Man page or keyword search:   man All Sections 1 - General Commands 2 - System Calls 3 - Subroutines, Functions 4 - Special Files 5 - File Formats 6 - Games and Screensavers 7 - Macros and Conventions 8 - Maintenence Commands 9 - Kernel Interface New Commands Server 4.4BSD AIX Alpinelinux Archlinux Aros BSDOS BSDi Bifrost CentOS Cygwin Darwin Debian DigitalUNIX DragonFly ElementaryOS Fedora FreeBSD Gentoo GhostBSD HP-UX Haiku Hurd IRIX Inferno JazzOS Kali Knoppix LinuxMint MacOSX Mageia Mandriva Manjaro Minix MirBSD NeXTSTEP NetBSD OPENSTEP OSF1 OpenBSD OpenDarwin OpenIndiana OpenMandriva OpenServer OpenSuSE OpenVMS Oracle PC-BSD Peanut Pidora Plan9 QNX Raspbian RedHat Scientific Slackware SmartOS Solaris SuSE SunOS Syllable Tru64 UNIXv7 Ubuntu Ultrix UnixWare Xenix YellowDog aLinux   25941 pages apropos Keyword Search (all sections) Output format html ascii pdf view pdf save postscript

pfsglview(1)							  pfsglview(1)

NAME
       pfsglview - Viewer for high-dynamic range images in pfs format

SYNOPSIS
       pfsglview [--h] [--v]

DESCRIPTION
       pfsview	is  a  OpenGL/GLUT  application for viewing high-dynamic range
       images. It expects pfs stream on the standard input  and	 displays  the
       frames in that stream one by one.

DYNAMIC RANGE WINDOW
       To  show	 high-dynamic  range data on a low-dynamic range monitor, pfs‐
       glview uses concept of a dynamic range window. The dynamic range window
       is  the	highest	 and  lowest  value that should be mapped to black and
       white pixel. Values above or below the window are clipped (see clipping
       methods below). The dynamic range window is displayed in pfsglview as a
       blue area on the dynamic range scale (second toolbox from the top). The
       window can be moved, shrunk and expended using a mouse or a keyboard.

ZOOMING AND PANNING
       To  zoom image, the mouse can be dragged in vertical direction with the
       left button pressed.  Pressing [space] button or	 pressing  left	 mouse
       button  above  the  statistic  window (left-bottom corner) changes from
       zooming to panning modes and vice versa. To pan image, the mouse can be
       dragged	in  vertical  and  horizontal  directions with the left button
       pressed.

POPUP MENU OPTIONS
       Zoom reset
	      Set default zoom parameters.

       Zoom in
	      Increase image (mouse dragging with left button pressed).

       Zoom out
	      Decrease image (mouse dragging with left button pressed).

       Increase exposure
	      Move dynamic range window into higher luminance values.

       Decrease exposure
	      Move dynamic range window into lover luminance values.

       Extend dynamic range
	      Extend dynamic range window.

       Shrink dynamic range
	      Shrink dynamic range window

       Low dynamic range
	      Set dynamic range window to <-1,1> range (log scale).

       Fit to dynamic range
	      Set dynamic range windo to minimum and maximum  luminance	 of  a
	      given image.

       Choose channel
	      Change image data channel.

       Mapping method
	      Change mapping method (see below for details).

       Next frame
	      Display next image from the pipe.

       Previous frame
	      Display previous image from the pipe.

       Histogram
	      Switch on/off histogram window.

       Info   Switch on/off info window.

       Save&Quit
	      Send  the	 visible  LDR  image  (8-bits) to stdout and quit pfs‐
	      glview.

MAPPING METHODS
       High-dynamic range data are usually better visualized using  non-linear
       scale,  for example a logarithmic or a power function. pfsglview offers
       several such scales, shown in popup menu. Gray-scale  values  for  each
       mapping method are computed by the formulas:

       LINEAR: y = (x-min)/(max-min)

       GAMMA: y = [ (x-min)/(max-min) ]^gamma

       LOGARITHMIC: y = (log10(x)-log10(min))/(log10(max)-log10(min))

       where y is the gray-scale value after mapping, x is an input HDR value,
       min and max are lower and upper bounds of the dynamic range window.

EXAMPLES
       pfsin memorial.hdr | pfsglview
	      See the memorial image.

       pfsin memorial.hdr | pfsglview | pfsout memorial.jpg
	      See the memorial image and save the clipped (8-bits) version  to
	      memorial.jpg  (Save&Quit	option from popup menu should be acti‐
	      vated).

SEE ALSO
       pfsin(1)

       Please report bugs and  comments	 to  Radoslaw  Mantiuk	<radoslaw.man‐
       tiuk@gmail.com>.

								  pfsglview(1)

Vote for polarhome