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Ppmfade User Manual(0)							   Ppmfade User Manual(0)

NAME
       ppmfade - generate a transition between two image files using special effects

SYNOPSIS
       ppmfade	[-f  first.ppm]  [-l  last.ppm]  [-mix|-spread|-shift|	-relief|-oil|-edge|-bent-
       ley|-block] [-base name]

DESCRIPTION
       This program is part of Netpbm(1)

       ppmfadegenerates a transition between either two input images or between one  input  image
       and  black.   You can use the 30 intermediate images generated to show a smooth transition
       between segments of a movie.  The input and output images are in the PPM format.   If  you
       specify	both  input  images, they should both be the same size.  If you want to fade from
       black to an image, specify only the last image.	If you want to	fade  from  an	image  to
       black,	specify   only	the  first  image.   ppmfade  names  the  resulting  image  files
       base.nnnn.ppm, where nnnn is a number varying between 0001 and 0030 and base is	what  you
       specify with via the -base option (default fade).

       Another way to convert by steps from one image to another is morphing.  You can use xmorph
       to do that.

OPTIONS
       -f first.ppm
	      This is the image file (PPM format) to be used at the beginning of the  transition.
	      If you don't specify this, the fade will start from black.

       -l last.ppm
	      This is the image file (PPM format) to be used at the ending of the transition.  If
	      you don't specify this, the fade will end with black.

       -mix   The two images are superimposed with the brightness of the first	image  decreasing
	      from  full  to  none  and the brightness of the final image increasing from none to
	      full.  The transition is quadratic in brightness	with  faster  transition  in  the
	      beginning and slower at the end.

       -spread
	      The pixels in the first image will be moved (spread) further and further from their
	      original location and then moved into the proper location in the final image.  This
	      is the default transition.

       -shift The pixels in the first image will be shifted further and further horizontally from
	      their original location and then moved into the proper location in the final image.

       -relief
	      The first image is faded to a Laplacian relief filtered version of the first image.
	      This  is	then faded to a Laplacian relief filtered version of the second image and
	      finally faded to the final image.

       -oil   The first image is faded to an 'oil transfer' version of the first image.  This  is
	      then  faded  to  an 'oil transfer' version of the second image and finally faded to
	      the final image.

       -edge  The first image is faded to an edge detected version of the first image.	 This  is
	      then faded to an edge detected version of the second image and finally faded to the
	      final image.

       -bentley
	       The first image is faded to a 'Bentley Effect' version of the first  image.   This
	      is  then	faded to a 'Bentley Effect' version of the second image and finally faded
	      to the final image.

       -block The first image is defocused to small blocks.  The small blocks  are  converted  to
	      match  a	defocused version of the last image.  The block version of the last image
	      is then focused to the final image.

       -base name
	      This forms part of the output filenames, as described above.

EXAMPLES
       ppmfade -f teapot.ppm -l pyr.ppm

       Fade from teapot.ppm to	pyr.ppm  generating  fade.0001.ppm  to	fade.0030.ppm  using  the
       'spread' transition.

       ppmfade -l teapot.ppm

       Fade from black to teapot.ppm generating fade.0001.ppm to fade.0030.ppm.

       ppmfade -f teapot.ppm -base end

       Fade from teapot.ppm to black generating end.0001.ppm to end.0030.ppm.

SEE ALSO
       tontsc manual, sgifade manual, smart_vfr manual, xmorph manual, ppm(1)

AUTHOR
       Bryan Henderson, Olympia WA; April 2000

       Inspired  by and intended as a replacement for pbmfade (not a Netpbm program) by Wesley C.
       Barris.

netpbm documentation			  April 1, 2000 		   Ppmfade User Manual(0)
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