yuvmedianfilter man page on Peanut

Man page or keyword search:  
man Server   7435 pages
apropos Keyword Search (all sections)
Output format
Peanut logo
[printable version]

yuvmedianfilter(1)	      MJPEG tools manual	    yuvmedianfilter(1)

NAME
       yuvmedianfilter - A filter for yuv images produced by the mjpeg tools

SYNOPSIS
       yuvmedianfilter	[-r  num] [-R num] [-t num] [-T num] [-I num] [-f] [-w
       num] [-s num] [-v num] [-h]

DESCRIPTION
       yuvmedianfilter is designed to enhance/filter  images.	It  takes  the
       input from STDIN and writes output to STDOUT.
       This  filter  looks  around the current point for a radius and averages
       the values that fall inside a threshold.	 So the image is softened  and
       the  edges  become  more	 sharp.	 If the input material is noisy (it is
       always noisy but you do not  always  see	 it)  the  output  images  are
       improved	 and  the  encoder  spends less bandwidth encoding noise.  The
       more sophisticated version of image filtering is	 yuvdenoise.  But  you
       can  use	 both  programs	 in the encoding procces.  It cannot process a
       recorded file and write the improved version to another file.

OPTIONS
       yuvmedianfilter accepts the following options:

       -r num
	    Radius for luma median (default: 2 pixels)

       -R num
	    Radius for chroma median (default: 2 pixels)

       -t num
	    Trigger threshold for luma (default: 2 [0=disable])

       -T num
	    Trigger threshold for chroma (default: 2 [0=disable])

       -I num
	    Interlacing type (0=no, 1=yes, default: taken from yuv stream)

       -f   Fast mode, i.e. the threshold is ignored, and a simple mean of the
	    surrounding values is calculated.

       -w num
	    In	fast  mode,  the  weight given to the current value versus the
	    surrounding values.	 Default is 8.
	    Note that certain combinations of  radii  and  weights  have  been
	    optimized to be even faster -- radius 1 and weight 2.667, radius 1
	    and weight 8, and radius 2 and weight 8.

       -c num
	    In slow mode, more than this fraction of the pixels must be within
	    the	 threshold; otherwise the pixel is simply the weighted mean of
	    pixels within a radius of 1.  Default is 0.33333.

       -s num
	    Number of beginning frames to skip.	  The  first  num  frames  are
	    written  to	 stdout	 unfiltered.   This  is useful for resuming an
	    interrupted job without having to duplicate work.

       -v num
	    Verbosity level (0, 1 or 2)

       -h   Print out a help message

BUGS
       It is slow.  Using a radius greater than the default of 2 is  painfully
       slow.

AUTHOR
       This man page was written by Bernhard Praschinger.
       The yuvmedianfilter program was written by Mike Bernson, and adapted to
       the yuv4mpeg2 stream header format by Steven M. Schultz.

       If you have questions, remarks, problems or you just  want  to  contact
       the developers, the main mailing list for the MJPEG-tools is:
	 mjpeg-users@lists.sourceforge.net

       For more info, see our website at
	      http://mjpeg.sourceforge.net

SEE ALSO
       mjpegtools(1),	jpeg2yuv(1),   lav2yuv(1),  mpeg2enc(1),  ppmtoy4m(1),
       yuv2lav(1), yuvdenoise(1), yuvscaler(1)

MJPEG Linux Square	       24 February 2003		    yuvmedianfilter(1)
[top]

List of man pages available for Peanut

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Tweet
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
....................................................................
Vote for polarhome
Free Shell Accounts :: the biggest list on the net