0.0001. It is reasonable to change parameters by orders of magnitude, so for instance trying 0.1, 0.01,
	      0.001 etc.  (see paper for details).

       --beta <val>, -b <val>

	      Set beta parameter. <val> sets the strength of gradient (local contrast) modification.  Suggested range is 0.8 to  0.96  (see  paper
	      for details).  Value of 1 does not change contrasts, values above 1 reverse the effect: global contrast is stretched and details are
	      attenuated.  Values below 0.5 lead to very strong amplification of small contrast, so consider  using  --noise  parameter  close	to
	      'alpha' value to prevent noise.

       --saturation <val>, -s <val>

	      Amount of color saturation. Suggested range is 0.4 to 0.8. Default value: 0.6.

       --noise <val>, -n <val>

	      Reduces  gradient  amplification value for gradients close to 0 and reduces noise in the result. <val> defines gradient value (lumi-
	      nance differents of adjacent pixels) which is treated as noise. Suggested range is 0.0 to the value of alpha. Default  value  calcu-
	      lated based on alpha: 0.001*alpha.

       --verbose

	      Print additional information during program execution.

       --help

	      Print list of command line options.

EXAMPLES

       pfsin memorial.hdr | pfstmo_fattal02 -v | pfsgamma -g 2.2 | pfsout memorial.png

	      Tone map image and save it in png format.

SEE ALSO

       pfsin(1) pfsout(1) pfsview(1)

BUGS

       Please report bugs and comments on implementation to Grzegorz Krawczyk <krawczyk@mpi-sb.mpg.de>.

																pfstmo_fattal02(1)